mkvtoolnix/NEWS.md

Version ?

New features and enhancements

• MKVToolNix GUI: Windows: added a setting in the preferences to disable the GUI's dark color mode even if Windows's app color mode is set to dark. Implements #2646.
• MKVToolNix GUI: multiplexer: added an option to disable deriving the destination file name from the file title. Implements #2648.
• mkvmerge: MP4 reader: added support for BMP covert art images.
• MKVToolNix GUI: Windows: replaced the dark mode introduced in v39 with another dark mode that's less wasteful with space between widgets.

Bug fixes

• mkvmerge: MP4 reader: mkvmerge was reading eight bytes too many for cover art images. This could cause file identification to fail when the cover art was located at the end of the MP4 file. Even if it succeeded, this meant too much data present in the attachment. Fixes #2650.
• mkvmerge: MP4 reader: covert art images with unknown image types will be skipped instead of treated as JPEG images.

Build system changes

• Qt 5.9.0 or newer is now required for building MKVToolNix GUI.

Version 39.0.0 "In The Waiting Line" 2019-11-04

New features and enhancements

• mkvmerge: Blu-ray: when reading an MPLS playlist mkvmerge will look up and use chapter names from the Blu-ray's "track/chapter names" meta data if it exists. Part of the implementation of 2486.
• mkvmerge: MP4 reader: if present, cover art images (the udta.meta.list.covr atom) will be converted into attachments.
• MKVToolNix GUI: multiplexer: when adding a playlist from a Blu-ray disc, the disc library meta data will be parsed, and the biggest thumbnail, if present, will be added as a new attachment with name cover.jpg (extension depends on thumbnail's extension). Implements #2644.
• MKVToolNix GUI: multiplexer: when adding a playlist from a Blu-ray disc, the title from the disc library meta data will be set as the new file title if the disc library meta data contains one & no title has been set yet.
• MKVToolNix GUI: multiplexer: the automatically generated destination file name will now be based on the file title if one is set at that point. This works in conjunction with the title being said from the Blu-ray disc library meta data.
• MKVToolNix GUI: chapter editor: when reading chapters from an MPLS playlist the GUI will look up and use chapter names from the Blu-ray's "track/chapter names" meta data if it exists. Part of the implementation of 2486.
• MKVToolNix GUI: Windows: added a dark mode that's enabled when Windows 10's dark mode is turned on.
• translations: added a Bulgarian translation of the programs & the man pages by Симеон Цветков (see AUTHORS).

Bug fixes

• mkvmerge: attachments without a file name won't be ignored anymore. Part of the fix of #2642.
• MKVToolNix GUI: header editor: attachments with an empty name element will be shown as <unnamed> as originally intended. Part of the fix of #2642.
• Linux AppImage: the AppImage will no longer change directories before running the desired executable allow the use of relative file names. Fixes #2632.

Build system changes

• MKVToolNix now requires a C++ compiler that supports the following features of the C++17 standard: "[[maybe_unused]] attribute", "nested namespace definition", "structured bindings". For the GNU Compiler Collection (gcc) this means v7 or newer; for clang it means v4 or newer.
• Boost 1.60.0 or newer is now required.

Version 38.0.0 "The Silent Type" 2019-10-06

New features and enhancements

• mkvextract: chapters, tags & cue sheets will now be written to standard output if no file name is given, same as if - is given as the file name.
• MKVToolNix GUI: job queue: added a new setting in the preferences' "job queue & job status" section that, when enabled, will cause the GUI to remove all output files created by jobs that are either aborted by the user or that end in an error. Implements #2614.

Bug fixes

• all programs: macOS: fixed file access if the file name (including all path components) contains any Unicode character where NFC (Normalization Form Canonical Composed) and NFD (Normalization Form Canonical Decomposed) differ, e.g. German Umlauts. Fixes #2620.
• mkvmerge: when splitting by chapters the user can now split by chapters coming from one of the appended files, too. Fixes #2625.
• mkvmerge: AAC reader: fixed reading codec parameters (channels, sample rate) if a file starts with garbage that includes valid-but-bogus AAC headers. Fixes #2622.
• MKVToolNix GUI: Hebrew was added to the list of often-used languages so that it can be selected by default again. Fixes #2610.
• MKVToolNix GUI: when updating the GUI's settings from v37.0.0 or older, the GUI checks if the list of often-used languages equals the built-in list from v36.0.0. If it does, it will be updated to the built-in list changed in v37.0.0. Fixes #2611.

Build system changes

• Boost's Operators header library is now required.

Version 37.0.0 "Leave It" 2019-08-24

New features and enhancements

• MKVToolNix GUI: the list of often used languages now contains those from Wikipedia's "List of languages by native speakers" by default. Also by default only those languages will be shown in the language drop-down boxes.

Bug fixes

• MKVToolNix GUI: multiplexer: fixed a bug in the "make destination file names unique" logic that caused an existing number-in-parenthesis at the end of the file base name to be removed in certain situations (e.g. when the first added file was named m (3).mkv and both m (3) (1).mkv and m (3) (2).mkv existed already, the GUI was suddenly use m.mkv instead of m (3) (3).mkv).
• MKVToolNix GUI: on Windows the GUI is built with a slightly older version of the Qt library again (5.12.4). The Qt version used in release v36.0.0, v5.13.0, lead to crashes when doing certain things such as selecting multiple tracks in the multiplexer. Fixes #2605 and #26008.

Version 36.0.0 "Is That Jazz?" 2019-08-10

New features and enhancements

• mkvmerge: mkvmerge now allows appending AV1, VP8, VP9, H.264/AVC and H.265/HEVC tracks whose pixel dimensions differ. Implements #2582.

Bug fixes

• source code: fixed building with Boost 1.71.0. Fixes #2599.
• all: fixed the spelling of the H.264 & H.265 codec names.
• mkvmerge: Blu-ray MPLS handling: mkvmerge will now find corresponding M2TS files even if the clip_codec_identifier playlist item field is not set to M2TS in the MPLS file. Fixes #2601.
• mkvmerge: fixed handling of text files that use both DOS-style and Unix-style line endings resulting in problems such as text subtitle files not being parsed correctly. Fixes #2594.

Version 35.0.0 "All The Love In The World" 2019-06-22

New features and enhancements

• mkvmerge: JSON identification: the "codec name" track property will be output as codec_name. The JSON schema has been bumped to v12 for this change.
• MKVToolNix GUI: job queue: added a new type of action to execute after job completion: deleting source files for of multiplexer jobs. As this is a destructive operation, the action is disabled by default. Implements #869 and #2570.

Bug fixes

• mkvmerge: the "codec name" track property wasn't copied from Matroska files. Fixes #2566.
• MKVToolNix GUI: multiplexer: Windows: clearing the destination file name will reset the tab name to "<No destination file>" again. Fixes #2571.
• MKVToolNix GUI: multiplexer: the file types were not re-translated if the UI language was changed. Fixes #2572.

Version 34.0.0 "Sight and Seen" 2019-05-18

Bug fixes

• mkvmerge: all subtitle frames are now treated as key frames in order to fix wrong data in source files. Fixes #2541.
• mkvmerge: AV1: fixed frame timestamp calculation when reading bitstreams that lack timing information from IVF files. Fixes #2553.
• mkvmerge: Matroska reader: fixed an infinite loop that could happen with large video frames and applied timestamp files due to too much data being buffered at the wrong time. Fixes #2550.

Version 33.1.0 "Primrose" 2019-04-15

Bug fixes

• MKVToolNix GUI: multiplexer: Windows: using UNC paths (e.g. \\server\Videos) when the option "automatically set the destination file name" was set in the preferences, the GUI would create a destination file name with forward slashes (e.g. //server/Videos/outputfile.mkv), a syntax not supported by mkvmerge. Fixes #2533 & #2534.
• build system: the programs were accidentally built without stack protection (-fstack-protector-strong) on recent versions of gcc and clang.

Version 33.0.0 "A Little Bit of Madness" 2019-04-12

Bug fixes

• mkvinfo: when using the --size option, mkvinfo will now report the correctly if an element has an unknown size. Part of the fix of #2530.
• MKVToolNix GUI: info tool: clusters with an unknown size will now be read and displayed correctly. Part of the fix of #2530.
• MKVToolNix GUI: multiplexer: Windows: trying to open Blu-ray index or playlist files failed when the path to the files contained symbolic links (e.g. when mounting a drive in a sub-folder via Windows' disk management utility). Fixes #2522.
• MKVToolNix GUI: multiplexer: if a destination file names ends with a number in parenthesis (e.g. a year such as "(2017)"), that number will not be stripped anymore during the process of ensuring the destination file name is unique. Only those suffixes added automatically in prior attempts to make the file name unique will be removed. Fixes #2521.
• MKVToolNix GUI: multiplexer: Windows: the GUI will let the user change the drive letter part of the destination file name freely again and only verify its validity right before starting to mux/adding to the job queue. Before it tried to force that into something valid, often resulting in unintentional paths (such as "C:\users\…\DC\files\…"). Fixes #2527.

Version 32.0.0 "Astral Progressions" 2019-03-12

New features and enhancements

• mkvinfo: when sizes are output the size of the element's data portion is output in addition to the element's total size.
• MKVToolNix GUI: info tool: the element's data portion is shown as an extra column.
• MKVToolNix GUI: multiplexer: added column "Delay" to the track list containing the additional delay to apply during multiplexing. Implements #2506.

Bug fixes

• all: fixed handling of Unicode code points > U+FFFF. Fixes #2516.
• mkvmerge: Windows: mkvmerge was crashing with an exception when trying to identify certain files that can be used on Blu-rays (such as MPEG transport streams of MPLS play list files) and when the file name was given as a UNC path (e.g. \\servername\sharename\path\to\file.m2ts). The GUI emitted errors such as "the JSON output could not be parsed" in that case. Fixes #2507.
• MKVToolNix GUI: the portable mode wasn't detected correctly when the current working directory the GUI was started from wasn't the directory the GUI's executable file was located it. Examples for when this is the case are Windows' "send to" or "open with" functions. Fixes #2501.
• MKVToolNix GUI: multiplexer: using button to change the current destination directory to one of the recently used ones did not update the file name according to the "make file name unique" setting. Part of the fix of #2519.
• MKVToolNix GUI: multiplexer: the function "set destination file name from selected file's name" will now only change the destination file's name but not its path. Part of the fix of #2519.

Build system changes

• libEBML v1.3.7 and libMatroska 1.5.0 are now required as they fix their handling of Unicode code points > U+FFFF (see #2516).

Version 31.0.0 "Dolores In A Shoestand" 2019-02-09

New features and enhancements

• all programs: added a new option --abort-on-warnings that will cause the program to abort after it has emitted the first warning, similar to how it aborts after the first error. Implements #2493.

• mkvmerge, mkvextract: when closing files that were opened for writing, cached data will not be flushed to storage automatically anymore. This reverts the workaround implemented for #2469. A new option was added to both programs (--flush-on-close) that re-enables flushing for people who are affected by data loss such as described in #2469.

  The reason is that automatic flushing causes long delays in processing queues when the output by mkvmerge/mkvextract isn't the final product but just an intermediate result to be processed further.

  Implements #2480.

• MKVToolNix GUI: multiplexer: the dialog previewing different character sets for text subtitles will now keep the position of the displayed text when switching between character sets. Implements #2489.

Bug fixes

• mkvmerge: AVI reader: using DV type 1 AVIs will now result in an unsupported file type being reported (as the underlying AVI library doesn't support them) instead of crashing mkvmerge. Fixes #2491.
• mkvmerge: HEVC: the height of interlaced streams will now be set correctly to the height of the full frame instead of the height of a single interlaced field. Fixes #2446.
• mkvmerge: MP4 reader: edit lists consisting solely of elements that mkvmerge doesn't support (such as dwells) are simply ignored. Before no data was read for such tracks at all. Fixes #2487.
• mkvmerge: text subtitles: entries with an explicit duration of 0ms will now be handled correctly: the 0ms duration will be stored in Matroska instead of the difference between the current and the following entry. Fixes #2490.
• MKVToolNix GUI: multiplexer, chapter editor: fixed drag & drop handling with Qt 5.12.0 and newer. Fixes #2472.
• MKVToolNix GUI: multiplexer: the GUI did not clean up temporary files created when running mkvmerge. Fixes #2499.

Build system changes

• Qt 5.4.0 or newer has required (up from 5.3.0) since version 30.0.0; I just forgot to include this entry.

Version 30.1.0 "Forever And More" 2019-01-05

Bug fixes

• build system: fixed building on non-UTF-8 locales. Fixes #2474.
• MKVToolNix GUI: multiplexer: implemented a workaround for drag & drop not working on macOS with Qt 5.12 due to a bug in Qt 5.12. Fixes #2472.
• MKVToolNix GUI: chapter editor: when opening a Matroska/WebM file that doesn't contain chapters and later saving chapters back to them, the editor was truncating the file down to a couple of KB in size. This was a regression introduced with the implementation of #2439 in v30.0.0 Fixes #2476.

Version 30.0.0 "Interstellar" 2019-01-04

New features and enhancements

• mkvextract: WAV extractor: mkvextract will now write W64 files instead of WAV files if the file name extension is .w64 or if the final file size is bigger than 4 GB, the file size limit for WAV files. Implements #2458.
• MKVToolNix GUI: multiplexer: a new button was added next to the "destination file" controls. Clicking it shows a menu with the ten most recently used output directories. Selecting one of them will change the destination file to the selected directory keeping the file name. Implements #2468.
• MKVToolNix GUI: multiplexer (preferences): the ten most recently used values for the "relative output directory" and "fixed output directory" settings are now saved. The corresponding settings have been changed into combo boxes allowing quick access to those recent values.
• MKVToolNix GUI: multiplexer (preferences): the predefined split sizes and durations can now be customized in the preferences.
• MKVToolNix GUI: chapter editor: added an option in the "Chapter editor" menu for appending chapters from an existing file to the currently open editor tab. Part of the implementation of #2439.
• MKVToolNix GUI: chapter editor: added an action in the context menu for copying the selected entry and all of its children to another open editor tab. Part of the implementation of #2439.

Bug fixes

• mkvmerge: all files opened for writing will now be flushed once before they're closed. This ensures the operating system actually writes all cached data to disk preventing data loss in certain situations such as power outages or buggy drivers in combination with suspending the computer. Fixes #2469.
• mkvmerge: AAC: under certain conditions 8 channel audio files were taken for 7 channel ones.
• MKVToolNix GUI: multiplexer: removing a file added as an "additional part" will no longer cause a crash. Fixes #2461.
• source code: fixed compilation with Boost 1.69.0 after API-breaking change to the boost::tribool class. Fixes #2460.

Version 29.0.0 "Like It Or Not" 2018-12-01

Important notes

• The string formatting library used was switched from boost::format to fmt. See the section "Build system changes" for details.

New features and enhancements

• MKVToolNix GUI: added an option in the preferences for disabling automatic scaling for high DPI displays. Implements #2415.
• MKVToolNix GUI: the GUI will now prevent the system from going to sleep while the job queue is running. This feature is implemented for macOS, Windows and Linux/Unix systems where the org.freedesktop.login1.Manager D-Bus interface is available. Implements #2411.

Bug fixes

• mkvmerge: chapter generation: the start timestamps of chapters generated in intervals was wrong for files whose smallest video timestamp was bigger than 0. Fixes #2432.
• mkvmerge: MP4 reader: fixed handling of atoms whose size exceeds the parent atom's size. Fixes #2431.
• mkvmerge, MKVToolNix GUI's chapter editor: the chapter name template will now also be used when reading Ogg-style chapter files with empty chapter names. Fixes #2441.
• mkvextract: AAC: mkvextract will now write the program config element (PCE) before the first AAC raw data packet if the PCE is present in the AudioSpecificConfig structure in the Codec Private Matroska element. The PCE carries vital information about the number of channels and is required in certain cases. Fixes #2205 and #2433.
• mkvpropedit, MKVToolNix GUI's header editor: in situations when a one-byte space must be covered by a new EBML void element the following element must be moved up instead. If that moved element is a cluster, the corresponding cue entries will now be updated to reflect the cluster's new position. Fixes #2408.
• MKVToolNix GUI: Windows: the application manifest is now included properly so that Windows actually recognizes it. See #2415.

Build system changes

• Qt's D-Bus implementation is now required for building on systems other than macOS and Windows,
• The boost::format library is not used anymore.
• The fmt library is now required. Versions 3 and newer are supported. As not all Linux distributions include packages for the library, its release 5.2.1 comes bundled with MKVToolNix. The configure script will check for a system version of the library and use it if present and recent enough. Otherwise it will fall back to the bundled version and link that statically.

Version 28.2.0 "The Awakening" 2018-10-25

Bug fixes

• mkvmerge, mkvinfo, mkvextract, mkvpropedit, MKVToolNix GUI's info tool & chapter editor: fixed a case of memory being accessed after it had been freed earlier. This can be triggered by specially crafted Matroska files and lead to arbitrary code execution. The vulnerability was reported as Cisco TALOS 2018-0694 on 2018-10-25.

Version 28.1.0 "Morning Child" 2018-10-23

Bug fixes

• mkvmerge: AV1 parser: fixed an error in the sequence header parser if neither the reduced_still_picture_header nor the frame_id_numbers_present_flag is set. Part of the fix for #2410.
• mkvmerge: AV1 parser: when creating the av1C structure for the Codec Private element the sequence header OBU wasn't copied completely: its common data (type field & OBU size among others) was missing. Part of the fix for #2410.
• mkvmerge: Matroska reader, AV1: mkvmerge will try to re-create the av1C data stored in Codec Private when reading AV1 from Matroska or WebM files created by mkvmerge v28.0.0. Part of the fix for #2410.
• MKVToolNix GUI: info tool: the tool will no longer stop scanning elements when an EBML Void element is found after the first Cluster element. Fixes #2413.

Version 28.0.0 "Voice In My Head" 2018-10-20

New features and enhancements

• mkvmerge: AV1 parser: updated the code for the finalized AV1 bitstream specification. Part of the implementation of #2261.
• mkvmerge: AV1 packetizer: updated the code for the finalized AV1-in-Matroska & WebM mapping specification. Part of the implementation of #2261.
• mkvmerge: AV1 support: the --engage enable_av1 option has been removed again. Part of the implementation of #2261.
• mkvmerge: MP4 reader: added support for AV1. Part of the implementation of #2261.
• mkvmerge: DTS: implemented dialog normalization gain removal for extension substreams. Implements #2377.
• mkvmerge, mkvextract: simple text subtitles: added a workaround for simple text subtitle tracks that don't contain a duration. Implements #2397.
• mkvextract: added support for extracting AV1 to IVF. Part of the implementation of #2261.
• mkvextract: IVF extractor (AV1, VP8, VP9): precise values will be used for the frame rate numerator & denominator header fields for certain well-known values of the track's default duration.
• mkvmerge: VP9: mkvmerge will now create codec private data according to the VP9 codec mapping described in the WebM specifications. Implements #2379.
• MKVToolNix GUI: automatic scaling for high DPI displays is activated if the GUI is compiled with Qt ≥ 5.6.0. Fixes #1996 and #2383.
• MKVToolNix GUI: added a menu item ("Help" → "System information") for displaying information about the system MKVToolNix is running on in order to make debugging easier.
• MKVToolNix GUI: multiplexer, header editor: the user can enter a list of predefined track names in the preferences. She can later select from them in "track name" combo box. Implements #2230.

Bug fixes

• mkvmerge: JSON identification: fixed a bug when removing invalid UTF-8 data from strings before they're output as JSON. Fixes #2398.
• mkvmerge: MP4/QuickTime reader: fixed handling of PCM audio with FourCC in24. Fixes #2391.
• mkvmerge: MPEG transport stream reader, teletext subtitles: the decision whether or not to keep frames around in order to potentially merge them with the following frame is made sooner. That avoids problems if there are large gaps between teletext subtitle frames which could lead to frames being interleaved too late. Fixes #2393.
• mkvextract: IVF extractor (AV1, VP8, VP8): the frame rate header fields weren't clamped to 16 bits properly causing wrong frame rates to be written in certain situations.
• mkvpropedit, MKVToolNix GUI's header editor: fixed file corruption when a one-byte space must be covered with a new EBML void element but all surrounding elements have a "size length" field that's eight bytes long already. Fixes #2406.

Version 27.0.0 "Metropolis" 2018-09-26

New features and enhancements

• mkvmerge: chapters: the timestamps of chapters read from containers or from chapter files can be adjusted (multiplication and addition) with the new --chapter-sync option or using the special track ID -2 for the existing --sync option. Part of the implementation of #2358.
• MKVToolNix GUI: multiplexer: adjusted & added controls for mkvmerge's new feature of being able to adjust chapter timestamps. Part of the implementation of #2358.
• MKVToolNix GUI: multiplexer: the GUI can now ask for confirmation when the user is about to create a file that won't contain audio tracks. It does this by default if at least one source file contains an audio track. Implements #2380.

Bug fixes

• mkvmerge: AC-3: dialog normalization gain removal was corrupting E-AC-3 frames irreversibly by writing checksums in places where they didn't belong. Additionally only the first E-AC-3 frame in a Matroska was processed but not additional dependent frames in the same block. Fixes #2386.
• MKVToolNix GUI: fixed a leak of Windows font resources leading to a general slowdown and subsequent crash. Fixes #2372.

Version 26.0.0 "In The Game" 2018-08-26

New features and enhancements

• mkvmerge: chapter generation: if the name template given by --generate-chapters-name-template is empty, no names (ChapterDisplay master elements with ChapterString/ChapterLanguage children) will be generated for the chapter atoms. Part of the implementation of #2275.
• mkvmerge: chapters: chapter names generated from MPLS files will now use the name template if one is set via --generate-chapters-name-template. Part of the implementation of #2275.
• mkvmerge: mkvmerge will no longer abort with an error message if no audio, video and subtitle tracks should be multiplexed. This allows copying of chapters from non-chapter source files (e.g. Matroska or MP4 files).
• MKVToolNix GUI: the font size in the tool selector on the left will scale with the font size the user selects in the preferences.
• MKVToolNix GUI: the GUI will no longer automatically resize the columns in tree and list views to match the content size. Instead it remembers and restores the widths set by the user. Implements #2353.
• MKVToolNix GUI: multiplexer: the chapter name template will now be set automatically to the name template in the preferences' "chapter editor" section. Additionally the option --generate-chapters-name-template … will be passed to mkvmerge in situations when mkvmerge will generate chapters (either because automatic generation is enabled or if chapters are generated for MPLS playlists). Part of the implementation of #2275.
• MKVToolNix GUI: chapter editor: if the chapter name template is empty, chapters will be generated without names. Part of the implementation of #2275.
• MKVToolNix GUI: chapter editor: added an option to remove all chapter names to the "additional modifications" dialog. Part of the implementation of #2275.

Bug fixes

• mkvmerge: Matroska reader: fixed wrong timestamps when appending Matroska files where the second Matroska file's first timestamp is bigger than 0. Fixes #2345.
• mkvmerge: MP4 reader: fixed division by zero errors during file identification if the timescale is 0 in the MVHD atom.
• mkvmerge: Windows Television DVR files are now recognized as an unsupported file type. This prevents mis-detection as MPEG-2 with an accompanying flood of error messages. Fixes #2347.
• MKVToolNix GUI: info tool: under certain circumstances "cues" were shown at the wrong level (inside the previous master element instead of on level 1). Fixes #2361.
• MKVToolNix GUI: job queue: fixed invalid memory handling and consequent crashes when using the "edit in corresponding tool & remove from job queue" option if one of the files in that job contained attached files. Fixes #2368.

Build system changes

• An AppStream metadata file will be installed in $prefix/share/metainfo.

Version 25.0.0 "Prog Noir" 2018-07-12

New features and enhancements

• mkvmerge: SRT/ASS/SSA text subtitles: for files for which no encoding has been specified, mkvmerge will try UTF-8 first before falling back to the system's default encoding. Part of the implementation of #2246.
• mkvmerge: SRT/ASS/SSA/WebVTT text subtitles: a warning is now emitted if invalid 8-bit characters are encountered outside valid multi-byte UTF-8 sequences. Part of the implementation of #2246.
• mkvmerge: Matroska & MPEG transport stream readers: the encoding of text subtitles read from Matroska files can now be changed with the --sub-charset parameter.
• Linux: starting with release 25 an AppImage will be provided which should run on any Linux distribution released around the time of CentOS 7/Ubuntu 14.04 or later.
• macOS: translations: updated the build.sh script to build libiconv and a complete gettext. Together with an additional fix to how translation files are located, MKVToolNix can now use all interface languages on macOS, too. Fixes #2110, #2307, #2323.

Bug fixes

• mkvmerge: AVC/H.264: fixed file identification failing for certain elementary streams due to internal buffers not being cleared properly. Fixes #2325.

• mkvmerge: HEVC/H.265: fixed file identification failing for certain elementary streams due to internal buffers not being cleared properly. This is the HEVC analog to what was fixed for AVC in #2325.

• mkvmerge: MLP code: fixed various issues preventing MLP from being parsed correctly. Fixes #2326.

• mkvmerge: TrueHD/MLP packetizer; dialog volume normalization removal isn't attempted if the track is an MLP track as the operation is only supported for TrueHD, not MLP.

• mkvmerge: MPEG TS reader: when reading MPLS mkvmerge will now compare the MPLS's start and end timestamps against the transport stream's PTS instead of its DTS. Otherwise the first key frame of a video track might be dropped if it isn't the first in presentation order. Fixes #2321.

• mkvmerge: JSON identification: mkvmerge will ensure that all strings passed to the JSON output modules are valid UTF-8 encoded strings by replacing invalid bytes with placeholder characters. This avoids the JSON library throwing an exception and mkvmerge aborting on such data. Fixes #2327.

• mkvmerge: audio packetizers: mkvmerge will now keep discard padding values if they're present for packets read from Matroska files. Fixes #2296.

• mkvmerge: Ogg Opus reader: packet timestamps aren't calculated by summing up the duration of all packets starting with timestamp 0 anymore. Instead the algorithm is based on the Ogg page's granule position and which packet number is currently timestamped (special handling for the first and last packets in the stream).

  • This fixes the first timestamp if the first Ogg packet's granule position is larger than the number of samples in the first packet (= if the first sample's timestamp is bigger than 0). mkvmerge will keep those offsets now and inserts "discard padding" only where it's actually needed.
  • It also improves handling of invalid files where the first Ogg packet's granule position is smaller than the number of samples in the first packet (= the first sample's timestamp is smaller than 0). mkvmerge will now shift all timestamps up to 0 in such a case instead of inserting "discard padding" elements all over the place.
  • mkvmerge will no longer insert "discard padding" elements if the difference between a) the calculated number of samples in the packet according to the granule position and b) the actual number of samples as calculated from the bitstream is one sample or less and if the packet isn't the last one in the stream. This circumvents certain rounding errors.
  • The timestamp of the first packet after a gap in the middle of the stream is now calculated based on the Ogg page the packet belongs to, and not based on the timestamps before the gap.

  Fixes #2280.

• mkvmerge: complete rewrite of the progress handling. It's now based upon the total size of all source files and the current position within them instead of the number of frames/blocks to be processed. This simplifies calculation when appending files and fixes rare cases of when progress report was obvious wrong (e.g. stuck at 0% right until the end). Fixes #2150 and #2330.

• MKVToolNix GUI: header editor: non-mandatory elements couldn't be removed anymore due to a regression while fixing #2320. They can now be removed again. Fixes #2322.

Version 24.0.0 "Beyond The Pale" 2018-06-10

New features and enhancements

• mkvmerge: MP4 reader: improved the detection of edit lists consisting of two identical entries, each spanning the file's duration as given in the movie header atom. The second entry is ignored in such cases. See #2306.
• mkvmerge: JSON identification: the "display unit" video track property is now reported as display_unit. The JSON schema has been bumped to v11 for this change.
• mkvmerge, mkvextract: AVC/H.264: empty NALUs will now be removed.
• mkvextract: VobSub extraction: empty SPU packets will now be dropped during extraction as other tools such as MP4Box cannot handle them correctly. Implements #2293.

Bug fixes

• mkvmerge: E-AC-3 parser: fixed determining the number of channels for streams that contain an AC-3 core with dependent E-AC-3 frames. Fixes #2283.
• mkvmerge: Matroska reader: fixed mkvmerge buffering the whole file if a video track is multiplexed that consists of only one or a few frames. Fixes #2304.
• mkvmerge: the "display unit" video track property will now be kept if it is set in the source file. Fixes #2317.
• MKVToolNix GUI: multiplexer: when scanning playlists, all playlists were offered for selection regardless of the value of the "minimum playlist duration" setting. Fixes #2299.
• MKVToolNix GUI: multiplexer: deriving track languages from file names: the regular sub-expressions for ISO 639-1 codes could match on empty strings, too, causing matches in wrong places and hence no language being recognized in certain situations. Fixes #2298.
• MKVToolNix GUI: header editor: fixed a crash when saving the file fails (e.g. because it isn't writable). Fixes #2319.
• MKVToolNix GUI: header editor: the editor was wrongfully claiming that mandatory elements with default values cannot be removed in the "status" text. Fixes #2320.
• MKVToolNix GUI: preferences: on macOS & Linux the setting "enable copying tracks by their type" wasn't restored on program start. Fixes #2297.

Other changes

• Niels Lohmann's JSON library: the bundled version has been updated from v1.1.0 (git revision 54d3cab) to v3.1.1 (git revision g183390c1).
• pugixml library: the bundled version has been updated from v1.8 to v1.9 (git revision e584ea3).

Version 23.0.0 "The Bride Said No" 2018-05-02

New features and enhancements

• mkvmerge: input: format detection uses file-extension to improve performance and to give preference when several formats match.
• mkvmerge: AV1: added support for reading AV1 video from Open Bitstream Unit files.
• mkvmerge: AV1: adjusted the code for the AV1 bitstream format changes made up to 2018-05-02 (git revision d14e878).
• mkvmerge: MP4 reader: if a track has an edit list with two identical entries, each spanning the file's duration as given in the movie header atom, then the second entry will now be ignored. Improves the handling of files with bogus data; see #2196 and #2270.
• MKVToolNix GUI: multiplexer: added options to only enable tracks of certain types by default. Implements #2271.
• MKVToolNix GUI: multiplexer: added an option to enable dialog normalization gain removal by default for all audio tracks for which the operation is supported. Implements #2272.
• MKVToolNix GUI: multiplexer: when deriving track languages from the file names is active and the file name contains the usual season/episode pattern (e.g. "S02E14"), then only the part after the season/episode pattern will be used for detecting the language. Part of the improvements for #2267.
• MKVToolNix GUI: multiplexer: the regular expression used for deriving track languages from the file names can now be customized in the preferences. Part of the improvements for #2267.
• MKVToolNix GUI: multiplexer: the user can now customize the list of track languages the GUI recognizes in file names. This list defaults to a handful of common languages instead of the full list of supported languages. Part of the improvements for #2267.

Bug fixes

• mkvmerge: MP3 packetizer: removed a memory leak growing linearly with the track's size.
• mkvmerge: VobSub packetizer: whenever a VobSub packet doesn't contain a duration on the container level, mkvmerge will now set it from the duration in the SPU packets. Before it was accidentally setting the SPU-level duration to 0 instead. Fixes #2260.
• mkvmerge: track statistics tags: if writing the Date element is deactivated via --no-date, the _STATISTICS_WRITING_DATE_UTC isn't written either anymore. Fixes #2286.
• mkvmerge, mkvextract, mkvpropedit: removed several small, constant-size memory leaks.
• mkvextract: fixed a crash when mkvextract with a non-Matroska file as the source file. Fixes #2281.
• MKVToolNix GUI: the central area is now scrollable, allowing the GUI to be resized to almost arbitrary sizes. Fixes #2265.
• MKVToolNix GUI: multiplexer: the "copy file title to destination file name" functionality will now replace everything in the destination file name up to the last period instead of only up to the first period. Fixes #2276.

Build system changes

• build system: MKVToolNix now requires a compiler that supports the following features of the C++14 standard: "user-defined literals for std::string". For the GNU Compiler Collection (gcc) this means v5.x or newer; for clang it means v3.4 or newer.
• Windows: linking against and installing shared version of the libraries with MXE is now supported by setting configure's host triplet accordingly, e.g. --host=x86_64-w64-mingw32.shared.

Other changes

• mkvmerge: AV1: support for AV1 must be activated manually by adding --engage enable_av1 as the AV1 bitstream specification hasn't been finalized yet.

Version 22.0.0 "At The End Of The World" 2018-04-01

New features and enhancements

• mkvmerge, MKVToolNix GUI multiplexer: AC-3, DTS, TrueHD: added an option for removing/minimizing the dialog normalization gain for all supported types of the mentioned codecs. Implements #1981.
• mkvmerge: AV1: added support for reading AV1 video from IVF, WebM and Matroska files.
• mkvmerge: FLAC: mkvmerge can now ignore ID3 tags in FLAC files which would otherwise prevent mkvmerge from detecting the file type. Implements #2243.
• mkvinfo: the size and positions of frames within "SimpleBlock" and "BlockGroup" elements are now shown the same way they're shown for other elements (by adding the -v -v and -z options).
• MKVToolNix GUI: multiplexer: added options for deriving the track languages from the file name by searching for ISO 639-1/639-2 language codes or language names enclosed in non-word, non-space characters (e.g. "…[ger]…" for German or "…+en+…" for English). Implements #1808.
• MKVToolNix GUI: info tool: implemented reading all elements in the file after the first cluster. Only top-level elements are shown; child elements are only loaded on demand. Implements the rest of #2104.
• MKVToolNix GUI: info tool: added a context menu with the option to show a hex dump of the element with the bytes making up the EBML ID and the size portion highlighted in different colors. In-depth highlighting is done for the data in SimpleBlock and Block elements.
• MKVToolNix GUI: chapter editor: added an option to remove all end timestamps to the "additional modifications" dialog. Implements #2231.

Bug fixes

• mkvmerge: MP4 reader: fixed reading the ESDS audio header atom if it is located inside a "wave" atom inside the "stsd" atom.
• mkvmerge: MP4 reader: AAC audio tracks signalling eight channels in the track headers but only seven in the codec-specific configuration will be treated as having eight channels.
• mkvmerge: MPEG TS reader: fixed wrong handling of the continuity counter for TS packets that signal that TS payload is present but where the adaptation field spans the whole TS packet.
• mkvmerge: the 'document type version' and 'document type read version' header fields are now set depending on which elements are actually written, not on which features are active (e.g. if a SimpleBlock is never written, then the 'read version' won't be set to 2 anymore). Part of the fix for #2240.
• mkvmerge: the 'document type version' header field is now set to 4 correctly if any of the version 4 Matroska elements is written. Part of the fix for #2240.
• mkvinfo: summary mode: the file positions reported for frames in BlockGroup elements did not take the bytes used for information such as timestamp, track number flags or lace sizes into account. They were therefore too low.
• mkvpropedit, MKVToolNix GUI header editor: the 'document type version' and 'document type read version' header fields are now updated if elements written by the changes require higher version numbers. Part of the fix for #2240.
• mkvpropedit, MKVToolNix GUI header editor: mandatory elements can now be deleted if there's a default value for them in the specifications. Fixes #2241.
• source code: fixed a compilation error on FreeBSD with clang++ 5.0. Fixes #2255.

Build system changes

• A compilation database (in the form of a file compile_commands.json) can be built automatically if the variable BUILD_COMPILATION_DATABASE is set to yes (e.g. as rake BUILD_COMPILATION_DATABASE=yes).

Version 21.0.0 "Tardigrades Will Inherit The Earth" 2018-02-24

New features and enhancements

• mkvmerge: track statistics tags: the TagDefault element will not be written anymore as it was always set to the default value 1 anyway. Implements #2202.
• mkvmerge, MKVToolNix GUI: JSON files can now contain C++-style line comments outside of strings (e.g. something like this: // this is ignored). Such comments, even though not part of the official JSON specifications, are now ignored when reading JSON files.
• MKVToolNix GUI: chapter editor: opening a Matroska file without chapters in it will now open the file in an empty chapter editor instead of showing an error message. Implements #2218.
• MKVToolNix GUI: an "info" tool has been added, replacing the functionality of mkvinfo's GUI. The functionality is not on par yet but will be for release v22. Implements most of the functionality of #2104.

Bug fixes

• build system: configure was treating --disable-ubsan and --disable-addrsan the same as --enable-ubsan and --enable-addrsan. Fixes #2199.
• build system: an error message is output if a command to execute is not found instead of silently failing.
• build system: in addition to looking for the gettext C function and library, configure now also verifies the presence of the msgfmt program instead of simply relying on it.
• mkvmerge: appending files with additional parts at the same time was broken if more than one additional part was appended (e.g. when appending files from DVDs with something like '(' VTS_01_1.VOB VTS_01_2.VOB ')' + '(' VTS_02_1.VOB VTS_02_2.VOB ')'). In such a situation the content from files VTS_02_1.VOB and VTS_02_2.VOB where laid out in parallel to the content from the earlier files.
• mkvmerge: FLV reader: a single invalid AAC frame was written for AAC audio tracks with codec initialization data longer than five bytes.
• mkvmerge: FLV reader: timestamps will be normalized down to 0. Fixes #2220.
• mkvmerge: MP4 reader: if an AAC track doesn't contain an AAC-specific decoder configuration in the ESDS portion, then a default decoder configuration will be generated based on the track's header data instead of skipping the track. Fixes #2221.
• mkvmerge: MP4 reader: fixed reading HEVC/H.265 video tracks if they're stored as Annex B byte streams inside MP4. Fixes #2215.
• mkvmerge: Ogg Opus reader: mkvmerge will now emit a warning instead of aborting when it encounters an Ogg Opus page with no data in the packet. Fixes #2217.
• mkvmerge, mkvextract: Matroska parser: fixed a segmentation fault that occurred whenever the first level 1 element after resyncing after an error in the file structure isn't a cluster. Fixes #2211.
• mkvmerge, MKVToolNix GUI multiplexer & header editor: fixed a crash during file type detection for attachments if MKVToolNix is installed in a path with non-ASCII characters (e.g. German Umlauts). Fixes #2212.
• mkvinfo: the --hex-positions parameter did nothing in summary mode.
• mkvinfo: Windows: line endings will be written as \r\n (carriage return & line feed) again instead of just \n (line feed).
• mkvpropedit: adding track statistics tags: for tracks with content encoding (compression) mkvpropedit is now accounting the uncompressed number of bytes, not the encoded (compressed) number of bytes. Fixes #2200.
• MKVToolNix GUI: multiplexer: the subtitle character set can now be set for appended subtitle files, too. Fixes #2214.
• MKVToolNix GUI: multiplexer: when appending, all tracks appended to disabled tracks will start out disabled, too.

Build system changes

• mkvinfo: the GUI portion has been removed. mkvinfo is now a pure command-line program again.

Version 20.0.0 "I Am The Sun" 2018-01-15

Important notes

• Feature removal: several deprecated features have been removed:

  • mkvmerge: the deprecated options --identify-verbose (and its counterpart -I), --identify-for-gui, --identify-for-mmg and --identification-format verbose-text
  • all command line tools: support for the deprecated, old, proprietary format used for option files
  • all command line tools: support for passing command line options via the deprecated environment variables MKVTOOLNIX_OPTIONS, MKVEXTRACT_OPTIONS, MKVINFO_OPTIONS, MKVMERGE_OPTIONS and MKVPROPEDIT_OPTIONS

• mkvinfo: most of its code was re-written in order to lay the groundwork for including its functionality in MKVToolNix GUI but with more features than the existing mkvinfo GUI. The result is that a lot of its output has been changed slightly while keeping the basic layout. Changes include but aren't limited to:

  • Several element names are a bit clearer (e.g. Maximum cache instead of MaxCache).
  • All timestamps and durations are now output as nanoseconds in formatted form (e.g. 01:23:45.67890123). All additional formats (e.g. floating point numbers output in seconds or milliseconds) were removed.
  • Element names for chapters and tags are now translated if a translation is available.
  • Elements located in wrong positions within the Matroska document are handled better.

  While mkvinfo's output is mostly kept very stable, it is not designed to be parsed by other utilities. Even though I've tried hard to cram all changes and cleanups into this version, additional changes may be made in the next couple of releases depending on user feedback and bug reports.

New features and enhancements

• mkvmerge: AVC/H.264 packetizer (framed): access unit delimiter NALUs will now be removed. Implements #2173.

Bug fixes

• mkvmerge: AVC/H.264 parser: when fixing the bitstream timing information mkvmerge will now use exact representations of the desired field duration if possible. For example, when indicating 50 fields/second num_units_in_tick is set to 1 and time_scale to 50 instead of 5368709 and 268435456. Part of the fix for #1673.
• mkvmerge: AVC/H.264 parser: mkvmerge no longer assumes that encountering sequence parameter set or picture parameter set NALUs signal the start of a new frame. Fixes #2179.
• mkvmerge: AVC/H.264 packetizer (framed): when mkvmerge is told to fix the bitstream timing information, it will now update all SPS NALUs, not just the ones in the AVCC. Part of the fix for #1673.
• mkvmerge: MPEG TS reader: TS packet payloads will only be treated as PES packets if the payload actually starts with a PES start code. The prior behavior led to wrong timestamps and potentially broken frame data. Fixes #2193.
• mkvmerge: MPEG TS reader: mkvmerge will now drop incomplete PES packets as soon as an error is detected in the transport stream instead of passing the incomplete frame to the packetizer. An error is assumed either if the transport_error_indicator flag is set or if the value of the continuity_counter header field doesn't match the expected value. Fixes #2181.
• mkvmerge: Opus: when re-muxing Opus from Matroska mkvmerge will now write "block duration" elements for all block groups where a "discard padding" is set, too. Fixes #2188.
• mkvmerge: SRT reader: mkvmerge can now handle SRT files with timestamps without decimal places (e.g. 00:01:15 instead of 00:01:15.000).
• mkvmerge: read buffer I/O class: the class could get out of sync regarding the file position of the underlying file I/O class causing wrong data to be returned on subsequent read operations. One result was that trying to identifying MPLS files that refer to very short M2TS files caused mkvmerge to segfault.
• mkvmerge: multiplexer core: if there's a gap in audio timestamps, a new block group/lace will be started for the first frame after each gap. Before the fix the frame after the gap was often stored in the previous block group causing the gap to be in the wrong place: at the end of that block group. Fixes #1700.
• mkvextract: AVC/H.264: if two consecutive IDR frames with the same idr_pic_id parameter and no access unit delimiters are found between them, mkvextract will insert an access unit delimiter in order to signal the start of a new access unit. Fixes #1704.
• MKVToolNix GUI: update check dialog: Markdown links will now be converted to clickable links. Fixes #2176.
• build system: fixed a race condition when creating new directories if rake is run with -jN in newer versions of Ruby/rake. Fixes #2194.

Build system changes

• cmark, the CommonMark parsing and rendering library in C, is now required when building the GUIs.

Version 19.0.0 "Brave Captain" 2017-12-17

Important notes

• The MKVToolNix project now contains a Code of Conduct.
• The MKVToolNix project's source code repository, bug tracker and wiki have been moved to GitLab.

New features and enhancements

• mkvmerge: splitting by duration, by timestamps or by timestamp-based parts: mkvmerge will now consider the first key frame within 1ms of the requested value to be eligible for splitting.
• MKVToolNix GUI: the GUI will now save and restore the widths of columns in tree and list views. Implements #2057.
• MKVToolNix GUI: header editor: when closing or reloading a modified file, the GUI will now focus the first element that's been modified before asking the user for confirmation regarding discarding unsaved changes.

Bug fixes

• mkvmerge: fixed reading text files encoded in UTF-16 order UTF-32 that have different forms of line endings (new lines, carriage returns or a mix of both). Fixes #2160.
• mkvmerge: MP4 reader: fixed mkvmerge's interpretation of edit list entries with segment_duration == 0 when there's more than one edit list entry. In that case mkvmerge was reading the whole content more than once. Fixes #2152.
• mkvmerge, GUI's multiplexer: MIME types: added the font top-level media types from RFC 8081. This means that the following new MIME types for fonts can be used: font/ttf, font/otf, font/woff and font/woff2.
• mkvmerge: MPEG transport stream reader: fixed slow speed on Windows due to lack of buffering.
• mkvextract: fixed slow track extraction speed on Windows due to lack of buffering. Fixes #2166.
• MKVToolNix GUI: multiplexer: changing the "subtitle/chapter character set" drop-down was ignored when the selected track was a chapter track. Fixes #2165.
• MKVToolNix GUI: multiplexer: once a "subtitle/chapter character set" was set for a track it couldn't be changed back to the empty entry (= auto-detection) anymore.
• MKVToolNix GUI: header editor: fixed re-translating several displayed strings when the GUI language is changed if the language the GUI was started with was not English. Fixes #2159.
• MKVToolNix GUI: header editor: whenever a file did not contain a "date" element in its segment information section, the GUI would erroneously ask the user to confirm discarding unsaved changes when closing or reloading the tab. Fixes #2167.
• MKVToolNix GUI: job queue: jobs are now saved when their status changes in addition to when the program exits. Fixes #2168.

Version 18.0.0 "Apricity" 2017-11-18

New features and enhancements

• build system: when building with clang v3.8.0 or newer, configure will no longer restrict optimization flags to -O1 and use -O3 again (older versions of clang suffered from excessive memory usage with higher optimization levels).
• build system: when building with mingw 7.2.0 or newer, configure will no longer restrict optimization flags to -O2 and use -O3 again (older versions of mingw suffered from bugs such as segmentation faults with higher optimization levels).
• build system: stack protection is enabled when building with clang 3.5.0 or newer on all platforms.
• mkvmerge: AVC/H.264 & HEVC/H.265 ES parsers: performance improvements by copying much less memory around.
• mkvmerge: tags: reintroduced a workaround for non-compliant files with tags that do not contain the mandatory SimpleTag element. This workaround was removed during code refactoring in release v15.0.0.
• GUI: multiplexer: the "AAC is SBR/HE-AAC/AAC+" checkbox in the "audio properties" section will be disabled if the functionality is not implemented for the selected track's codec & container.
• GUI: multiplexer: the "reduce to core" checkbox in the "audio properties" section will be disabled if the functionality is not implemented for the selected track's codec. See #2134.

Bug fixes

• mkvmerge: AAC ADTS parser: fixed interpretation of the channel_configuration header element for ADTS files that do not contain a program configuration element: value 7 means 7.1 channels. Fixes #2151.
• mkvmerge: Matroska identification: the date_local and date_utc attributes will only be output if the identified Matroska file actually contains the "date" header field.
• mkvmerge: WebVTT: mkvmerge did not recognize timestamp lines if the hours components were absent. Fixes #2139.
• mkvpropedit, GUI's header editor: the date header field won't be added automatically anymore whenever the segment info section is edited and the date element is either deleted or not present in the first place. Fixes #2143.

Version 17.0.0 "Be Ur Friend" 2017-10-14

Important notes

• The word "timecode" has been changed to "timestamp" everywhere it was used in MKVToolNix. This affects program output (including mkvinfo's), GUI controls, command line parameters (e.g. mkvmerge --timestamp-scale …) and file formats. All programs remain backwards compatible insofar as they still accept "timecode" in all those places (e.g. mkvmerge --timecode-scale …).

  The reason for the change is wrong usage. What both the Matroska specification and MKVToolNix used "timecode" for is normally called a "timestamp" in audio & video domains. A "timecode" on the other hand has a specific meaning. As the Matroska specification is moving towards implementing real timecodes, it will also move towards correcting the verbiage. MKVToolNix is following this change.

• mkvextract's command line interface has been changed to allow extraction of multiple items at the same time. The first argument must now be the source file's name. All following arguments either set the mode (e.g. tracks) or specify what to extract in the currently active mode.

  Those items that were written to the standard output (chapters, tags and cue sheets) are now always written to files instead. Therefore the respective modes require an output file name.

  For example, extracting two tracks, the chapters and the tags can be done with the following command:

  mkvextract input.mkv tracks 0:video.h265 1:audio.aac chapters chapters.xml tags tags.xml

  The old interface (specifying the mode first and the source file name second) remains working and supported. However, it is now deprecated and will be removed at the end of 2018.

New features and enhancements

• mkvmerge: AC-3: during identification regular AC-3 and E-AC-3 tracks will now be identified differently for most container formats (exception: AVI, Real Media, Ogg/OGM). The codec will be reported as AC-3 for regular AC-3 and as E-AC-3 for E-AC-3 tracks instead of the combined AC-3/E-AC-3.
• mkvextract: the command line interface has been changed to allow extraction of multiple items at the same time. See section "Important notes" for details.

Bug fixes

• mkvmerge: AAC ADTS parser: mkvmerge will now parse the program_config_element if it is located at the start of an AAC frame in order to determine the actual number of channels. This overrides invalid channel configurations in the ADTS headers, for example. Fixes #2107.
• mkvmerge: fixed AC-3 being misdetected as encrypted MPEG program streams under certain conditions.
• mkvmerge: Dirac: under certain conditions (e.g. only muxing a single Dirac track without any other tracks) mkvmerge was always setting the pixel width & height to 123. The frame rate was wrong, too.
• mkvmerge: E-AC-3 in Matroska: if AC-3 cores and their corresponding E-AC-3 extension are located in two different Matroska blocks, then mkvmerge will now re-assemble them into a single block and only use the first block's timestamp.
• mkvmerge: SRT reader: fixed calculating the duration of entries starting with at a negative timestamp.
• mkvmerge: VC-1: under certain conditions (e.g. only muxing a single VC-1 track without any other tracks) mkvmerge was always setting the pixel width & height to 123. The frame rate was wrong, too. Fixes #2113.
• mkvmerge: command line options: an error message will be output if the single-value-form of the --sync option is used and it isn't a number (e.g. --sync 0:asd). Fixes #2121.
• mkvpropedit, GUI's header editor: both programs will now show proper error messages instead of crashing when certain kinds of data corruption is found when reading a file. Fixes #2115.

Version 16.0.0 "Protest" 2017-09-30

New features and enhancements

• mkvmerge: MP4 reader: added support for Vorbis. Implements #2093.

Bug fixes

• configure: the checks for libEBML and libMatroska have been fixed to require libEBML 1.3.5 and libMatroska 1.4.7 as intended.
• mkvmerge: AAC reader: mkvmerge will now emit an error message for AAC files whose header fields imply a sampling frequency or number of channels of 0. See #2107.
• mkvmerge: AVC/H.264 ES parser: fixed the calculation of reference information for P and B frames. This also fixes some P frames being marked as B frames and vice versa.
• mkvmerge: AVC/H.264 ES parser: only non-key frames that have the NALU header field nal_ref_idc set to 0 will be marked as "discardable" in SimpleBlock elements. Other half of the fix for #2047.
• mkvmerge: HEVC/H.265: the generation of the HEVCC structure stored in CodecPrivate was wrong in two places: 1. the position of the number of sub-layers was swapped with reserved bits and 2. the VPS/SPS/PPS/SEI lists did not start with a reserved 1 bit.
• mkvmerge: output: the doc type version will be set at least to 2 if certain elements are written (CodecState, CueCodecState, FlagInterlaced).
• mkvmerge: output: the track header attributes MinCache and MaxCache will not be written anymore. Fixes #2079.
• mkvmerge: Matroska reader: the "key" and "discardable" flags of SimpleBlock elements will be kept as they are. Partial fix for #2047.
• mkvmerge: Matroska reader: if present in the file, the "white colour coordinate x" track header attribute was written to both "white colour coordinate x" and "white colour coordinate y" in the output file.
• mkvmerge: Opus output: mkvmerge will now put all frames with discard padding into their own block group. Fixes #2100.
• MKVToolNix GUI: header editor: removed the check for external modification when saving the file. Fixes #2097.
• MKVToolNix GUI: job queue: fixed calculation of total progress when automatic removal of completed is enabled. Fixes #2105.

Build system changes

• libEBML v1.3.5 and libMatroska v1.4.8 are now required. In fact v15.0.0 already requires libEBML v1.3.5 and libMatroska v1.4.7 but did not include proper version checks for them (nor was there a NEWS.md entry for the new libMatroska requirement). New is the requirement for libMatroska v1.4.8 due to it fixing writing block groups for tracks with the track number 128 (see #2103).

Version 15.0.0 "Duel with the Devil" 2017-08-19

Important notes

• mkvmerge, mkvpropedit, GUI's header and chapter editors: the programs will no longer add most missing Matroska elements that are mandatory but have a default value in the Matroska specification (e.g. the TagLanguage element with a value of und if it isn't present in its SimpleTag parent). Due to this change libEBML v1.3.5 is now required.

New features and enhancements

• MKVToolNix GUI: multiplex tool: added a new entry to the "source files" context menu labeled "Set destination file name from selected file's name". It will force the GUI to consider the selected file to be the reference for automatically setting the file name, no matter which file was originally added as the first file. It will also force setting the destination file name once if automatic destination file name generation is turned off in the preferences. Implements part of #2058.
• MKVToolNix GUI: multiplex tool: added an option in the preferences on "Multiplexer" → "Output" labeled "Only use the first source file that contains a video track". If enabled, only source files containing video tracks will be used for setting the destination file name. Other files that are added are ignore. Implements the rest of #2058.
• MKVToolNix GUI: header editor: added support for editing the video colour attributes. Implements the second half of #2038.
• MKVToolNix GUI: header editor: added support for the "video projection" track header attributes. Part of the implementation of #2064.
• MKVToolNix GUI: job queue: selected jobs can now be move up and down by pressing the Ctrl+Up and Ctrl+Down keys. Additionally, push buttons to move them up & down are shown if the corresponding option is enabled in the preferences. Implements #2060.
• mkvmerge: added support for the "video projection" track header attributes. Part of the implementation of #2064.
• mkvinfo: added support for the "video projection" track header attributes. Part of the implementation of #2064.
• mkvpropedit: added support for editing the video colour attributes. Implements one half of #2038.
• mkvpropedit: added support for the "video projection" track header attributes. Part of the implementation of #2064.

Bug fixes

• all: selecting the program's language (e.g. via the --ui-language command-line option or via the GUI's preferences) did not work on Linux & Unix if the LANGUAGE environment variable was set and didn't include the desired language. Fixes #2070.
• MKVToolNix GUI: removed the keyboard shortcuts for switching between the different tools (e.g. Ctrl+Alt+1 for the multiplexer). They overlapped with basic functionality on keyboards that use an AltGr key, e.g. German ones, where AltGr+7 emits {. As AltGr+key is implemented as Ctrl+Alt+key under the hood, this means that AltGr+7 is really Ctrl+Alt+7 which the GUI now took to mean "switch to the job queue" instead of "insert {". Fixes #2056.
• MKVToolNix GUI: header editor: after saving the file the GUI wasn't updating its internal file modification timestamp. That lead to the GUI wrongfully claiming that the file had been modified externally when the user wanted to save the file once more, requiring a reload of the file losing all modifications made since saving the first time.
• mkvmerge: DTS handling: some source files provide timestamps for audio tracks only once every n audio frames. In such situations mkvmerge was buffering too much data resulting in a single gap in the timestamps of one frame duration after frame number n - 1 (the second audio timestamp read from the source file was used one output frame too early). Fixes #2071.
• mkvinfo: fixed a null pointer dereference if an EbmlBinary element's data pointer is a null pointer. Fixes #2072.

Build system changes

• configure: added option --disable-update-check. If given, the code checking online for available updates will be disabled. The update check is enabled and included in the GUI by default.
• libEBML v1.3.5 is now required.

Other changes

• mkvmerge: the option --colour-matrix has been renamed to --colour-matrix-coefficients in order to match the specification more closely. The old option name will continue to be recognized as well.

Version 14.0.0 "Flow" 2017-07-23

New features and enhancements

• mkvmerge: AAC: implemented support for AAC with 960 samples per frame. Implements #2031.
• mkvmerge: identification: if the encoding/character set of a text subtitle track is known (e.g. because a byte order mark is present in the file), then it will be output during identification as the encoding property. Implements mkvmerge's part of #2053.
• mkvmerge: WAV reader: added support for Wave64 files. Implements #2042.
• mkvmerge, mkvpropedit, MKVToolNix GUI (chapter editor): added support for chapters in WebM files that is spec-compliant by removing all tag elements not supported by the WebM spec. Implements #2002.
• mkvpropedit: added support for tags in WebM files that is spec-compliant by removing all tag elements not supported by the WebM spec.
• MKVToolNix GUI: multiplexer: if the encoding/character set of a subtitle track cannot be changed, the GUI will deactivate the "subtitle character set" drop-down box and ignore changes to it when multiple tracks are selected. Additionally, if the track's encoding is known and cannot be changed (e.g. due to a byte order mark in the file), that encoding will be selected in the drop-down box automatically. Both changes signal to the user that she doesn't have to take care of the encoding herself. Implements the GUI's part of #2053.
• MKVToolNix GUI: chapter editor: added a function to the "additional modifications" dialog for calculating and setting the end timestamps. Implements #1887.
• MKVToolNix GUI: changed the shortcuts for switching between the various tools from Alt+number (e.g. Alt+1 for the multiplexer tool) to Ctrl+Alt+number in order to avoid clashing with Windows' input method for arbitrary characters (pressing and holding Alt and typing the codepoint on the number pad). Implements #2034.
• MKVToolNix GUI: added a "Window" menu and entries with shortcuts for selecting the next (Ctrl+F6) respectively previous tab (Ctrl+Shift+F6) in the current tool. Implements #1972, #2032.
• MKVToolNix GUI: on Windows the GUI will now determine the default font to use by querying Windows for the default UI/message box font instead of using the hardcoded Segoe UI. This might fix issues such as #2003 (unverified).
• translations: added a Romanian translation of the programs by Daniel (see AUTHORS).

Bug fixes

• mkvmerge: AVC/H.264 parser: fixed wrong frame order & timestamp calculation in certain situations when SPS (sequence parameter sets) or PPS (picture parameter sets) change mid-stream. Fixes #2028.
• mkvmerge: HEVC/H.265 parser: fixed wrong frame order & timestamp calculation in certain situations when SPS (sequence parameter sets) or PPS (picture parameter sets) change mid-stream. This is the HEVC/H.265 equivalent of #2028.
• mkvmerge: MPEG-1/-2 video: the "remove stuffing bytes" feature introduced in v5.8.0 (feature request #734) was broken. In a lot of situations it did not detect the end of a slice correctly and removed 0 bytes that were actually part of the slice structure. Often there were no visual problems as decoders were able to ignore such errors, but in other cases there are visual artifacts upon decoding. As detecting the slice end properly requires parsing the whole slice structure, this feature has been removed again. Fixes #2045.
• mkvmerge: MPEG PS reader: fixed mkvmerge trying to handle an "end" code the same way as a "program stream map" code.
• mkvmerge: MPEG TS reader: mkvmerge won't emit warnings if the system's iconv library doesn't support the ISO 6937 character set. Fixes #2023.
• mkvmerge: when appending fails the error message details (e.g. "the number of channels differs: 1 and 2") were often not output. Fixes #2046.
• MKVToolNix GUI: multiplex tool: implemented a workaround for a crash that could occur during drag & drop if at least one of the columns is hidden. Fixes #2009.
• MKVToolNix GUI: multiplex tool: appended tracks can no longer be enabled (selected for multiplexing) if the track they're going to be appended to is not enabled. Fixes #2039.
• MKVToolNix GUI: multiplex tool: if the GUI is set to ensure unique output file names, it will now verify that right before starting to multiplex/adding the job to the queue, too. Fixes #2052.
• MKVToolNix GUI: fixed the total progress reverting to 0% instead of staying at 100% when all jobs have finished. This was introduced by the attempt at fixing the computation of the value of total progress bar for multiple jobs running. Fixes #2005.
• configure: fixed DocBook detection if /bin/sh is dash. Patch by Steve Dibb. Fixes #2054.

Build system changes

• Boost: the minimum required version has been bumped to 1.49.0. Earlier releases fail to build on my current systems and will therefore not be supported anymore.
• configure: when looking for the "nlohnmann JSON" include files configure will now try the path "nlohmann/json.hpp" first, "json.hpp" second (only "json.hpp" was tried before). If neither is found, the copy included in the MKVToolNix sources will be used. Fixes #2048.

Version 13.0.0 "The Juggler" 2017-06-25

New features and enhancements

• mkvmerge: MPEG TS reader: information about multiple programs will be output as container properties during verbose/JSON identification. See #1990 for the use case.
• MKVToolNix GUI: multiplex tool: added a column "program" to the tracks list. Certain container types such as MPEG transport streams can contain multiple programs. The new column will contain the service name (think TV station names such as "arte HD") for such streams. Implements the GUI part of #1990.
• MKVToolNix GUI: multiplex tool: the dialog asking the user what to do with dropped files (add to current settings, add to new settings etc.) now remembers the previous decision and defaults to it the next time it's shown. Implements #1997.
• MKVToolNix GUI: tabs can now be closed by pressing the middle mouse button. Implements #1998.

Bug fixes

• mkvmerge: MP4 reader: MPEG-1/2 video read from MP4 files was written with an invalid codec ID (e.g. V_MPEG7) in certain cases. Fixes #1995.
• mkvmerge: MPEG PS reader: made the file type detection less strict so that garbage at the start of the file doesn't prevent detection. Fixes #2008.
• mkvmerge: MPEG PS reader: (E-)AC-3 tracks were not detected if the very first packet for that track didn't contain a full (E-)AC-3 frame. Fixes #2016.
• mkvmerge: MPEG TS reader: fixed mkvmerge not detecting all tracks in MPEG transport streams containing multiple programs. Fixes one part of #1990.
• mkvmerge: MPEG TS reader: fixed track content being broken for some tracks read from MPEG transport streams containing multiple programs. Fixes another part of #1990.
• mkvmerge: JSON identification: the stream_id and sub_stream_id track properties were output as hexadecimal strings instead of unsigned integers. As the ts_pid track property was only used for MPEG transport streams, its value is now output as stream_id instead, and the ts_pid property has been removed. The JSON schema version has been bumped to 8 due to this change.
• mkvmerge: fixed a crash when appending video tracks where one track has a CodecPrivate member and the other one doesn't.
• mkvmerge: track statistics tags: the NUMBER_OF_BYTES tag is supposed to contain the number of bytes in a track before any of the content encoding schemes such as lossless compression is applied; however, mkvmerge was wrongfully using the number of bytes after the schemes had been applied. Fixes #2022.
• mkvmerge: CLPI & MPLS parsers: MPLS and CLPI files with version number 0300 as used on Ultra HD Blu-ray Discs are now accepted as well. Fixes #2010.
• mkvpropedit: fixed a crash when the selector used for --tags is invalid.
• MKVToolNix GUI: fixed computation of value of total progress bar for multiple jobs running. Fixes #2005.
• MKVToolNix GUI: multiplexer, adding new attachments: when the GUI checks if there's an attachment with the same name it will now disregard disabled attached files. Fixes #2001.
• Debian/Ubuntu packaging: during a dpkg-buildpackage run the test suite was failing when a non-English locale was active and MKVToolNix packages had already been installed. Fixes #2011.

Version 12.0.0 "Trust / Lust" 2017-05-20

New features and enhancements

• MKVToolNix GUI: the key combination Ctrl+Shift+Space will now toggle the selection of the current item in all tree views where multiple selections are allowed. Implements #1983.
• MKVToolNix GUI: chapter editor: added the extension *.cue (for cue sheet files) to the "open chapter file" dialog.
• mkvmerge: cue sheet parser: if the cue sheet contains a non-empty TITLE entry and if no other segment title has been set yet, then the segment title will be set to the cue sheet's TITLE value. Implements #1977.
• mkvmerge, MKVToolNix GUI (multiplexer): added an option --no-date that prevents the "date" field from being written to the segment information headers. Implements one half of #1964.
• mkvpropedit, MKVToolNix GUI: header editor: added support for editing the "date" segment information field. Implements the other half of #1964.

Bug fixes

• MKVToolNix GUI: preferences → job actions, type "play audio file": the GUI will no longer clear the audio file name input if the user aborts the audio file selection dialog.
• MKVToolNix GUI: preferences → job actions, type "play audio file", on Windows: the default "play audio" action was pointing to the wrong directory. Existing configurations with such a wrong path will be fixed automatically upon starting the GUI. Fixes #1956.
• mkvmerge: HEVC/H.265 parser: fixed the superfluous copying of the bitstream_restriction_flag and its dependent flags in the VUI parameters of the sequence parameter sets if the timing information is present, too. This fixes #1924 properly, and it also fixes #1958.
• mkvmerge: MPEG TS reader, AAC parser: the MPEG TS reader will now force the AAC parser to use the multiplex mode that the MPEG TS reader has detected (e.g. LOAS/LATM). This prevents the AAC packetizer from mis-detecting it in its own attempt to identify the mode. Fixes #1957.
• mkvmerge: MPEG TS reader: valid MPEG transport streams that start with an H.264/H.265 start code (e.g. a file created by cutting at an arbitrary position) were not recognized as a supported file type.
• mkvmerge: MPEG TS reader: fixed a potential read access from invalid memory addresses in the code parsing the program map table (PMT).
• mkvmerge: MPEG TS reader: if packets are encountered that belong to a PID not listed in the program map table (PMT), mkvmerge will attempt to determine their type and codec from the content. This supported content types are AAC (ADTS only) and AC-3. Fixes #1980.
• mkvmerge: MP4 reader: fixed finding and parsing the colr atom if there are more than one video extension atoms and the colr atom is not the first one.
• mkvmerge: MP4 reader: the nclx colour type of the colr atom is now recognized, too (as defined by ISO/IEC 14496-12, "ISO base media format").
• configure: fixed configure aborting if a moc, uic, rcc or qmake binary is found, but the binary's version is too old. Fixes #1979.

Version 11.0.0 "Alive" 2017-04-22

New features and enhancements

• mkvmerge: FLAC reader: added support for handling embedded pictures as attachments. Implements #1942.
• mkvmerge: MP4 reader: merged pull request #1804 adding support for parsing the "COLR" atom and including its values as track headers.
• MKVToolNix GUI: watch jobs: the user can now have the GUI execute an action once as soon as the current job or the whole queue finishes. The actions are the same ones that can be configured to be run automatically after job or queue completion.
• MKVToolNix GUI: implemented several built-in actions that can be executed either on special events or once via the "watch jobs" tool. These are: playing an audio file (implemented for all operating systems); hibernating, sleeping and shutting down the computer (only implemented for Windows and for Linux systems using systemd).
• MKVToolNix GUI: multiplex tool: added a new option for what to do after starting to multiplex/adding to the job queue: "close current settings" will close the current multiplex settings without opening new ones.

Bug fixes

• mkvmerge: AAC parser: fixed mis-detection of certain data as valid ADTS AAC headers resulting in memory allocation failures. Fixes #1941.
• mkvmerge: AVC/H.264 parser: mkvmerge will now ignore bogus timing information in the sequence parameter sets (values indicating more than 100000 progressive frames per second). Fixes #1946.
• mkvmerge: AVC/H.264 & HEVC/H.265 parsers: all trailing zero bytes will now be removed from NALUs. Fixes #1952.
• mkvmerge: HEVC/H.265 parser: fixed copying the bitstream_restriction_flag and all dependent fields in the VUI parameters of the sequence parameter sets. Fixes #1924.
• mkvmerge: HEVC/H.265 parser: fixed the calculation of the number of parameter set arrays in the HEVCC data structure stored in CodecPrivate. Fixes the video-related part of #1938.
• mkvmerge: HEVC/H.265 parser: fixed writing superfluous and uninitialized bytes at the end of the HEVCC data structure stored in CodecPrivate. Another fix for the video-related part of #1938.
• mkvmerge: HEVC/H.265 parser: fixed the assumption that the HEVCC data structure always includes arrays for all parameter set types (VPS, SPS, PPS and SEI), and that the order is always VPS → SPS → PPS → SEI. Instead now only the arrays actually present are parsed, and they can be in any order. This fixes mkvinfo's output for Matroska files created from files such as the one from #1938.
• mkvmerge: AVC/H.264 packetizer: when reading a framed track (e.g. from Matroska or MP4 files), specifying a default duration as fields (e.g. 50i) would result in double the actual duration for each frame and the track's default duration header field. Fixes #1916.
• mkvmerge: Matroska reader: invalid track language elements are now treated as if they were set to und = "undetermined". See #1929 for context.
• mkvmerge: MPEG TS reader, AAC: mkvmerge will now require five consecutive AAC headers with identical parameters before track type determination is considered valid. This avoids false positives and consequently wrong track parameters. Fixes the audio-related part of #1938.
• mkvmerge: fixed an endless loop in certain circumstances when splitting by parts or parts-frames and the start of the file is discarded. Fixes #1944.
• MKVToolNix GUI: multiplexer tool: the "show command line" dialog will no longer include the mkvmerge executable's location as the first argument for the two "MKVToolNix option files" escape modes. Fixes #1949.
• MKVToolNix GUI, header editor: empty track language elements are now treated the same as those set to invalid ISO 639-2 codes: as if they were set to und = "undetermined". See #1929 for context.

Build system changes

• bug fix: configure now looks for the strings binary by using the AC_CHECK_TOOL() autoconf macro. That way it will be found in multiarch setups, too. Fixes #1923.
• bug fix: the environment variable USER_CXXFLAGS was accidentally removed from the compiler flags in release 9.8.0. It's been re-added. Fixes #1925.
• The .desktop files have been renamed to org.bunkus.mkvtoolnix-gui.desktop and org.bunkus.mkvinfo.desktop. This allows Wayland compositors to associate the correct icons with running applications for e.g. task switchers. Fixes #1948.
• Qt's multimedia component is required for compilation of the GUIs since version 11.0.0.

Version 10.0.0 "To Drown In You" 2017-03-25

New features and enhancements

• mkvmerge: AVC/H.264 parser: mkvmerge will now drop all frames before the first key frame as they cannot be decoded properly anyway. See #1908.
• mkvmerge: HEVC/H.265 parser: mkvmerge will now drop all frames before the first key frame as they cannot be decoded properly anyway. See #1908.
• mkvmerge: HEVC/H.265 parser: added a workaround for invalid values for the "default display window" in the VUI parameters of sequence parameter sets. Fixes #1907.

Bug fixes

• mkvmerge: MP4 reader: fixed track offsets being wrong in certain situations regarding the presence or absence of edit lists ('elst' atoms) & composition timestamps ('ctts' atoms). Fixes #1889.
• mkvmerge: MP4 reader: offsets in "ctts" are now always treated as signed integers, even with version 0 atoms.
• mkvinfo: the timestamps of SimpleBlocks with negative timestamps are now shown correctly.
• mkvmerge: Matroska reader: fixed handling BlockGroups and SimpleBlocks with negative timestamps.
• mkvmerge: MP3 packetizer: the MP3 packetizer will no longer drop timestamps from source containers if they go backwards. This keeps A/V in sync for files where the source was in sync even though their timestamps aren't monotonic increasing. Fixes #1909.
• mkvmerge: AVC/H.264 parser: mkvmerge will now drop timestamps from the source container if no frame is emitted for that timestamp. Fixes #1908.
• mkvmerge: HEVC/H.265 parser: mkvmerge will now drop timestamps from the source container if no frame is emitted for that timestamp. Fixes the HEVC equivalent of the problem with AVC described in #1908.
• mkvextract: SSA/ASS: fixed extraction when the "Format" line in the "[Events]" section contains less fields than the default for SSA/ASS would indicate. Fixes #1913.

Version 9.9.0 "Pick Up" 2017-02-19

New features and enhancements

• GUI: chapter editor: added a character set selection in the preferences for text files. If a character set is selected there, it will be used instead of asking the user when opening text chapter files. Implements #1874.
• GUI: multiplexer: added a column "character set" to the "tracks, chapters and tags" list view showing the currently selected character set for that track. Implements #1873.
• mkvmerge: added an --engage option "all_i_slices_are_key_frames" for treating all I slices of an H.264/AVC stream as key frames in pathological streams that lack real key frames. Implements #1876.
• GUI: running programs after jobs: added a new variable <MTX_INSTALLATION_DIRECTORY> for the directory the MKVToolNix GUI executable is located in.
• mkvmerge: DVB subtitle tracks whose CodecPrivate data is only four bytes long will now be fixed up to the proper five bytes by adding the subtitling type byte.
• mkvmerge: MP4 reader: "ctts" version 1 atoms are now supported.

Bug fixes

• mkvmerge: AC-3 handling: some source files provide timestamps for audio tracks only once every n audio frames. In such situations mkvmerge was buffering too much data resulting in a single gap in the timestamps of one frame duration after frame number n - 1 (the second audio timestamp read from the source file was used one output frame too early). Fixes #1864.
• mkvmerge: MP4 reader: mkvmerge was only reading a small part of MP4 DASH files where the first "moov" "mdat" atoms occur before the first "moof" atom. This is part of the fix for #1867.
• mkvmerge: MP4 reader: edit list ("edts" atoms) that are part of the "moof" atoms used in MP4 DASH files weren't parsed. Instead the edit lists from the main track headers inside the "moov" atom were used. This is part of the fix for #1867.
• mkvmerge: MP4 reader: when an MP4 DASH file contained both normal chunk offset table ("stco"/"co64" atoms) in their regular "moov" atoms, a sample-to-chunk table ("stsc" atom) whose last entry had a "samples per chunk" count greater than 1 and DASH "trun" atoms, then mkvmerge was calculating wrong positions the frame content. This is part of the fix for #1867.
• mkvmerge: MP4 reader: mkvmerge couldn't deal with the key frame index table having duplicate entries. The result was that only key frames up to and including the first duplicate entry were marked as key frames in the output file. All other frames weren't, even though some of them were referenced from the key frame table after the first duplicate entry. This is part of the fix for #1867.
• mkvmerge: MP4 reader: when an MP4 file contained more than one copy of the "moov" atom (the track headers etc.), mkvmerge was parsing them all adding tracks multiple times. Fix for #1877.
• mkvmerge: MP4 reader: fixed an integer overflow during the timestamp calculation leading to files with wrong timestamps. Such files could not be played back properly by most players. Fixes #1883.
• mkvmerge: MPEG TS reader: if the PMT lists a DVBSUB track, mkvmerge will now recognize it without having to find a packet for it within the probed range.
• mkvmerge: splitting by parts (both the "timestamps" and the "frames" variants): fixed the calculation of track statistics tags. When calculating the duration the skipped portions weren't taken into account leading to a too-high duration. As a consequence the BPS tag (bits per second) was wrong, too. Fixes #1885.
• mkvmerge: reading files with DVB/HDMV TextSV subtitle tracks with invalid CodecPrivate caused mkvmerge to abort with an error from boost::format about the format string not having enough arguments. Fixes #1894.
• mkvmerge: fixed misdetection of certain AC-3 files as MP3 files which led to an error message that "the demultiplexer could not be initialized".
• mkvmerge: fixed huge memory consumption when appending big Matroska files with sparse tracks (e.g. forced subtitle tracks). The Matroska reader will now queue at most 128 MB of data. Fixes #1893.
• mkvmerge: MP4 reader: the timestamps of all multiplexed tracks will now be 0-based properly.
• mkvmerge: MP4 reader: the DTS-to-PTS offsets given by the "ctts" atoms are now applied for all tracks containing a "ctts" atom, not just H.264 & H.265 tracks.

Build system changes

• Up to and including release 9.8.0 the man pages and their translations came pre-built and bundled with the source code. Those pre-built files have now been removed and must be built during the build process. Therefore the tool "xsltproc" and the DocBook XSL stylesheets for man pages are now required dependencies. Additionally the tool "po4a" must be installed for the translated man pages to be built and installed, though this is optional.

  In order to facilitate finding the new requirements new options have been added to confiure: "--with-xsltproc=prog", "--with-docbook-xsl-root=dir", "--with-po4a=prog" and "--with-po4a-translate=prog.

• pugixml detection will be attempted via "pkg-config" first. If that fails, "configure" will fall back to the previous method of trying just to compile and link a test program with the standard include and library locations. Implements #1891.

Version 9.8.0 "Kuglblids" 2017-01-22

Important notes

• build system: the included version of the "drake" build tool has been removed. Since Ruby 2.1 rake has supported parallel builds, too. The MKVToolNix build system has been adjusted to enable parallel builds by default.

New features and enhancements

• mkvmerge: VobSub in Matroska: mkvmerge will now create and use a default index for VobSub tracks read from Matroska files that are missing their CodecPrivate element (which normally contains said index). Implements #1854.
• GUI: added checks for several common problems with the installation. These checks will be executed when the GUI starts, and any problems will be reported to the user.
• mkvmerge: added the ISO 639-2 language codes "qaa" and "qad" (both are titled "reserved for local use") as both are used often in France. See #1848 for more information.
• mkvmerge: the JSON identification result now includes a track's codec delay if set (only for Matroska source files). The JSON schema version has been bumped to 6.
• mkvmerge: MPEG TS: added a workaround for files where the subtitle packets are multiplexed properly, but where their timestamps are way off from the audio and video timestamps. Implements #1841.
• mkvmerge: added support for Digital Video Broadcasting (DVB) subtitles (CodecID S_DVBSUB). They can be read from MPEG transport streams and from Matroska files. Implements #1843.

Bug fixes

• mkvmerge: MP4 reader: when an MP4 file contained fewer entries for timestamps than frames (which they never should), mkvmerge would use 0 as the timestamp for all the other frames. This resulted in effects such as the last frame of an output file having a timestamp of 0 and in split files having a much longer duration than they should have. Fixes #1847.
• GUI: the cache cleanup process that's run automatically when the GUI starts no longer blocks file identification until it is finished. Additionally the process will only be run once per release of MKVToolNix. Fixes #1860.
• GUI: certain failures during file identification that can be traced to broken installations (e.g. mkvmerge being too old) won't be stored in the cache anymore. Without this fix the GUI would still use the cached failed identification result even though the underlying might have already been fixed.
• mkvmerge: fixed that the error message "not enough space on disk" was shown twice on some operating systems. Fixes #1850.
• mkvmerge, Matroska: if a codec delay is set for a track in the input file, it is kept. Fixes #1849.
• GUI: multiplexer: changing default values in the preferences (e.g. the default track language to set) did not affect files whose identification results had already been cached.
• mkvmerge, MP4: fixed detection of MP3 audio when the object type ID in the ESDS signals MP2 and the track headers have invalid values for number of channels or sampling frequency. Fixes #1844.

Build system changes

• nlohman json-cpp: configure now looks for a system-wide installed version of the nlohmann json-cpp header-only library. If one is found, it is used; otherwise the included version will be used. Implements #1858.
• If MKVToolNix is built with rake v10.0.0 or newer, its "multitask" feature will be turned on allowing automatic parallel builds.
• CURL is no longer used by MKVToolNix and is therefore not required for building anymore.

Other changes

• GUI: the update check now uses Qt's networking classes instead of CURL.
• The command line option "--check-for-updates" has been removed, even though the deprecation warning in release 9.7.0 stated that it would be removed in 2018.

Version 9.7.1 "Pandemonium" 2016-12-27

Bug fixes

• MKVToolNix GUI: multiplex tool bug fix: under certain circumstances the GUI was creating invalid JSON files when starting to multiplex resulting in an error message ("JSON option files must contain a JSON array consisting solely of JSON strings").

Version 9.7.0 "Numbers" 2016-12-27

Important notes

• Deprecation warning: Several options and features are now deprecated and will be removed at the start of 2018. These are: - mkvmerge: the options "--identify-verbose", "--identify-for-gui", "--identify-for-mmg" and "--identification-format verbose". Please convert existing users of these interfaces to use mkvmerge's JSON identification output which can be invoked with "--identification-format json --identify …". - all command line tools: the old, proprietary format used for option files. Please convert users of this interface to the new JSON option file format introduced in this release. - all command line tools: the option "--check-for-updates" (the GUI will keep its online check for updates, though). There is and will be no equivalent interface in the tools themselves. Users of this interface can switch to retrieving the information about available updates directly from the MKVToolNix website. The information is available as JSON and XML files at the following URLs: https://mkvtoolnix.download/latest-release.json.gz https://mkvtoolnix.download/latest-release.xml.gz

New features and enhancements

• mkvmerge: enhancement: added a new track property in JSON/verbose identification mode called "multiplexed_tracks". It's an array of track IDs that describe which of the tracks mkvmerge reports as separate ones were originally part of the same source track (e.g. TrueHD+AC-3 in a single track in MPEG transport streams). Implements #1835.
• mkvmerge: added support for skipping APE(v2) tags in TTA files.
• mkvextract: enhancement: added support for reporting progress in --gui-mode the same way mkvmerge does.
• all: new feature: all command line tools can now read JSON-formatted option files. Such a file's name must have an extension of ".json" (e.g. "mkvmerge @options.json"). Its content must be a valid JSON array consisting solely of JSON strings.
• MKVToolNix GUI: header editor & job output enhancement: added menu entries for saving or closing all open tabs.
• MKVToolNix GUI: chapter editor enhancement: added menu entries for saving or closing all open tabs.
• mkvmerge: MPEG TS/MPLS reader improvements: added support for subtitle tracks that are referenced from the MPLS file as sub-paths in other M2TS files than the main tracks.
• MKVToolNix GUI: multiplexer enhancement: the file identification process has been re-written to be properly multi-threaded. This allows the user to continue working with the GUI while e.g. playlists from a Blu-ray are identified.
• mkvmerge: enhancement: mkvmerge can now handle Blu-ray playlists from the "BACKUP" sub-directory of a Blu-ray disc.
• MKVToolNix GUI: new multiplexer feature: added a menu entry for copying the title to the destination file name. It will replace the destination file's base name but keep its path & extension.
• MKVToolNix GUI: new multiplexer feature: all positive file identification results will now be cached between runs. This speeds up adding the same file a lot, especially when scanning the same Blu-ray playlists again. Cached results are invalidated automatically with newer MKVToolNix releases or when the source file changes.
• MKVToolNix GUI: multiplexer enhancement: when the user tries to add one of the main Blu-ray index files (index.bdmv, MovieObject.bdmv) the GUI will automatically scan the Blu-ray playlist files and offer them for selection.
• MKVToolNix GUI: multiplexer enhancement: tracks, chapters, tags, attachments not selected for multiplexing will be displayed the same way as other disabled controls. Implements #1819.

Bug fixes

• mkvmerge: bug fix: when using --track-order without specifying all tracks, the track numbers could end up in a way the user did not expect. Now mkvmerge will always assign track numbers for those tracks that are listed in --track-order first. The other tracks are assigned numbers afterwards. Fixes the second part of #1832.
• mkvmerge: bug fix: when reading Matroska files the movie title was always taken from the first Matroska source file, even if that file didn't have a title set. Fixes one part of #1832.
• MKVToolNix GUI: re-worked the startup code not to use lock files when trying to open a socket for communicating with an already-running instance. This aims to prevent situations with stale lock files not being cleaned up and the GUI not starting anymore as a result. This might fix or prevent issues like #1805.
• mkvmerge: teletext subtitle bug fix: fixed the handling of DVB teletext subtitles signaled with data unit ID 0x02 and that contain pages from multiple magazines.
• mkvmerge: bug fix: files smaller than 4 bytes were wrongly identified as MPEG transport streams.
• mkvmerge: bug fix: the MPEG transport stream reader was using an outdated format for the "CodecPrivate" element for HDMV TextST subtitles. This has been updated to the current format which only contains the "dialog style element". Existing Matroska files using this outdated scheme can be fixed by running them through mkvmerge v9.6.0 itself or any later release as the old format is automatically converted to the new one when it is read from Matroska files.

Build system changes

• build system: building the GUI components of MKVToolNix now requires Qt v5.3.0 or newer.
• build system: MKVToolNix now requires a compiler that supports the following features of the C++14 standard: "std::make_unique()", "digit separators", "binary literals" and "generic lambdas". For the GNU Compiler Collection (gcc) this means v4.9.x or newer; for clang it means v3.4 or newer.

Version 9.6.0 "Slave To Your Mind" 2016-11-29

New features and enhancements

• mkvmerge & mkvextract: added support for HDMV TextST subtitles.
• MKVToolNix GUI: multiplexer enhancement: added a column "source file's directory" to the track list. Implements #1809.
• MKVToolNix GUI: multiplexer enhancement: added an option for selecting all tracks of the currently selected source files in the source file context menu. Inspired by #1809.
• MKVToolNix GUI: new feature: added options in the preferences to only show the list of often used languages/country codes/character sets in their respective selections instead of both the often used and the full list. Implements #1796.

Bug fixes

• mkvextract: VobSub bug fix: mkvextract will add a "langidx" line to the .idx file upon extraction. Fixes #1810.
• MKVToolNix GUI: job output tool bug fix: the button for acknowledging warnings & errors wasn't properly disabled when the user used outside methods of acknowledging them (e.g. via the menu or via the job queue). Fixes #1802.
• mkvmerge: MPLS parser bug fix: fixed reading the "in" & "out" timestamps for "play items". This bug resulted in mkvmerge not reading the correct range from the referenced M2TS file under certain rare circumstances.
• mkvmerge: bug fix: mkvmerge was entering endless loops under certain conditions when appending files. This was a regression introduced with the fix to #1774 (using very large --sync values causing mkvmerge to abort).

Version 9.5.0 "Quiet Fire" 2016-10-16

New features and enhancements

• mkvmerge, mkvpropedit, MKVToolNix GUI: added support for the "field order" video track header element.
• mkvinfo: added support for the "field order" video track header element. Patch by James Almer (see AUTHORS).
• MKVToolNix GUI: merge tool enhancement: added menu entries that execute the "close", "save settings", "start muxing" or "add to job queue" action for all currently open tabs.
• MKVToolNix GUI: merge tool enhancement: when dragging & dropping directories the GUI will process all files within those directories recursively instead.
• mkvpropedit, MKVToolNix GUI's header editor: added options to modify the "muxing application" and "writing application" elements in the "segment information" container. Implements #1788.

Bug fixes

• mkvmerge, mkvextract: VobSub handling bug fix: mkvmerge and mkvextract will now update the duration stored in the SPU bitsream with the duration from the container level if it differs at least 1ms. Fixes #1771.
• mkvmerge: H.264 elementary stream handling bug fix: if mkvmerge ever encounters changing SPS or PPS NALUs (ones where their ID has been encountered before with different settings) in the H.264 then it will prepend all following key frames with all currently active SPS and PPS NALUs. This enables playback from arbitrary key frames even if they require other SPS or PPS settings than the ones stored in the AVCC in CodecPrivate. Fixes #1711.
• mkvmerge: MPEG transport stream reader bug fix: fixed the handling of Blu-ray PCM audio with an odd number of channels by removing their alignment bytes.
• mkvmerge: MPEG transport stream reader bug fix: fixed mis-detection of certain H.264 files as MPEG transport streams.
• mkvmerge: WAV reader bug fix: the track properties (channels, sample rate) for DTS and AC-3 in WAV will now be derived from the decoded bitstream headers instead of the WAV file header as the latter is often incorrect.
• mkvmerge: WAV reader bug fix: fixed detection and merging of DTS in WAV that uses the 14-bytes-in-16-bytes packing method.
• mkvmerge: bug fix: The Ogg/OGM reader did not recognize Opus files with comment headers anymore. This was broken by the fix to not require Ogg/OGM files to have comment headers in v9.4.0.

Version 9.4.2 "So High" 2016-09-11

Bug fixes

• mkvmerge: bug fix: AVC & HEVC readers: release v9.4.1 contains a change to both readers so that they will refuse to handle files where the detected pixel width or height is equal to or less than 0. This check was wrong in certain cases causing mkvmerge to reject a file as an unsupported file type. This has been fixed while keeping the constraints on width & height having to be positive.

Version 9.4.1 "Black Rain" 2016-09-11

Important notes

• Note: most of the bugs fixed on 2016-09-06 and 2016-09-07 for issue #1780 are potentially exploitable. The scenario is arbitrary code execution with specially-crafted files. Updating is highly recommended.

Bug fixes

• mkvmerge: bug fix: AVC & HEVC readers: the readers will now refuse to handle files where the detected pixel width or height is equal to or less than 0. Before this fix the muxing process aborted with an assertion inside libMatroska. Fixes the last test case of #1780.
• mkvmerge: bug fix: HEVC parser: fixed another invalid memory access (beyond the end of allocated space). Fixes two test cases of #1780.
• mkvmerge: bug fix: HEVC parser: fixed another invalid memory access (beyond the end of a fixed-size array). Fixes several test cases of #1780.
• mkvmerge: bug fix: MP4 reader: an error message will be printed instead of an uncaught exception when an invalid atom chunk size is encountered during resync. Fixes a test case of #1780.
• mkvmerge: bug fix: AAC reader: fixed mkvmerge throwing an uncaught exception due to the sample rate being 0. Fixes a test case of #1780.
• mkvmerge: bug fix: MP4 reader: fixed an invalid memory access (beyond the end of allocated space). Fixes several test cases of #1780.
• mkvmerge: bug fix: HEVC parser: fixed an invalid memory access (beyond the end of allocated space). Fixes several test cases of #1780.
• mkvmerge: bug fix: fixed an invalid memory access (use after free) during global destruction phase. Fixes several test cases of #1780.
• mkvmerge: bug fix: using very large --sync values (several minutes) with certain container formats was causing mkvmerge to abort muxing. Fixes #1774.

Version 9.4.0 "Knurl" 2016-08-22

New features and enhancements

• mkvmerge: new feature: added support for reading Apple ProRes video from MOV/MP4 files. Patch by Chao Chen (see AUTHORS).
• MKVToolNix GUI: merge tool enhancement: when adding attachments the GUI will check if there are attachments or attached files with the same name as the file to add. If so the GUI will tell the user and ask for confirmation.
• mkvmerge: enhancement: mkvmerge now accepts file names in square brackets for appending files, e.g. "mvkmerge -o out.mkv [ in1.avi in2.avi in3.avi ]" instead of "mkvmerge -o out.mkv in1.avi + in2.avi + in3.avi".
• MKVToolNix GUI: merge tool enhancement: the "select a play list to add" dialog does now contain a column with the number of chapters for each play list found.
• MKVToolNix GUI: job queue enhancement: dragging & dropping a valid .mtxcfg file (either a full job file or one containing only merge settings without the job properties) onto the job queue window will import the dropped .mtxcfg job into the job queue. Rest of the implementation of #1714.
• MKVToolNix GUI: merge tool enhancement: dragging & dropping a job queue .mtxcfg file onto the merge tool or using one as a command line parameter to the mkvtoolnix-gui executable will import the .mtxcfg job into the job queue. Part of the implementation of #1714.
• MKVToolNix GUI: merge tool enhancement: toggling the WebM mode check box will update the output file name's extension automatically.

Bug fixes

• mkvpropedit: bug fix: mkvpropedit will no longer say that it's writing the changes if only attachment changes are specified and none of the specified attachments can be found.
• MKVToolNix GUI: chapter editor bug fix: overly long chapter names don't cause the GUI's window to become overly wide anymore. Fixes #1760.
• mkvmerge: DTS bug fix: if present mkvmerge will use an XLL extension's sample rate information as the sample rate to put into the track headers. Fixes #1762.
• mkvmerge: bug fix: when appending files mkvmerge wasn't starting clusters on video key frame anymore for the first and all following appended files. Fixes #1757.
• mkvmerge: bug fix: VP8 in Ogg: fixed dropping the first frame and the timestamp calculation. Fixes #1754.
• mkvmerge: bug fix: mkvmerge does no longer emit a warning if no comment header packet is found when reading tracks from Ogg/OGM files. See #1754.
• MKVToolNix GUI: merge tool bug fix: the automatic adjustments to the output file name based on the track types selected for muxing and the mechanism for keeping output file names unique had been broken since release v9.3.0. Fixes #1743.

Version 9.3.1 "Mask Machine" 2016-07-14

Bug fixes

• MKVToolNix GUI: merge tool bug fix: the GUI v9.3.0 was often creating an invalid syntax for the --probe-range-percentage parameter for mkvmerge due to uninitialized memory. Fixes #1741.

Version 9.3.0 "Second Sight" 2016-07-13

Important notes

• mkvmerge, mkvextract, MKVToolNix GUI: bug fix: several fixes to the handling of country codes. The list has been updated to reflect the currently valid top level domain country codes. Deprecated codes such as "gb" for "Great Britain" are now mapped to their updated values ("uk" for "United Kingdom" in this case). Fixes #1731.

New features and enhancements

• mkvmerge, MKVToolNix GUI: new chapter generation feature: two new placeholders have been introduced when generating chapters for appended files, <FILE_NAME> and <FILE_NAME_WITH_EXT>. The former will be replaced by the appended file's name without its extension; the latter with its extension. Implements #1737.
• MKVToolNix GUI: merge tool enhancement: when opening a saved configuration (via the menu as well as via drag & drop) the current tab will be replaced if it is empty ( = in the same state it is in right after creating new mux settings). Implements #1738.
• mkvmerge, MKVToolNix GUI: added an option for specifying how much of a MPEG PS or TS file is probed for tracks (--probe-range-percentage). Implements #1734.
• mkvmerge, mkvinfo: new feature: added flags to support the Colour elements in the video tracks of Matroska containers. Users can use those flags to specify the colour space, transfer function, chromaticity coordinates etc. These properties are useful for correct colour reproduction of high dynamic range / wide colour gamut videos.
• MKVToolNix GUI: merge tool enhancement: the default track languages to set can now also be set whenever the language in the source file is 'undefined' ('und'). This is now the default and can be changed back to the old behavior (only set if the source file doesn't contain a language attribute) in the preferences. Implements #1697.
• MKVToolNix GUI: merge tool enhancement: menus have been added to both the "start muxing" and the "add to job queue" buttons. The menus let the user override the preferences regarding clearing merge settings after starting to mux and after adding a job to the queue respectively. Implements #1696.
• mkvmerge: the warning about not being able to determine whether a raw AAC file contains HE-AAC/AAC+/SBR has been removed. Implements #1701.
• MKVToolNix GUI: enhancement: all file names are now displayed with their native path separators (e.g. "C:\some\where\output.mkv" on Windows). Implements #1298, #1456.

Bug fixes

• mkvmerge: bug fix: fixed overly long file type detection in some cases when text subtitle type probing read a lot of data due to there being no carriage returns near the start of the file.
• mkvmerge: WavPack4 bug fix: relaxed the stream detection criteria to only require the major version to be 4 and not to check the minor version. Fixes #1720.
• configure: fixed the Qt detection with Qt 5.7.0 which now requires the compiler to be in C++11 mode.
• mkvmerge: MP4 bug fix wrt. DTS handling: mkvmerge will re-derive parameters such as number of channels and sampling frequency from the DTS bitstream circumventing invalid values in the track headers (e.g. a channel count of 0). Fixes #1727/1728.
• mkvmerge: TrueHD bug fix: fixed detection of 96 kHz sampling frequency.
• mkvinfo's GUI: fix a crash due to wrong usage of referenced temporary objects. Fixes #1725.
• MKVToolNix GUI: merge tool bug fix: the GUI now takes into account whether splitting is activated when looking for and warning due to existing destination files. Fixes #1694.
• mkvmerge: bug fix: the parser for the --default-duration argument was wrongfully handling arguments of the form "123/456i" (only this specific syntax and only with "i" as the unit; other formats and units were fine). This is part of #1673. Additionally the parser doesn't use the "double" data type internally anymore fixing loss of precision and failing test cases on certain 32bit platforms. This fixes #1705.

Build system changes

• build system: libEBML v1.3.4 and libMatroska v1.4.5 are now required due to several new elements having been specified for Matroska, and mkvmerge uses those elements.
• build system: libEBML v1.3.4 and libMatroska v1.4.5 are now required due to the usage of new elements introduced in libMatroska v1.4.5. The copies included in the MKVToolNix source code have been updated to those releases as well.

Other changes

• mkvmerge: MPEG TS: considerable parts of the module have been rewritten. Due to its convoluted structure didn't buffer PES packets properly before trying to parse the PES header leading to invalid memory accesses in certain cases.

Version 9.2.0 "Photograph" 2016-05-28

New features and enhancements

• MKVToolNix GUI: merge tool enhancement: the action "select all attached files" in the popup menu actions for the attached files view has been split up into "enable all attached files" and "disable all attached files". Implements #1698.
• mkvinfo GUI: enhancement: the window title now includes the file name. Implements #1679.
• mkvmerge: enhancement: the "bit depth" track header field will be set for DTS tracks from the first DTS core header. Implements #1680.

Bug fixes

• MKVToolNix GUI: bug fix on Windows: removing the drive letter does not cause the colon to be removed automatically anymore. Fixes #1692.
• MKVToolNix GUI: merge tool bug fix: it's no longer possible to select "1" as the maximum number of files to split into as mkvmerge doesn't accept that value. Fixes #1695.
• mkvmerge: bug fix: the "interval" chapter generation mode was always creating one chapter too many.
• mkvmerge: bug fix: if a certain number of chapters had been generated with --generate-chapters then mkvmerge wasn't replacing the void placerholder with the actual chapters. Fixes #1693.
• MKVToolNix GUI: merge tool bug fix: the track column "default track in output" wasn't taking into account if the track had its "default track" flag set to "no" in the source file. This would result in the column showing "yes" in certain situations even though mkvmerge would assign "no".
• mkvmerge: bug fix: fixed detection of (E-)AC-3 in MPEG TS files with unusual stream types (e.g. 0x87) but with (E-)AC-3 PMT descriptors. Fixes #1684.
• mkvmerge, mkvextract: bug fix: fixed handling of Big Endian PCM with a bit depth other than 16, 32 or 64 bits/sample. Other formats were using the Little Endian codec ID, but their content was actually not byte-swapped to match it. Now those other bit depths are byte-swapped to Little Endian, too. Fixes #1683.
• mkvmerge: bug fix: the time zone portion of the "date_local" member of the JSON and verbose identification formats contained the time zone's name instead of its offset on Windows due to the Visual C++ runtime's std::strftime not being C++11 compliant. Additionally this resulted in errors about invalid UTF-8 strings for locales where the time zone's name contained non-ASCII characters.

Other changes

• mkvinfo: the change to start the GUI by default on Windows and macOS has been reverted. Instead a separate executable (mkvinfo-gui) will be included for those platforms which starts the GUI by default. The newly introduced option "--no-gui" will remain valid but won't have any effect when used with mkvinfo.

Version 9.1.0 "Little Earthquakes" 2016-04-23

New features and enhancements

• mkvmerge: MPEG TS/teletext enhancement: included the teletext page number in the JSON/verbose identification output as track property "teletext_page".
• mkvmerge: MPEG TS/teletext enhancement: if a teletext track contains multiple teletext pages then mkvmerge will now recognize all of those pages as separate tracks to merge instead of only merging the first page. See #1662.
• mkvmerge: MPEG TS/teletext enhancement: mkvmerge will now ignore obviously bogus PTS values for teletext tracks and use PTS from earlier audio or video packets instead. See #1662.
• mkvmerge: MPEG TS reader enhancement: teletext tracks of type 5 (hearing impaired) are recognized as subtitles, too. Implements #1662.
• MKVToolNix GUI: merge tool enhancement: characters that aren't valid in path names are automatically removed from the output file name. Implements #1647.
• mkvextract: new feature: added support for extracting WebVTT subtitles. Implements the extraction part of #1592.
• mkvmerge: new feature: added support for reading WebVTT subtitles from WebVTT and Matroska files. Implements the merge part of #1592.
• mkvmerge: enhancement: when reading Matroska files not created by mkvmerge that contain chapters the existing edition UIDs and chapter UIDs are removed and random ones created. This is necessary as not only HandBrake but other tools assign sequential numbers starting at 1 for each file. Therefore there are two chapter entries with the UID 1, two with the UID 2 etc. and those should, strictly speaking, be treated as if they were a single chapter whereas the user expects those entries to stay separate entries.
• MKVToolNix GUI: new feature: added an option in the preferences ("Merge" → "Output") for controlling whether or not the GUI clears the "output file name" input upon removal of the last file.
• MKVToolNix GUI: new feature: added an option in the preferences ("Merge" → "Default values") for controlling whether or not the GUI clears the "file title" input upon removal of the last file.
• mkvmerge: enhancement: added the muxing date in both local time zone and UTC to verbose/JSON identification outputs (keys "date_local" and "date_utc", formatted after ISO 8601) when identifying Matroska files.
• mkvmerge: enhancement: added the minimum timestamp for each track in verbose/JSON identification outputs (key "minimum_timestamp") when identifying Matroska files. At most the first ten seconds are probed; if no block is found for a track within that range then the key is not output for the track. Also added "muxing_application" and "writing_application" to the "container" section of the output. Currently those are only set for Matroska files.

Bug fixes

• mkvmerge: MPEG TS bug fix: the "text_subtitles" property of the JSON/verbose identification modes was always set to true for all subtitle tracks, even for those that aren't text subtitles (VobSub, PG).
• mkvmerge: MPEG TS/teletext bug fix: the language code signaled in the MPEG TS PMT is taken into account when selecting the character encoding to use during decoding of the teletext subtitles, not just the "national character set" stored in the teletext page headers. For example, a German teletext page may signal "national character set" 0 (English) whereas it's actually 4 (German). See #1662.
• mkvmerge: teletext decoding bug fix: fixed dropping of certain non-ASCII characters in rare circumstances due to wrong filtering of already UTF-8 encoded strings.

• MKVToolNix GUI: bug fix (Windows only): the GUI didn't start if the USERNAME

  environment variable contained characters that aren't allowed in file names (e.g.

  or ?).

• mkvmerge: AVI reader bug fix: fixed reading files where the file ends in the middle of an audio chunk. Fixes #1657.
• mkvmerge: bug fix: mkvmerge will no longer abort reading a Matroska file with a structural error right before the first cluster. Fixes #1654.
• MKVToolNix: merge tool bug fix: when adding playlists the GUI won't ask the user whether or not to scan if there's only a single playlist in that directory.
• mkvmerge: bug fix: AVC/H.264: fixed handling of interlaced frames with bottom field first.
• MKVToolNix GUI: bug fix: fixed huge memory consumption (e.g. allocation of 2 GB for a JSON file of 650 KB) in the JSON library by updating said JSON library. Fixes #1631.

Other changes

• MKVToolNix GUI: merge tool change: attachments from source files have been moved from the "Tracks, chapters, tags and attachments" list on the "sources" tab to a new list on the "attachments" tab. That way all existing attachments and all the ones to newly add will be shown in a single tab. This makes it easier to decide which attachments will have to be added and which can be removed.

Version 9.0.1 "Obstacles" 2016-03-28

Bug fixes

• mkvmerge: bug fix: regression in v9.0.0: the text subtitle packetizer was wrongfully assuming an encoding of UTF-8 if none was given instead of assuming the system's encoding. Fixes #1639.
• mkvmerge: bug fix: if too many chapters had been generated with --generate-chapters then mkvmerge created a bogus entry in the meta seek element and did not actually write the chapters to the file.
• mkvmerge: bug fix: the DTS packetizer was setting the number of channels wrong sometimes when reducing to the DTS core. It was using the number of channels including the extensions instead of the channels of the core only.

Version 9.0.0 "Power to progress" 2016-03-26

New features and enhancements

• all: new feature: added a new translation of both the programs and the man pages to Korean by Potato (see AUTHORS).
• MKVToolNix GUI: chapter editor enhancement: added a button next to the 'segment UID' controls that enable the user to select a Matroska file. The GUI reads that file's segment UID and enters its value into the input field.
• mkvinfo: change: on Windows and macOS mkvinfo will now launch the GUI by default unless the option »--no-gui« (or »-G«) has been given. This is due to the fact that on both OS users often use portable versions respectively disk images and launch the executable directly and not via start menu entries. In those situations adding command line options for launching the GUI is unnecessarily difficult.
• MKVToolNix GUI: merge tool (playlist selection dialog) enhancement: the playlist items are sorted by their position within the playlist by default.
• MKVToolNix GUI: merge tool (playlist selection dialog) enhancement: double-clicking on a playlist will select and add that playlist.
• mkvmerge: enhancement: added the number of bits per sample to the verbose/JSON identification output for FLAC files.
• mkvextract: new feature: implemented the extraction of Big Endian PCM (codec ID A_PCM/INT/BIG) to WAV files. The content will be byte-swapped into Little Endian PCM in the process.
• mkvmerge: enhancement: Big Endian PCM tracks will now be byte-swapped into Little Endian PCM, and the codec ID A_PCM/INT/LIT will be used. This was done due to a lot of players not supporting Big Endian PCM inside Matroska.
• MKVToolNix GUI: job queue enhancement: completed jobs will now be removed from the queue automatically on exit if the job has been added more than 14 days ago in order not to let the queue grow arbitrarily large. This feature can be turned off and the number of days can be adjusted in the preferences.
• mkvextract: enhancement: when extracting chapters in the simple format the user can use the new option »--simple-language …« for selecting the chapter names that are output. Normally the first chapter name found in each atom is used. With this option mkvextract looks for a chapter name whose language matches the specified one. Implements the feature enhancement part of #1610.
• MKVToolNix GUI: new chapter editor feature: added an option to multiply all chapter timecodes by a factor to the "additional modifications" dialog. Implements #1609.

Bug fixes

• Installer: fixed support for silent installation and uninstallation.
• mkvmerge: bug fix: fixed two more issues in the conversion of teletext subtitles to SRT subtitles: 1. Packets belonging to pages that don't contain subtitles were used as valid end points for subtitles causing entries to become very short (e.g. 40ms). 2. Sometimes the timestamps of wrong packets were used as entry's start and end points causing start timestamps and durations that were slightly off. Second part of the fix for #1623.
• mkvmerge: bug fix: MP4/QuickTime reader: audio tracks can contain two instances of certain header fields (channel count, bits/sample & channel, sample rate) in the STSD atom: one instance in the version 0 header and one in the version 2 header parts. So far mkvmerge has used those from the version 0 header only and ignored the ones from the version 2 header. This has been changed to match the behavior of other players and MP4 readers like ffmpeg. If the STSD atom contains a version 2 structure then the fields from it will be used. Otherwise the fields from the version 0 part will be used. Fixes #1633.
• mkvmerge: bug fix: fixed two issues in the conversion of teletext subtitles to SRT subtitles: 1. Consecutive teletext packets with the same content are now merged into a single entry instead of resulting in multiple entries. 2. The calculation of a packet's duration was wrong in certain situations. Part of the fix for #1623.
• mkvextract: bug fix: fixed the duplication of VPS, SPS, PPS and SEI NALUs when extracting H.265/HEVC tracks. See #1076 and #1621.
• mkvmerge: bug fix: reverted the patch by Vladimír Pilný that made the H.265/HEVC not store SEI NALUs with the frames during muxing. It was supposed to prevent having the SEI NALUs present twice when extracting HEVC due to some SEI information also being stored in the codec private data, but it dropped a lot of other SEI NALUs irrevocably. Fixes #1621.
• mkvmerge: bug fix: the --sub-charset option is now ignored for text subtitle files that start with a byte-order mark (BOM) bringing the behavior in line with the documentation. Fixes #1620.
• mkvmerge, MKVToolNix GUI: new feature: added switches (»--generate-chapters« and »--generate-chapter-name-template«) and their corresponding UI items for generating chapters while muxing. Two modes are currently supported: »when-appending« which creates one chapter at the beginning and an additional one each time a file is appended and »interval:…« which generates chapters in fixed intervals. Implements mkvmerge's and the GUI's part of #1586.
• mkvpropedit, MKVToolNix GUI's header editor: bug fix: fixed the handling of files where the last level 1 element has an unknown size. The programs will now either fix this element to have a known size or abort the process with an appropriate error message but without modifying the file. Fixes #1601.
• mkvextract: several issues regarding the extraction of chapters in the simple format have been fixed: if multiple names with different languages were present then an entry had been written for each name; the total number of entries written was wrong; the wrong entries were written. The new code only writes the first name found from the top-most chapter atoms of all editions. Chapters flagged as hidden or as not enabled are not extracted at all. Fixes the bug part of #1610.

Build system changes

• build system: implemented support for explicit pre-compiled headers for Linux and macOS.
• build system: added an option to configure »--without-qt-pkg-config«. Normally configure uses pkg-config for detecting Qt and setting QT_CFLAGS and QT_LIBS. With this option configure won't use pkg-config and rely on the user having set both variables before running configure. This enables using Qt on systems where no pkg-config files are generated (e.g. Qt 5.6.0 on MacOS with frameworks enabled).

Other changes

• mkvmerge: MP4/QuickTime reader: audio tracks with the FourCC 'lpcm' are muxed as A_PCM/INT/LIT instead of A_QUICKTIME.

Version 8.9.0 "Father Daughter" 2016-02-21

New features and enhancements

• MKVToolNix GUI: header editor enhancement: when the user drags & drops files on an open header editor tab the GUI will ask the user what to do with them: either open the files as new header editor tabs or add the files as new attachments to the current tab. The action can also be set as the default. Implements #1585.
• MKVToolNix GUI: chapter & header editor enhancement: Matroska files are initially opened in read-only mode and only later re-opened in read/write mode in order to enable reading from write-protected files. Part of the implementation of #1594.
• MKVToolNix GUI: chapter & header enhancement: the error messages shown when a Matroska file could not be parsed have been improved to include the most likely reasons. Part of the implementation of #1594.
• MKVToolNix GUI: chapter editor enhancement: added a menu entry for removing chapters from an existing Matroska file. Inspired by #1593.
• MKVToolNix GUI: chapter editor enhancement: it is now possible to save chapters to Matroska files after having removed all entries (editions and chapter atoms). This effectively removes the chapters from the file. Implements #1593.
• MKVToolNix GUI: job queue enhancement: added keyboard shortcuts for removing all completed jobs and for removing successfully completed jobs. Implements #1599.
• MKVToolNix GUI: merge tool enhancement: added icons to the context menu actions in the "attachments" sub-tab. Implements #1596.
• MKVToolNix GUI: merge tool enhancement: made the context menu entries in the "attachments" sub-tab clearer. Implements #1597.
• docs: added a Polish translation of the man pages by Daniel Kluz (see AUTHORS).
• MKVToolNix GUI: "run program after XYZ" enhancement: configurations can now be deactivated without having to change them. Implements #1581.
• mkvmerge: enhancement: when reading Matroska files created by HandBrake that contain chapters the existing edition UIDs and chapter UIDs are removed and random ones created. This is necessary as HandBrake assigns sequential numbers starting at 1 for each file. Therefore there are two chapter entries with the UID 1, two with the UID 2 etc. and those should, strictly speaking, be treated as if they were a single chapter whereas the user expects those entries to stay separate entries. Implements an improvement for issues such as #1561.
• MKVToolNix GUI: enhancement: the "escape for Windows' cmd.exe" mechanism will only escape arguments that actually need escaping in order to produce easier to read command lines.

Bug fixes

• MKVToolNix GUI: bug fix: ampersands (&) in file names were shown as keyboard shortcuts in tab titles in various tools (merge tool, chapter and header editors, job output tool). Fixes #1603.
• mkvmerge: bug fix: fixed the handling of AVIs with a negative video height (which signals that the rows are arranged top-to-bottom).
• MKVToolNix GUI: job queue bug fix: fixed an invalid memory access in the "edit in corresponding tool and remove from queue" functionality.
• MKVToolNix GUI: re-write, merge tool bug fix: the file identification is now based on mkvmerge's JSON output instead of its verbose output. This also fixes the merge tool not showing names of attachments inside Matroska files properly if those names contain spaces (#1583).
• MKVToolNix GUI: merge tool bug fix: the "mux this" combo box was disabled if a single attachment was selected.
• mkvmerge: bug fix: removed spurious output generated during file identification in the HEVC detection code (e.g. "Error No Error").
• mkvmerge: bug fix: fixed the output of the "playlist_file" and "other_file" properties of the "container" entity in the JSON identification format from a single string to an array of strings. The format version has been bumped to 3 due to this change.
• mkvmerge: bug fix: fixed parsing of AAC in MP4 with a program config element with an empty comment field at the end of the GA specific config. Fixes #1578.
• MKVToolNix GUI: merge tool bug fix: the GUI no longer requires at least one source file to be present before muxing can start in order to allow creation of track-less files. Fixes #1576.
• mkvmerge: QuickTime/MP4 reader: fix a division by zero in the index generation for certain old audio codecs that have certain header fields (bytes_per_frame, samples_per_packet) set to 0.
• mkvinfo: bug fix: global elements (EBML void and CRC-32 elements) are now handled correctly if they're located inside the segment info or the chapter translate parents.

Other changes

• MKVToolNix GUI: the default font size adjustment has been deactivated for the time being as it causes problems on high DPI displays. See #1602.

Version 8.8.0 "Wind at my back" 2016-01-10

New features and enhancements

• MKVToolNix GUI: "run program after XYZ" enhancement: added a button for executing the program right now as a test run. See #1570.
• MKVToolNix GUI: "run program after XYZ" enhancement: an error message is shown if the program couldn't be executed. See #1570.
• MKVToolNix GUI: "run program after XYZ" enhancement: any leading spaces in the executable path are removed in order to make copying & pasting less error-prone.
• mkvpropedit: enhancement: mkvpropedit will accept terminology variants of ISO 639-2 language codes and convert them to the bibliographic variants automatically. Implements #1565.
• MKVToolNix GUI: enhancement: the GUI's default font's size is now scaled with the screen's DPI and is at least 9 points high (up from 8). Additionally on Windows "Segoe UI", which is Windows' default user interface font, is used instead of the default provided by Qt, "MS Shell Dlg 2".
• MKVToolNix GUI: enhancement: the user can select the font family and size for the GUI in the preferences.
• MKVToolNix GUI: merge tool enhancement: added a column to the "attachments" tab containing the file size.
• MKVToolNix GUI: enhancement: pressing the insert key when the focus is on the merge tool's source files or attachments list, on the chapter editor's chapter list or on the header editor's list will invoke the corresponding action for adding elements to that list.
• MKVToolNix GUI: new feature: implemented adding, changing and removing attachments in existing Matroska files as part of the header editor. Implements #1533.

Bug fixes

• MKVToolNix GUI: "run program after XYZ" bug fix: the paths used in the variables and the executable are converted to the platforms native path separators. This fixes compatibility with Windows applications that don't support the use of forward slashes in path names like e.g. VLC. See #1570.
• mkvmerge: bug fix: fixed TrueHD detection both as raw streams as well as inside other contains if the stream does not start with a TrueHD sync frame.
• MKVToolNix GUI: new merge tool feature: added a layout for the track properties where they're on the right of the files/tracks lists in two fixed columns. Implements #1526.
• mkvmerge: bug fix: fixed a mis-detection of an MPEG-2 video elementary stream as a TrueHD file which then caused a segmentation fault. Fixes #1559.
• mkvmerge: bug fix: Matroska attachments with the same name, size and MIME type were not output during file identification.
• MKVToolNix GUI: merge tool bug fix: when using one of the "select all tracks (of type…)" actions the "properties" column didn't show the selection.

Version 8.7.0 "All of the above" 2015-12-31

New features and enhancements

• mkvmerge: enhancement: the MP4 reader will keep the display dimensions from the track header atom ("tkhd") and use them as the display width & height. See also #1547.
• MKVToolNix GUI: merge tool enhancement: the "add source files" button now has optional popup menu containing actions for adding/appending files and adding files as additional parts for easier discovery of those actions. This popup is only shown if the user clicks on the arrow shown on the right of the button.
• mkvmerge: new feature: TrueHD tracks that contain Dolby Atmos will be identified as "TrueHD Atmos". Implements #1519.
• MKVToolNix GUI: new merge tool feature: added menu options in the "Merge" menu for copying either the first source file's name or the current output file's name into the "file title" control.
• mkvpropedit: new feature: added an option for calculating statistics for all tracks and adding new/updating existing statistics tags in a file. Second half of the implementation of #1507.
• mkvpropedit: new feature: added an option for removing all existing track statistics tags from a file. Part of the implementation of #1507.
• mkvmerge: enhancement: added the container's internal track ID as the "number" attribute in verbose & JSON identification modes for several container types (QuickTime/MP4: the track ID from the 'tkhd' atom; MPEG program stream: the sub-stream ID in the upper 32 bits and the stream ID in the lower 32 bits; MPEG transport stream: the program ID; Ogg/OGM: the stream's serial number field; RealMedia: the track ID). Implements #1541.
• mkvmerge: enhancement: if JSON identification mode is active then warnings and errors will be output as JSON as well. They're output as arrays of strings as the keys "warnings" and "errors" of the main JSON object. Implements #1537.
• mkvpropedit: enhancement: when using --add-attachment, --replace-attachment or --update-attachment the UID can be changed with --attachment-uid. See #1532.
• mkvpropedit: new feature: added an option "--update-attachment" for updating the properties of existing attachments without replacing their content. Implements #1532.
• MKVToolNix GUI: new feature: added options for running arbitrary programs after a job has finished or after the queue has finished. Implements #1406.
• MKVToolNix GUI: merge tool enhancement: if files are dragged & dropped from an external application with the right mouse button being pressed then the GUI will always ask the user what to do with the files even if the user has configured the GUI not to ask. Implements #1508.

Bug fixes

• mkvmerge: bug fix: fixed the handling of a PES size of 0 ( = unknown). Tracks whose PES packets had such a size were sometimes not detected at all, and even if they were their content was incomplete. Fixes #1553.
• mkvmerge: bug fix: made the MPEG 1/2 video elementary stream file type recognition more resilient and more flexible dropping the requirement for a file to start with an MPEG start code (0x00 00 01). Fixes #1462.
• mkvpropedit: bug fix: when changing the track language it is now verified to be a valid ISO 639-2 language code before writing it to the file. Fixes #1550.
• mkvmerge: bug fix: the Matroska reader now uses TrueHD-specific code when reading Matroska files. This can fix things like wrong frame type flags.
• mkvmerge: bug fix: MP4 edit lists of certain types (two entries, first entry's media_time is -1, second entry's segment_duration is != 0) weren't handled properly resulting in key frame flags being assigned to the wrong frames. Fixes #1547.
• mkvmerge: bug fix: the H.265/HEVC code was writing SEI NALUs twice. This had already been mentioned in #1076 but never fixed. Patch by Vladimír Pilný.
• mkvmerge: bug fix: the H.265/HEVC code wasn't converting slice NALUs to RBSP form before parsing it resulting in wrongly timestamped frames under certain conditions. This is a similar fix to the issues reported in #918 and #1548.
• mkvmerge: bug fix: the H.264/AVC code wasn't converting slice NALUs to RBSP form before parsing it resulting in wrongly timestamped frames under certain conditions. Fixes #918 and #1548.
• mkvmerge: bug fix: the MP4 reader can now understand the 'random access point' sample grouping information for marking open GOP random access points as key frames. Fixes #1543.
• mkvmerge: bug fix: fixed the decisions whether or not to write the last frame of a track as a BlockGroup or a SimpleBlock and whether or not to write a block duration for that frame. Fixes #1545.
• mkvmerge: bug fix: the progress calculation was sometimes outputting negative numbers when appending Matroska files whose timestamps don't start at 0 (e.g. if they were created by splitting with linking enabled). In the the GUI this resulted in lines like "#GUI#progress -2%" in the job's output.
• mkvmerge: bug fix: AAC with low sampling frequencies was sometimes mis-detected with the wrong profile preventing appending it to other AAC tracks. Fixes #1540.
• mkvmerge: bug fix: chapters were output as both "chapters" and "track_tags" in JSON identification mode. Fixes #1538.
• MKVToolNix GUI: bug fix: the "split mode" drop-down box got reset to "do not split" each time the preferences dialog was closed with the "OK" button. Fixes #1539.
• MKVToolNix GUI: enhancement: when starting the GUI with a saved settings file then the GUI won't contain an empty tab in the merge tool anymore. Fixes #1504.
• mkvmerge: bug fix: fixed the key frame detection for VP9 video tracks.
• MKVToolNix GUI: bug fix: relative file names given on the command line were interpreted as being relative to the user's home directory. Fixes #1534.

Other changes

• all: reversion of a change: several ISO 639-2 codes of languages that are very old and not spoken anymore have been re-added (e.g. "English, Middle (1100-1500)") due to feedback from users who did have a use for such codes.
• all: reversion of a change: all of the tools will write a byte-order mark (BOM) to text files encoded any of the UTF-* schemes again. This reverts the change in release 8.6.0 due to user feedback preferring the old way.
• MKVToolNix GUI: the preferences dialog has been reworked heavily in order to provide a better overview and to be less overwhelming.

Version 8.6.1 "Flying" 2015-11-29

Bug fixes

• mkvpropedit, GUI's chapter & header editors bug fix: in certain situations the modified file would not contain a seek head before the first cluster anymore resulting in most players not finding elements such as attachments or the index located at the end of the file anymore. Fixes #1513.
• mkvmerge: bug fix: the change to do a deeper file analysis if no seek head was found was causing huge increases in file type detection time as popular tools like x264 don't write seek heads. The way elements at the end are searched has been changed to only scan the last 5 MB of the file instead of iterating over every level 1 element from the beginning of the file.

Version 8.6.0 "A Place In Your World" 2015-11-28

New features and enhancements

• mkvmerge: enhancement: if no seek head is found before the first cluster when reading Matroska files then mkvmerge will attempt a deeper scan of all elements in the file in order to find track headers, attachments, chapters and tags located at the end of the file. See #1513 for the rationale.
• mkvmerge: enhancement: added JSON as an output format for file type identification. It can be activated with "--identification-format json --identify yourfile.ext" (or their short counterparts "-F json -i yourfile.ext").

Bug fixes

• mkvmerge: Matroska reader bug fix: the info about which packetizer is used was output twice for each HEVC track. Fixes #1522.
• MKVToolNix GUI: bug fix: implemented a workaround for a bug in Qt which caused the GUI not to start anymore due to failing to detect a stale lock file if the GUI had crashed before on a computer with a host name that included non-ASCII characters. See https://bugreports.qt.io/browse/QTBUG-49640
• mkvmerge: bug fix: a track's number of bits per audio sample wasn't output in verbose identification mode even if it was present in the file.
• MKVToolNix GUI: header editor bug fix: the "status" description wasn't adjusting its height properly resulting in its text being cut off. Fixes #1517.
• MKVToolNix GUI: bug fix: the program changes its working directory to the user's profile/home directory on startup allowing the removal of its installation folder even if a program started by the GUI (e.g. a web browser) is still running. Fixes #1518.
• ebml_validator: bug fix: elements with an unknown size weren't handled correctly.
• build system: fixed building and linking against libEBML and libMatroska if they're installed in a non-standard location.
• mkvpropedit, MKVToolNix GUI's chapter and header editors: the tools were unable to update elements in files without a seek head present. Fixes #1516.
• mkvmerge: bug fix: fixed two issues causing mkvmerge to write invalid data when updating track headers caused by the fix for "Re-rendering track headers: data_size != 0 not implemented yet". Fixes #1498.
• MKVToolNix GUI: bug fix: the options for linking to the next/previous segment UID were wrong. Fixes #1511.
• mkvmerge: bug fix: the VC-1 handlig code was duplicating the first sequence headers with each mux. Fixes #1503.
• build system: bug fix: configure was checking for and using libintl if --without-gettext was used. Fixes #1501.

Other changes

• all: change: none of the tools will write a byte-order mark (BOM) to text files encoded any of the UTF-* schemes anymore.
• all: MKVToolNix now requires gcc 4.8.0 or later or clang 3.4 or later for compilation.

Version 8.5.2 "Crosses" 2015-11-04

New features and enhancements

• mkvpropedit, MKVToolNix GUI header editor: enhancement: added the "codec delay" track header field as an editable property.

Bug fixes

• MKVToolNix GUI: bug fix: the file/track columns aren't resized to fit their content when expanding/collapsing tree nodes anymore. Such expansion also happened when moving entries with the "move up/down" buttons. Fixes #1492.
• mkvmerge: bug fix: fixed the values of the "previous/next segment UID" elements when splitting by parts with segment linking enabled. Fixes #1497.
• mkvmerge: bug fix: mkvmerge no longer creates a "next segment UID" field in the last file when splitting and segment linking is active.
• mkvmerge: bug fix: fixed an endless loop when updating track headers caused by the fix for "Re-rendering track headers: data_size != 0 not implemented yet". Fixes #1485.

Version 8.5.1 "Where you lead I will follow" 2015-10-21

New features and enhancements

• MKVToolNix GUI: header editor enhancement: several track properties like name or language are shown as columns in the tree for easier distinction between tracks. They're also shown on the overview page on the right when that track's entry is selected in the tree. The text in the labels on this overview page can be selected with the mouse for copying & pasting elsewhere.

Bug fixes

• build system: libEBML v1.3.3 and libMatroska v1.4.4 are now required due to important fixes for invalid memory accesses in those two releases. The copies included in the MKVToolNix source code have been updated to those releases as well.
• MKVToolNix GUI: bug fix: the "save file" dialogs did not have the currently entered file name pre-selected anymore. Fixes #1480.
• MKVToolNix GUI: bug fix: fixed a crash when loading corrupted job settings.
• MKVToolNix GUI: header editor bug fix: the tree items weren't re-translated when the GUI language was changed.
• mkvmerge: bug fix: updating the track headers wasn't working in some rare cases (corresponding error message "Re-rendering track headers: data_size != 0 not implemented yet").
• MKVToolNix GUI: bug fix (Linux): the function "open folder" was inserting a superfluous leading slash in the directory name. This causes some file managers (in this particular case Dolphin on Linux) to interpret a directory name like "//home/mosu/…" as a share called "mosu" on a Samba/Windows server called "home" and to prepend the whole name with the "smb://" protocol. Fixes #1479.

Version 8.5.0 "Vanishing Act" 2015-10-17

New features and enhancements

• MKVToolNix GUI: merge tool enhancement: when dropping files onto the GUI the last file's directory is remembered as the last directory a file was opened from causing the next open file dialog to start in that directory. Implements #1477.
• all: new feature: added a Catalan translation of the man pages by Antoni Bella Pérez (see AUTHORS).
• MKVToolNix GUI: chapter editor enhancement: the start and end timestamps in the tree are displayed with nanosecond precision. Implements #1474.
• MKVToolNix GUI: merge tool enhancement: added a column to the track list containing the state of the "forced track" flag. Implements #1472.
• MKVToolNix GUI: merge tool enhancement: pressing the delete key in the attachments list removes the selected entries. Implements #1473.
• MKVToolNix GUI: enhancement: the context menu for the status bar job status counters is now shown when the user clicks with any mouse button, not just the right one. This should make the feature easier to discover. Implements #1396.
• MKVToolNix GUI: new job queue feature: added an option in the preferences for resetting the warning and error counters of all jobs and the global counters in the status bar to 0 when exiting the program. Implements #1437.
• MKVToolNix GUI: current job output enhancement: the separator lines for warnings and errors ("--- Warnings emitted by Job … started on … ---") are only shown when warnings/errors actually occur and not for each job that's run.
• mkvmerge: enhancement: improved identification output for DTS 96/24. Implements #1431.
• MKVToolNix GUI: merge tool enhancement: added buttons for previewing the character sets for text subtitles read from SRT and SSA/ASS files as well as for chapter files. They're located next to the drop down boxes for the character sets on the input and output tabs.
• MKVToolNix GUI: merge tool enhancement: added buttons next to the 'segment UID', 'previous segment UID' and 'next segment UID' controls that enable the user to select a Matroska file. The GUI reads that file's segment UID and enters its value into the corresponding control. Part of the implementation of #1363.
• MKVToolNix GUI: chapter editor enhancement: Added another variable to the chapter name templates called <START> which is replaced by the chapter's start timestamp. An optional format can be specified, e.g. <START:%H:%M:%S.%3n> resulting in something like 01:35:27.734. This can be used in the 'generate sub-chapters' or the 'renumber sub-chapters' functionality. Implements #1445.
• MKVToolNix GUI: merge tool enhancement: implemented the optional warning before overwriting existing files when starting to mux or adding a job to the queue. The pending jobs in the queue are checked for the same destination file name as well. Implements #1390.
• MKVToolNix GUI: enhancement: pressing the delete key in the chapter editor and the job queue removes the selected entries. Implements #1454.
• MKVToolNix GUI: merge tool enhancement: dropping chapter, tag and segment info files from external applications will cause those file names to be added to the appropriate controls on the 'output' tab. Implements #1332 and 1345.
• MKVToolNix GUI: merge tool enhancement: the feature "default track language" has been split into track languages by type. There are now three separate settings for audio, video and subtitle tracks. Implements #1338.
• mkvmerge: enhancement: the verbose identification for MP4 files will now derive basic audio parameters of MP3 and AC3 tracks from the bitstream instead of relying on the values in the track headers.
• MKVToolNix GUI: new merge tool feature: implemented an optional vertical layout mode for the "input" tab in which the track properties are shown below the track list. Implements #1304.
• MKVToolNix GUI: merge tool enhancement: when browsing for chapter files on the "output" tab the initial directory is the first input file's directory instead of the directory accessed last.
• MKVToolNix GUI: enhancement: on Windows the drop down boxes were elliding overlong text. This has been changed to making the open combo boxes' scroll areas wide enough to contain the whole entries. This matches the behavior of Qt on other operating systems.
• MKVToolNix GUI: new merge tool feature: added context menu entries for opening the selected files/the source files of selected tracks in MediaInfo. Implements #1423.

Bug fixes

• mkvmerge: bug fix: the cropping parameters contained the "cropping:" prefix twice in the verbose identification output.
• MKVToolNix GUI: enhancement: if the last directory opened doesn't exist anymore then default to one that does in order to prevent an error message from older Windows versions about a location not being available. Fixes #1438.
• MKVToolNix GUI: bug fix: the menus that are currently not shown are disabled properly so that they don't react to keyboard shortcuts anymore. This affected e.g. Alt+J with the English localization as there were three shortcuts active: the "add to job queue" button (if the merge tool is active), the "job queue" menu and the "job output" menu.
• MKVToolNix GUI: bug fix (Windows): changed some options for Qt's file dialogs in order to speed up access to network shares in certain situations. Fixes #1459.
• mkvmerge: bug fix: PCM tracks: if the number of samples per packet varies then no default duration will be written. Fixes #1426.
• mkvmerge: new feature: The three options that use segment UIDs (--segment-uid, --link-to-previous and --link-to-next) can now read the segment UID of an existing Matroska file. For this the file's name must be given as an argument prefixed with = (e.g. '--segment-uid =some_file.mkv'). Implements #1363.
• MKVToolNix GUI: merge tool bug fix: If there's currently no source file present when the user drags & drops files onto the merge tool then the GUI will no longer leave an empty, superfluous tab for certain drop modes. Fixes #1446.
• MKVToolNix GUI: merge tool bug fix: the "default track flag in output" column wasn't updated properly directly after loading settings.
• MKVToolNix GUI: merge tool bug fix: the cropping parameters were not converted into parameters for mkvmerge at all.
• all: fixed the spelling of the AC-3, E-AC-3 and VC-1 codec names.
• MKVToolNix GUI: bug fix: the interface language selection has been improved not to select wrong entries resulting in error messages from mkvmerge about unknown translations. Fixes #1434.
• MKVToolNix GUI: bug fix: if the Windows version of the GUI was started from a symbolically linked folder then it would crash when the user added a file. Fixes #1315.

Other changes

• all: several ISO 639-2 codes of languages that are very old and not spoken anymore have been removed (e.g. "English, Middle (1100-1500)").

Version 8.4.0 "A better way to fly" 2015-09-19

New features and enhancements

• MKVToolNix GUI: new merge tool feature: when dragging & dropping files onto merge settings already containing a file the user can set more options to be always done instead of asking (before: only adding files to the current merge settings could be thus marked; now: adding to current, adding to new settings and adding each file to new settings can be set to perform without asking). Implements #1388.
• MKVToolNix GUI: merge tool enhancement: when dragging & dropping files onto merge settings already containing a file the dialog asking the user what to do has received a new option for creating one new merge tab for each of the dropped files. Implements #1380.
• MKVToolNix GUI: new merge tool feature: the "tracks" tree view contains a new column titled "properties" which contains basic track properties: the pixel dimensions for a video track and sampling frequency, number of channels and bits per sample for an audio track. Implements #1295.
• mkvmerge: enhancement: the verbose identification result for all audio tracks has been extended to include the number of channels, the sample rate and the bits per sample where applicable. Part of the implementation of #1295.
• mkvmerge: enhancement: the pixel width/height will be reported in verbose identification mode for all video tracks.
• MKVToolNix GUI: new merge tool feature: added a column in the track list showing the effective state of the "default track" flag. It shows the state of the flag as it will be in the output file. Implements #1353.
• mkvmerge: enhancement: when mkvmerge encounters garbage data in the middle of AC-3 or MP3 tracks it will now output the timecode where the garbage occurred in order to make checking for audio/video sync issues easier. Implements #1420.
• MKVToolNix GUI: chapter editor enhancement: added a column in the tree with the edition's/chapter's flags.
• MKVToolNix GUI: new feature: the state of all columns in all list/tree views can be reset (both the shown/hidden state as well as their order) from the column's context menu. See #1268.
• MKVToolNix GUI: new feature: the column headers of all list/tree views can be re-ordered via drag & drop and the GUI will remember their position upon restart. Additionally the columns can be hidden/shown via a context menu by right-clicking on the column headers. Implements #1268.
• MKVToolNix GUI: new chapter editor feature: added an option for skipping chapters marked as "hidden" in the re-numbering dialog. Implements #1414.
• all: new feature: added a new translation to Serbian (Cyrillic) by Jay Alexander Fleming (see AUTHORS).
• MKVToolNix GUI: enhancement: the header editor will convert ISO 639-2 terminology codes used in language elements to their corresponding bibliographic variants. Implements #1418.
• MKVToolNix GUI: enhancement: the titles and button texts of dialogs asking questions have been improved to be easier understandable. For example, instead of using "yes/no" as the answers to the question "Do you want to close the unmodified file?" the choices are now "Close file/Cancel". Implements #1417.
• MKVToolNix GUI: chapter editor enhancement: when loading simple/ OGM style chapter files that contain non-ASCII characters and which do not start with a byte order mark (BOM) the GUI will let the user chose the character set to use. A preview is shown for the selected character set and updated when the user changes the character set.
• MKVToolNix GUI: merge tool enhancement: added "remove all" and "select all" entries to the attachments context menu. Implements #1386.
• MKVToolNix GUI: job output enhancement: the output, warnings and error text views are now separated by two splitters enabling the user to change their respective sizes. These changes are remembered over restarts. Implements #1394.
• MKVToolNix GUI: chapter editor enhancement: pressing shift+return will cause the next appropriate chapter control to be selected depending on where the focus currently is: from a chapter input (start/end time, flags, UIDs) to the next chapter entry's start time, from a chapter name to the next chapter name and from the last chapter name to the next chapter entry's first chapter name. Implements #1398 and complements #1358.
• MKVToolNix GUI: chapter editor enhancement: pressing return on the very last chapter entry will wrap and focus the first one in the tree again. Enhances #1358.
• MKVToolNix GUI: enhancement: scrolling over input elements like combo boxes, check boxes and radio buttons located within a scroll area will now scroll the scroll area instead of the element the cursor is over (e.g. a combo box). Implements #1400.

Bug fixes

• MKVToolNix GUI: chapter editor bug fix: whenever the additional modification of "expanding start/end timecodes to include the minimum/maximum timecodes of their children" was run on an edition entry then ChapterTimeStart and sometimes ChapterTimeEnd nodes were inserted as direct children of the EditionEntry node when saving. This resulted in invalid chapters.
• mkvmerge: bug fix: the pixel dimensions reported for VC-1 in MPEG transport streams in verbose identification mode was 0x0.
• mkvmerge: bug fix: the number of channels and the sample rate reported for DTS in MPEG transport streams and MPEG program streams in verbose identification mode was 0.
• all: bug fix: parsing of strings containing negative values or timecodes was broken on 32bit architectures. Fixes #1425.
• MKVToolNix GUI: merge tool bug fix: if the output file name policy "last output directory" was used then manual changes to the output file name weren't recognized as changes to the last output directory. Fixes #1411.
• MKVToolNix GUI: merge tool bug fix: the "default subtitle charset" is not applied to text subtitles from Matroska files as those are always encoded in UTF-8. Fixes #1416.
• MKVToolNix GUI: chapter editor bug fix: the "shift timecodes" action in the mass modification dialog wasn't working at all, and selecting multiple actions in the dialog would result in wrong actions being executed.
• MKVToolNix GUI: bug fix: fixed the total job queue progress with respect to removing completed jobs (either automatically or manually). Fixes #1405.
• MKVToolNix GUI: bug fix: mkvmerge is now run in with the same interface language set for the GUI.
• mkvmerge: bug fix: The formula used for calculating the audio delay for garbage data at the start of tracks in AVI files has been fixed again. It now uses the values dwStart, dwScale and dwSampleSize from the AVI stream header structure instead of values derived from the audio packet headers. Fixes #1382 and still works correctly for #1137.
• all: the environment variable <TOOLNAME>_OPTIONS is now parsed for options for TOOL (e.g. MKVMERGE_OPTIONS for mkvmerge). MKVTOOLNIX_OPTIONS is still used for all programs. Fixes #1403.
• MKVToolNix GUI: bug fix: fixed the escaping of the command line for cmd.exe regarding the command name itself (the very first argument). Fixes #1401.
• build system: bug fix: fixed Qt platform plugin detection on MacOS.

Build system changes

• build system: removal: the switch "--without-mkvtoolnix-gui" has been removed. There are only two GUIs left in the package: the Qt-enabled mkvinfo and MKVToolNix GUI. Both are enabled by default and can be disabled with the option "--disable-qt". In that case only the text-mode version of mkvinfo is built, and the MKVToolNix GUI is not built at all.

Other changes

• mkvmerge: container and track properties in verbose identification mode are now output sorted.
• mkvmerge: the verbose identification result for the MPEG program stream, MPEG transport stream and WAV readers has been changed for audio tracks in order to match the Matroska reader's result. The old keys "channels", "sample_rate" and "bits_per_sample" have been replaced by "audio_channels", "audio_sampling_frequency" and "audio_bits_per_sample".
• Removal: all support for wxWidgets has been removed. This means that the mkvmerge GUI (mmg) has been removed and that mkvinfo now only supports a text-mode and a Qt-based interface.

Version 8.3.0 "Over the Horizon" 2015-08-15

New features and enhancements

• MKVToolNix GUI: chapter editor enhancement: pressing return will cause the next appropriate chapter control to be selected depending on where the focus currently is: from a chapter input to the first chapter name, from a chapter name to the next chapter name and from the last chapter name to the next chapter entry's start time. Implements #1358.
• MKVToolNix GUI: enhancement: the number of running jobs is shown in the status bar. Implements #1381.
• MKVToolNix GUI: new job queue feature: added a context menu for force-starting selected jobs. This allows for running more than one job at the same time. Implements #1395.
• MKVToolNix GUI: new merge tool feature: added an option for automatically setting the "default track" flag to "no" for all subtitle tracks when they're added. Implements #1339.
• MKVToolNix GUI: new merge tool feature: dragging & dropping files onto line edit controls that expect file names (e.g. the "chapter file" control) will set that line edit's text to the dropped file name. Implements #1344.
• MKVToolNix GUI: new feature: jobs in the queue can now be edited again. For that they're re-opened in the corresponding tool and removed from the queue. Implements #1296.
• MKVToolNix GUI: enhancement: the format of the setting and queue files has been changed from INI style to JSON documents. Reading older setting files in INI style remains supported, but saving will convert them to JSON. Together with the other three changes mentioned below this results in a noticeable reduction in the time needed for writing the queue files, e.g. when pressing "start muxing" or when quitting the application.
• MKVToolNix GUI: enhancement: the way the job queue is stored has been changed. Earlier all jobs were stored in the same file (or registry on Windows) as the preferences. Now they're stored in a sub directory called "jobQueue" with one file per queue entry.
• MKVToolNix GUI: enhancement: on Windows the preferences are not stored in the registry anymore, not even if the application has been installed. Instead they're stored in an INI file in the user's AppData\Local directory tree.
• MKVToolNix GUI: enhancement: the number of times the queue files are saved has been reduced. The queue files are also loaded only once on startup, not twice.
• MKVToolNix GUI: enhancement: if an instance is already running when the application is started a second time then the GUI requests that the already-running instance will be activated. Implements #1379.
• MKVToolNix GUI: new feature: added an option in the preferences for automatically switching to the job output tool whenever the user starts a job (e.g. by pressing "start muxing"). Implements #1376.
• MKVToolNix GUI: new job output and job queue feature: added a function for opening the output folder. Implements #1342.
• MKVToolNix GUI: new job output tool feature: added a way to clear the output, warnings and errors views. Implements #1356.
• MKVToolNix GUI: merge tool enhancement: added "Simple OGM-style chapter files (*.txt)" to the file selection dialog when selecting a chapter file. Implements #1269.

Bug fixes

• mkvmerge: bug fix: track statistics tags can be kept with the option "--engage keep_track_statistics_tags". This allows outputting them in verbose identification mode for easier parsing. Fixes #1351.
• MKVToolNix GUI: bug fix: fixed various crashes when dragging & dropping in all of the tree views (merge tool: files view, tracks view, attachments view; chapter editor: edition/chapter tree, chapter name list; job queue). Fixes #1365.
• MKVToolNix GUI: merge tool bug fix: attachments: sometimes changing values didn't apply the changes to all selected attachments depending on how they were selected. Fixes #1373.
• MKVToolNix GUI: merge tool bug fix: the automatically suggested description for new jobs contained the file name twice, even in the directory portion. Fixes #1378.
• MKVToolNix GUI: merge tool bug fix: if "set output file name automatically" is enabled then file names ending with a number in parenthesis (e.g. "Berlin (1962).mkv") will keep their number in the generated output file name. Fixes #1375.
• MKVToolNix GUI: merge tool bug fix: the GUI will keep manual changes to the output file name even if "set output file name automatically" is enabled. Fixes #1372.
• MKVToolNix GUI: bug fix: fixed the stereoscopy drop down box not being re-translated when the GUI language is changed. Fixes #1224.
• MKVToolNix GUI: chapter editor bug fix: it was possible to drop chapter entries on the top-level reserved for editions. Fixes #1369.
• MKVToolNix GUI: bug fix: fixed compilation when building without curl support. Fixes #1359.

Build system changes

• build system: stack protection is enabled when building with gcc on all platforms. For Windows DEP and ASLR is enabled. Implements #1370.
• build system: the Boost detection macros were updated from www.gnu.org resulting in better compatibility with bare-bones shells like dash.

Other changes

• MKVToolNix GUI: Windows: if the application has been installed then its settings will no longer be saved in the registry but in an INI file in the user's data application folder (e.g. C:\Users\mbunkus\AppData\Local\bunkus.org\mkvtoolnix-gui).

Version 8.2.0 "World of Adventure" 2015-07-18

New features and enhancements

• MKVToolNix GUI: chapter editor enhancement: the template for chapter names can now contain a number of places for the chapter number, e.g. '<NUM:3>'. The number will be zero-padded if there are less places than specified.
• MKVToolNix GUI: new chapter editor feature: implemented a function for renumbering chapters. This allows the user to automatically assign new chapter names to one level of sub-chapters with ascending numbers. Implements #1355.
• MKVToolNix GUI: new feature: the position of the tab headers of all tab widgets can be changed in the preferences. Implements #1334.
• MKVToolNix GUI: new feature: added an option for hiding the tool selector.
• MKVToolNix GUI: new job queue feature: added menu options for stopping the queue either immediately or after the current job has finished. Implements #1303.
• MKVToolNix GUI: new job queue feature: added a context menu option for setting jobs to status "pending manual start".
• MKVToolNix GUI: new merge tool feature: added context menu options for selecting all tracks of a specific type (e.g. all audio tracks). Implements #1197.
• MKVToolNix GUI: merge tool enhancement: the dialog shown after dragging & dropping files from external applications asking if those files should be added or appended now has an option to always add and never to show that dialog again. For new MKVToolNix installations the default is now to show this dialog again until the user deactivates it either in the dialog or in the preferences.
• MKVToolNix GUI: new feature: added additional ways to move selected files, tracks and attachments around: keyboard shortcuts (Ctrl+Up and Ctrl+Down) and optional buttons (those have to be enabled in the preferences). Using drag & drop remains possible. Implements #1279.
• MKVToolNix GUI: new merge tool feature: dragging files from external applications now allows you to create new mux settings and add the dropped files to those if the "always add dropped files" option is off. Implements #1297.
• MKVToolNix GUI: new feature: added support for displaying the queue progress on the task bar button. Implements #1335.
• MKVToolNix GUI: new merge tool feature: implemented support for re-ordering new attachments via drag & drop. Implements #1276.
• docs: added a Spanish translation of the man pages by Israel Lucas Torrijos (see AUTHORS).
• MKVToolNix GUI: enhancement: several drop down boxes have had their options renamed slightly to be more consistent overall and easier to select via the keyboard. Implements #1309.
• MKVToolNix GUI: enhancement: position and size of the several additional windows are saved and restored. These include: the preferences window, the dialog for additional command line options, the dialog showing the command line and the dialog for selecting the playlist to add. Implements #1317.
• MKVToolNix GUI: enhancement: the relative sizes of all splitters are saved and restored. Implements #1306.

Bug fixes

• mkvmerge, MKVToolNix GUI: bug fix: fixed the container type not being recognized properly by the GUI. Now the numerical container type ID is output in verbose identification mode by mkvmerge.
• MKVToolNix GUI: chapter editor bug fix: the file is not kept open so that you can open it in other applications at the same time.
• MKVToolNix GUI: bug fix: if a GUI language other than English was selected then the warning/error messages output by mkvmerge were not recognized properly and output in the wrong text views.
• MKVToolNix GUI: merge tool bug fix: fixed loading saved settings in which an appended file contains chapters/tags/attachments.
• mkvmerge: bug fix: fixed handling of MPEG transport streams where all PATs and PMTs have CRC errors. Fixes #1336.
• MKVToolNix GUI: bug fix: fixed the command line option used when the "fix bitstream timing info" check box is checked. Fixes #1337.
• MKVToolNix GUI: fix compilation with the upcoming Qt 5.5.0. Fixes #1328.
• MKVToolNix GUI: job queue bug fix: when re-starting a job the "date finished" field wasn't reset. Fixes #1323.
• MKVToolNix GUI: merge tool bug fix: the option "set output file name relative to first input file" caused the relative path to be applied each time a file was added resulting in the wrong directory. Fixes #1321.
• MKVToolNix GUI: merge tool bug fix: when adding a Blu-ray playlist and aborting the "select playlist to add" dialog the originally opened playlist was added even so.
• mkvmerge: bug fix: the MPEG-1/2 video code was causing an illegal memory access under certain conditions. Fixes #1217 and #1278.
• MKVToolNix GUI: bug fix: the "default subtitle character set" combo box required a selection without an option for using the system's default. An entry "– no selection by default –" has been added at the top.
• MKVToolNix GUI: bug fix: fixed parsing command line arguments to an already-running instance on Windows. Fixes #1322.
• MKVToolNix GUI: bug fix: fixed the combo boxes with languages, countries and character sets not being re-initialized after changes to the list of common languages/countries/character sets in the preferences. Fixes #1224.
• MKVToolNix GUI: chapter editor bug fix: fixed the menu entries "save to XML file" and "save to Matroska file" not being available after loading chapters until the tool or tab was changed. Fixes #1312.
• MKVToolNix GUI: bug fix: fixed labels and therefore the window becoming excessively wide with long file names. Fixes #1314.
• MKVToolNix GUI: merge tool bug fix: fixed the focus marker around combo boxes inside scroll areas not being drawn. Fixes #1310.
• MKVToolNix GUI: merge tool bug fix: fixed the stereoscopy mode being off by one. Fixes #1311.
• MKVToolNix GUI: merge tool bug fix: fixed the --append-to calculation if more than one file has been appended. Fixes #1313.

Version 8.1.0 "Psychedelic Postcard" 2015-06-27

Important notes

• mmg: bug fix: the deprecation warning will only be shown once. Fixes #1252.

New features and enhancements

• MKVToolNix GUI: merge tool enhancement: moved the "output file name" controls below the three tabs so they're always visible. Also added an option in the preferences to move them back inside the "output" tab. Implements #1266.
• MKVToolNix GUI: new chapter editor feature: added a function for generating a certain number of evenly spaced sub-chapter. Implements #1291.
• MKVToolNix GUI: new chapter editor feature: implemented loading chapter entries from Blu-ray playlists.
• MKVToolNix GUI: job queue enhancement: added menu entries for acknowledging both warnings and errors at the same time.
• MKVToolNix GUI: new watch jobs tool feature: the first tab showing the output of the current job has been changed to show the output of all jobs that have been run since the GUI's been started. This can be turned off in the preferences so that only the output of the currently running job is shown again. Implements #1263.
• MKVToolNix GUI: new merge tool feature: added an option to set a directory relative to the first input file as the default output directory. Implements #1261.
• MKVToolNix GUI: new feature: added a check box to the track/chapters/tags/attachments list. This offers an additional way of toggling the "mux this" state of entries, same as the drop down box on the right and as double-clicking on the item already did. Implements #1277.
• MKVToolNix GUI: new feature: added an option for always using the suggested description and not asking the user when adding a job to the queue. Implements #1288.
• MKVToolNix GUI: job queue enhancement: added the shortcut Ctrl+R for the menu entry "start all pending jobs". Implements #1287.
• MKVToolNix GUI: new feature: added an option to always treat files dragged & dropped external applications as being added circumventing the question what to do with them (add, append or add as additional parts). This option is enabled by default changing the default behavior from release 8.0.0. Implements #1259.
• MKVToolNix GUI: new feature: added an optional action after starting a job or adding one to the queue. This can be either to create whole new settings or to only remove all input files. Implements #1254.
• Installer for Windows: enhancement: associated the .mtxcfg files with MKVToolNix GUI. Implements #1258.
• MIME and desktop files: enhancement: added file associations for .mtxcfg with MKVToolNix GUI. Implements #1258.
• MKVToolNix GUI: new feature: implemented command line handling. You can open configuration files, add files to merge jobs, open files in the chapter or header editors. Implements #1209.

Bug fixes

• mmg: bug fix: fixed handling of the characters [ and ] in container and track properties.
• MKVToolNix GUI: merge tool bug fix: fixed various menu entries not working correctly after closing a tab or switching to another one. Fixes #1301.
• MKVToolNix GUI: merge tool bug fix: if "automatically set the file title" is enabled then the title field will be cleared after all source files have been removed.
• MKVToolNix GUI: merge tool bug fix: fixed a crash when enabling/disabling chapters coming from an appended file. Fixes #1293.
• MKVToolNix GUI: merge tool bug fix: it was possible to set the "default track flag" to "yes" for multiple tracks of the same type. Fixes #1289.
• MKVToolNix GUI: enhancement: the "open file" dialogs for the chapter and header editor tools will use the same directory that was last used in the merge tool. Fixes #1290.
• MKVToolNix GUI: bug fix: fixed reading the "default track" flag of tracks from added Matroska files. Fixes #1281.
• MKVToolNix GUI: merge tool bug fix: when appending files with multiple tracks of a type (e.g. multiple audio tracks) then all tracks of that kind would get assigned to the first track of that kind of the file they're appended to. Now the second audio track from the appended file is appended to the second audio track of the existing file, the third to the third etc. Fixes #1257.
• MKVToolNix GUI: merge tool bug fix: fixed automatic output file name re-generation when the mux status of tracks changes. Fixes #1253.
• mkvmerge: bug fix: fixed recognition of (E)AC-3 audio tracks using a FourCC of "ec-3". Fixes #1272.
• MKVToolNix GUI: merge tool bug fix: fixed attachments not being merged into the file in certain situations. Fixes #1260.
• MKVToolNix GUI: merge tool bug fix: fixed showing existing attachments present in source files in the "tracks, chapters, tags and attachments" list. Fixes #1256.
• MKVToolNix GUI: merge tool bug fix: the jobs created when appending files were incorrect resulting in an error message from mkvmerge. Fixes #1271.
• mkvpropedit: bug fix: fixed a warning about "edit specifications resolving to the same track" when changing the track properties and setting tags for the same track simultaneously. Fixes #1247.
• MKVToolNix GUI: merge tool bug fix: the output/destination file name is cleared when all files are removed. Fixes #1265.
• MKVToolNix GUI: merge tool bug fix: fixed command line escaping for empty arguments. Fixes #1270.
• MKVToolNix GUI: merge tool bug fix: fixed creating files without a title if one of the input files contains a file title. Fixes #1264.
• MKVToolNix GUI: bug fix: if the job removal policy is set to "remove even if there were warnings" then jobs that were muxed without warnings weren't removed. Fixes #1262.
• Build system: fixed inclusion of desktop files for the two GUIs for Debian/Ubuntu packages. Fixes #1255.

Version 8.0.0 "Til The Day That I Die" 2015-06-19

New features and enhancements

• MKVToolNix GUI: merge tool enhancement: drag & drop of files works even if no mux settings are currently open. Implements #1245.
• MKVToolNix GUI: job output enhancement: when clicking the "abort" button the GUI asks for confirmation before aborting. Both this check and the one when quitting the application can be turned off via an option in the preferences. Implements #1238.
• MKVToolNix GUI: new merge tool, header & chapter editor features: the GUI will ask for confirmation before closing or reloading tabs that have been modified and before quitting if there are modified tabs. This check can be disabled in the preferences. Implements #1211.
• MKVToolNix GUI: new merge tool feature: implemented an option that allows the user to set up a list of languages. When adding files only those tracks whose language is included in that list are set to be muxed by default. Implements #1227.
• MKVToolNix GUI: new feature: added an option in the preferences for disabling additional lossless compression for all track types. Implements #1174.
• mkvmerge, MKVToolNix GUI: new feature: added an option ("--engage keep_last_chapter_in_mpls") that will cause mkvmerge not to remove the last chapter entry from a Blu-ray play list file which mkvmerge normally does if that entry's timecode is within five seconds of the movie's end. Implements #1226.
• MKVToolNix GUI: new watch jobs tool feature: implemented estimating the remaining time for both the current job and the whole queue.
• MKVToolNix GUI: enhancement: the following dialogs can now be maximized: the "preferences" dialog; the "additional command line options" dialog; the dialog showing the command line; the dialog where the user selects the play list to add. Implements #1231.
• MKVToolNix GUI: merge tool enhancement: pressing delete when the source files view is focused will cause the selected source files to be removed. Implements #1225.
• MKVToolNix GUI: merge tool enhancement: implemented toggling of "mux this" for all selected tracks by either double-clicking on the tracks or pressing enter/return when the tracks view is currently focused. Implements #1225.
• MKVToolNix GUI: job queue enhancement: added a menu entry for starting all jobs pending manual start. Implements #1228.
• MKVToolNix GUI: enhancement: the text in all message box dialogs can now be selected & copied, even on Windows. Implements #1230.
• all: the detection whether or not the applications are installed on Windows is done by checking for the presence of a special file in the program folder instead of checking for an entry in the registry written by the installer. This enables users to try new portable versions without having to uninstall an installed version first as their settings will be kept separate now. A side effect is that compatibility with Windows XP should be restored. Implements #1229.
• mkvmerge: enhancement: if running in GUI mode (parameter "--gui-mode") then the progress will be output as the untranslated "#GUI#progress …%" in order to facilitate parsing of progress by GUIs.
• MKVToolNix GUI: new feature: added a "help" menu with links to several parts of the MKVToolNix documentation. Implements #1195.
• MKVToolNix GUI: job output tool: added a button for acknowleding the warnings/errors produced for the job shown. Implements #1210 and is the last part of the implementation of #1196.
• MKVToolNix GUI: enhancement: header editor: made the meaning of the "Reset" button clearer with a better label and an additional tool tip. Implements #1212.
• MKVToolNix GUI: enhancement: the tabs for the tools that haven't been implemented yet (extraction, info and the tag editor) are not shown anymore.
• MKVToolNix GUI: enhancement: the update check dialog showing the change log can now be maximized. Implements #1204.
• MKVToolNix GUI: new feature: implemented viewing the output of any job in the job queue.
• MKVToolNix GUI: new feature: implemented saving the job output to a file.
• MKVToolNix GUI: enhancement: language and country drop-down boxes will contain the common languages/countries both at the top as well as in the full list. Part of the implementation of #1200.
• MKVToolNix GUI: enhancement: the entry "Undefined (und)" is always shown at the top of the language drop-down boxes. Part of the implementation of #1200.
• MKVToolNix GUI: enhancement: the number of new warnings and errors are shown in the status bar. Both counters can be acknowledged via context menus on the status bar and in the job queue view. Part of the implementation of #1199.
• MKVToolNix GUI: enhancement: the number of jobs pending automatic/manual execution is listed in the status bar. Part of the implementation of #1199.
• MKVToolNix GUI: enhancement: the progress widget in the stats bar is not reset to 0 once all the jobs have been processed in order to signal the user that the jobs have actually been processed. Part of the implementation of #1198.
• MKVToolNix GUI: merge tool enhancement: a short animation of a moving icon is shown when a job is started or added to the job queue as a clue to the user what's happening and where to look for output. This animation can be disabled in the preferences. Implements #1198.
• MKVToolNix GUI: chapter editor enhancements: when selecting a chapter the the chapter name closest to the previously selected chapter name (or the first if there wasn't a previously selected one) is selected automatically.
• MKVToolNix GUI: chapter editor enhancements: when starting a new file a single edition and a single chapter are added automatically.
• MKVToolNix GUI: merge tool enhancement: the "add files" button has been re-labeled "add source files" in order to make it clearer that it cannot be used for adding attachments, even if the attachments tab is the currently selected tab.
• MKVToolNix GUI: merge tool & job queue tool enhancement: short tool tips will be shown for the files, tracks, attachments and jobs views telling the user to right-click for adding files and similar actions.
• MKVToolNix GUI: new feature for the merge tool, the header and chapter editors: if no file is open then "new" and "open file" buttons are shown.

Bug fixes

• MKVToolNix GUI: improved locating the mkvmerge executable on non-Windows systems. Fixes #1246.
• MKVToolNix GUI: chapter editor bug fix: dragging & dropping a file onto the chapter editor that cannot be parsed as chapters was causing a confusing warning about changed chapters not being saved.
• MKVToolNix GUI: merge tool bug fix: fixed several controls not changing their language correctly when the interface language is changed.
• mkvmerge: bug fix: fixed codec identification for MP2 audio read from MPEG program/transport streams. Fixes #1242.
• MKVToolNix GUI: job output bug fix: fixed displaying the estimated remaining time in tabs that have been opened for specific jobs. Fixes #1244.
• MKVToolNix GUI: header editor bug fix: fixed the editor assuming values were changed if a track is present whose language element is not present in the file. Fixes #1240.
• MKVToolNix GUI: bug fix: fixed the translation of the tool tip for the "close tab" buttons after changing the interface language. Fixes #1237.
• MKVToolNix GUI: bug fix: appended tracks will be disabled automatically when starting to mux if the track they're appended to has been disabled by the user.
• MKVToolNix GUI: fixed updating the number of pending jobs info in the status bar when manually starting jobs. Fixes #1236.
• MKVToolNix GUI: merge tool bug fix: fixed a crash when removing source files. Fixes #1235.
• MKVToolNix GUI: merge tool bug fix: the default settings for the "output directory policy" was changed to "same directory as the first input file". Fixes #1234.
• MKVToolNix GUI: bug fix: on Windows the job queue was accidentally always saved to and loaded from the registry even if the portable version was used.
• MKVToolNix GUI: job queue bug fix: fixed accidental duplication of lines when using drag & drop in certain ways. Fixes #1221.
• MKVToolNix GUI: bug fix: if a job is running when the user wants to quit requires confirmation from the user that the running job should be aborted. Fixes #1219.
• MKVToolNix GUI: bug fix: fixed the initial status display when viewing a job's output from the queue.
• MKVToolNix GUI: bug fix: running jobs cannot be removed from the job queue anymore. Fixes #1220.
• MKVToolNix GUI: bug fix: when starting the GUI old jobs from the queue were silently discarded if they included additional parts (e.g. VOBs).
• MKVToolNix GUI: bug fix: job queue: when saving the job queue jobs removed in the GUI were not removed from the stored settings.
• MKVToolNix GUI: bug fix: when viewing the job output of a job that hasn't been run yet the "save output" button was enabled.
• mkvmerge, mkvpropedit: bug fix: fixed an invalid memory access leading to a crash in the Base 64 decoder. Fixes #1222.
• MKVToolNix GUI: bug fix: fixed progress parsing for interface languages other than English.
• mkvmerge: bug fix: fixed key frame designation for video tracks in MP4 DASH files.
• mkvmerge: bug fix: the track statistics tags of Matroska source files are always discarded, no matter whether or not they're to be created for the output file. That way they won't be reported as track tags by mkvmerge's identification mode. This makes it easier for the user to create output files without track statistics tags as (s)he only has to use the option "--disable-track-statistics-tags" and not disable all the track tags as well anymore. Fixes #1186.
• mkvmerge, mkvinfo, mkvextract: bug fix: fixed a crash with certain types of invalid Matroska files. Fix for #1183.
• all: bug fix: removed some unused code thereby fixing compilation on OpenBSD (#1215).
• MKVToolNix GUI: bug fix: fix alignment of the tool contents with the tool selector at the bottom. Fixes #1194.
• MKVToolNix GUI: bug fix: header editor: fixed the track language shown if the element is not present in the file.
• MKVToolNix GUI: bug fix: when browsing the output file name the currently entered file name is pre-selected in the dialog. Fixes #1207.
• MKVToolNix GUI: job output bug fix: fixed superfluous empty lines in job output/warning/error output.
• MKVToolNix GUI: merge tool bug fix: when adding a VOB from a DVD the tree items for the additional parts (the other VOBs processed automatically) weren't shown.
• MKVToolNix GUI: merge tool: fixed the scroll bar not disappearing in the input tab if the window is high enough. Fixes #1193.
• build system: desktop files and icons were only installed if wxWidgets was enabled. Fixes #1188.
• man pages: clarify functionality of --default-duration. Fixes #1191.
• build system: bug fix: fixed running rake if no locale or one with an encoding other than UTF-8 is set. Fixes #1189.

Other changes

• MKVToolNix GUI: merge tool: the "save" button has been removed in favor of the "save…" menu entries. This also improves consistency with the other tools.

Version 7.9.0 "Birds" 2015-05-10

New features and enhancements

• MKVToolNix GUI: new feature: added context menu entries for tracks: "select all", "enable all" and "disable all".
• MKVToolNix GUI: new feature: implemented aborting the currently running job.
• MKVToolNix GUI: new feature: implemented the "additional command line options" dialog.
• MKVToolNix GUI: new feature in the chapter editor: added features "set the language/country of the selected chapter and its sub-chapters".
• MKVToolNix GUI: new feature in the chapter editor: added features "clamping time stamps of sub-chapters to their parent's time stamps", "expanding time stamps of chapters to encompass their sub-chapters' time stamps" and "shifting start and end time stamps by an offset".
• MKVToolNix GUI: new feature: the main window's size, position and state (maximized/minimized) is saved on exit and restored on startup.
• MKVToolNix GUI: new feature: the GUI is now fully translatable. The German translation has been completed for the GUI, too.
• MKVToolNix GUI: new feature: implemented changing the interface language.
• MKVToolNix GUI: enhancement: implemented often used subtitle character sets.
• MKVToolNix GUI: enhancement: implemented setting a user configurable subtitle character set by default.
• MKVToolNix GUI: enhancement: implemented the automatic removal of jobs configurable by the user.
• mkvmerge: enhancement for MPEG program stream handling: mkvmerge will only look for additional files automatically if the source file begins with "VTS_…" and just if it ends in a number. E.g. when reading "video_1.mpg" another file called "video_2.mpg" will no longer be read automatically. Implements #1164.
• MKVToolNix GUI: enhancement: display country names in addition to country codes.
• MKVToolNix GUI: enhancement: implemented often used languages and country codes.
• MKVToolNix GUI: chapter editor enhancement: implemented defaults for the language and country settings for newly created chapter names.
• MKVToolNix GUI: merge tool enhancement: added controls for mkvmerge's "reduce audio to its core" and "force NALU size length" features.
• MKVToolNix GUI: new feature: implemented the "Preferences" dialog (not all of the functionality the options refer to has been implemented yet, though).
• MKVToolNix GUI: merge tool enhancement: Implemented adding and append files and adding files as additional parts via drag & drop from external applications.
• MKVToolNix GUI: chapter editor enhancement: implemented opening files via drag & drop from external applications.
• MKVToolNix GUI: enhancement: The portable Windows version will store its settings in a file in the same folder instead of the registry.
• MKVToolNix GUI: enhancement: Qt's "Windows Vista" style is now used on Windows instead of the old, Windows 98-like "Windows" style.
• MKVToolNix GUI: merge tool enhancement: The merge tool has been re-written to be tabbed like the header and chapter editors allowing for multiple merge job settings to be open at the same time.
• MKVToolNix GUI: chapter editor enhancement: implemented re-ordering chapters and editions with drag & drop.
• MKVToolNix GUI: new feature: implemented the chapter editor.
• MKVToolNix GUI: merge tool enhancement: implemented adding attachments via drag & drop from external applications.
• MKVToolNix GUI: new feature: implemented the header editor.
• mkvmerge: enhancement: Implemented proper type output during identification for DTS-ES (extended surround) tracks. Implements #1157.
• MKVToolNix GUI: new feature: implemented the online update check.
• mkvmerge: new feature: Implemented support for the DTS-HD container format.
• mkvmerge: new feature: Implemented support for core-less DTS streams consisting solely of XLL extension sub-streams.
• mkvmerge: new feature: track selection can be done by language codes as well. Affects the options --audio-tracks, --button-tracks, --subtitle-tracks and --video-tracks. Works only for containers that actually provide a language tag. Implements #1108.

Bug fixes

• mkvinfo: bug fix: mkvinfo would exit with the wrong return code (0 instead of 2) if a non-existing file name had been given. Fixes #1182.
• all: fix compilation on macOS in common/command_line.cpp due to boost::range::filtered requiring a copyable functor. Fixes #1175.
• all: fix compilation on macOS in common/version.cpp due to wrong usage of std::stringstream and ostream operators. Fixes #1176.
• all: bug fix: fixed compilation with Boost 1.58.0. Fixes #1172.
• mkvmerge: bug fix: Fixed a segmentation fault during cleanup after Ctrl+C was pressed. Fixes #1173.
• mkvmerge: bug fix: fixed --sync not doing anything if --default-duration is used for the same track, too.
• mkvmerge: bug fix: fixed aborting file identification with an error message about "aac_error_protection_specific_config" that happened for some files. Fixes #1166.
• mkvmerge: bug fix: fixed specifying track properties like language or name for AC-3 cores embedded in TrueHD tracks when they're read from raw thd+ac3 files. Fixes #1158.
• mkvmerge: bug fix: MPEG-1/2 parser: fixed a long-standing issue that prevented mkvmerge from recognizing certain MPEG-1/2 video tracks and files if the frame's sequence numbers didn't follow a certain expected pattern. Fixes #1162 and probably others like #1145 or #1099.
• MKVToolNix GUI: merge tool bug fix: fixed the column headers on the "attachments" tab.
• mkvmerge: bug fix: The calculation of the width and height of H.265/HEVC video tracks did not take the conformance window (cropping) into account. Fixes #1152.
• mkvmerge: bug fix: Fixed the value of the DocTypeVersion header field if any of the Matroska elements CodecDelay, DiscardPadding or SeekPreRoll is used. This is the case for Opus tracks.
• mkvmerge: bug fix: Fixed the handling of E-AC-3 tracks in M2TS files if the AC-3 core and the extension are stored in separate packets.
• source code: bug fix: Accidental uses of the "long double" type have been converted to normal "double"s. This fixes compilation on platforms which don't support the "long double" type in combination with Boost::Math. Fixes #1150.

Build system changes

• build system: configure will now check for Qt by default. If at least v5.2.0 is found then the Qt versions of mkvinfo's GUI and the new mkvtoolnix-gui will be enabled. You can affect this detection with the options --disable-gui (turns off all GUIs; works the same as before), --disable-qt (will compile the wxWidgets GUI for mkvinfo and mmg) and --without-mkvtoolnix-gui (will compile the Qt version of mkvinfo's GUI but no mkvtoolnix-gui).

Other changes

• mkvmerge: Two more characters are now escaped in the container and track properties output in verbose identification mode: [ is replaced with \b and ] with \B. This is needed for reliable parsing by other programs, e.g. GUIs.
• all: permanently removed the build times tamp from the version information and the corresponding configure option.

Version 7.8.0 "River Man" 2015-03-27

New features and enhancements

• mkvmerge: enhancement: File type identification will output a more detailed description of the DTS type for DTS audio tracks (DTS-HD Master Audio, DTS-HD High Resolution, DTS Express or just plain DTS). Implements #1109.
• mkvmerge: new feature: Implemented support for DTS Express.
• all: new feature: added a Swedish translation of the programs by Kristoffer Grundström (see AUTHORS).
• mkvinfo (Qt interface): enhancement: implemented support for opening files via drag & drop.
• mkvmerge: enhancement: added an option (--engage no_delay_for_garbage_in_avi) for disabling deriving a delay from garbage in audio tracks in AVI files. Requested in #1137.

Bug fixes

• mkvmerge: bug fix: HEVC tracks which did not have an aspect ratio present in their sequence parameter set were copied incorrectly; the resulting sequence parameter set was invalid. Fixes #1081.
• mkvextract: bug fix: When extracting HEVC tracks mkvextract will use the same start code lengths that x265 uses (four bytes 0x00000001 for the first and video/picture/sequence parameter set NALs and three bytes 0x000001 for all others).
• mkvmerge: bug fix: The number of channels in DTS tracks with more than six channels is now recognized correctly by parsing the DTS HD extensions, too. Fixes #1139.
• mkvmerge: bug fix: Fixed handling of the BITIMAPINFOHEADER extra data size handling during merging and extraction for codecs like HuffYUV.
• mkvmerge: bug fix: When appending unframed HEVC/H.265 tracks and setting the default duration the second and all following source parts will use the same default duration as set for the first part. Fixes #1147.
• mkvmerge: bug fix: enabled the use of tags in WebM files. Tagging elements not supported by the WebM specs are removed. Fixes #1143.
• mkvmerge: bug fix: fixed detection of audio tracks in QuickTime files whose FourCC code is unknown to mkvmerge.
• mkvmerge: bug fix: fixed detection of video tracks in QuickTime files whose FourCC code is unknown to mkvmerge.
• mkvextract: bug fix: Fixed VobSub file naming when mkvextract is built against Boost::Filesystem older than 1.50.0. Fixes #1140.
• mkvmerge: bug fix: fixed detection of Cinepak video tracks in QuickTime files.
• mkvmerge: bug fix: fixed detection of PCM audio tracks in QuickTime files using the "raw " FourCC.
• mkvmerge: bug fix: fixed detection of tracks in Flash Video files for which the headers do not signal a track.
• mkvmerge: bug fix: fixed a segfault in the Flash Video file format reader.
• mkvmerge: bug fix: Fixed file type detection for MP3 files with big ID3 tags at the start of the file (e.g. if they contain cover images).
• mkvmerge: bug fix: The formula used for calculating the audio delay for garbage data at the start of tracks in AVI files has been fixed. Fixes #1137.

Build system changes

• build system: Boost's "Math" library is now required.

Other changes

• mmg: The change making the window wider by default has been reverted.

Version 7.7.0 "Six Voices" 2015-02-28

Important notes

• mkvmerge: removal: AAC: The hack for using the old codec IDs (e.g. A_AAC/MPEG4/LC/SBR) for AAC tracks has been removed. Those codec IDs have been deprecated for nearly ten years. Reading files that use those IDs will stay supported.

New features and enhancements

• mmg: new feature: added a button "toggle all" that enables or disables all tracks. It at least one track is currently disabled then all tracks are enabled when pressing that button. Otherwise (if all tracks are currently enabled) then they will all be disabled. Implements #1130.
• mmg: new feature: added a new checkbox "reduce to audio core" on the "format-specific options" tab that passes the new --reduce-to-core option to mkvmerge if enabled. Part of the implementation of #1107.
• mkvextract: new feature: implemented a mode for extracting cue information.
• mkvmerge: enhancement: The code for determining the time codes of AAC, AC-3, DTS, MP3 and TrueHD packets has been completely rewritten. This improves how timecodes are kept if the source container provides them in many cases.
• mkvmerge: new feature: Added an option "--reduce-to-core" that tells mkvmerge not to copy HD extensions for DTS tracks. Part of the implementation of #1107.
• mkvmerge: new feature: mkvmerge will now recognize TrueHD tracks inside MPEG transport streams that contain an AC-3 core as consisting of two tracks. Instead of always dropping the AC-3 part the user can simply select which tracks to keep. Part of the implementation of #1107.
• mkvmerge: new feature: mkvmerge will now recognize TrueHD+AC-3 files as consisting of two tracks. Instead of always dropping the AC-3 part the user can simply select which tracks to keep. Part of the implementation of #1107.

Bug fixes

• source code: Fixed the compilation on cygwin.
• documentation: The Dutch, Ukrainian and Chinese (Simplified) manual pages have contained only untranslated English strings since release 7.0.0. This was due to the files holding the translatable strings having being corrupted by a misbehaving tool in the build process. This has been rectified. Fixes #1134,
• mkvmerge: bug fix: Fixed reading all of the private codec data in AVIs from the 'strf' chunk for codecs that don't set biSize to include that data. Fixes #1129.
• mkvextract: bug fix: Fixed writing AVIs with ckSize fields that were too large. Fixes #1128.
• mkvmerge: bug fix: fixed determining the key frame status in certain AVIs (those whose dwFlags index field has more bits set than just 0x10).
• mkvinfo (Qt interface): bug fix: added WebM extensions to the known types in the "Open file" dialog.
• mkvextract: bug fix: Fixed writing AVIs with the wrong bit depth for video codecs that don't use 24 bits/pixel. Fixes #1123.
• mkvmerge: bug fix: Fixed recognition of E-AC-3 audio tracks in MPEG transport streams if they use the type ID 0xa1 (and the same for DTS tracks stored with type ID 0xa2). Fixes #1126.
• mkvextract: bug fix: Fixed VobSubs being written to the wrong directory if the output file name given by the user didn't have an extension but one of the directories contained a dot. Fixes #1124.
• mkvpropedit, mmg's header editor: bug fix: if updating the file required creating an EBML void for a 130 bytes long gap then the void element created was one byte too short resulting in an invalid file structure. Fixes #1121.
• mkvmerge: bug fix: If the MP4 track headers for MP3 tracks contain invalid values (number of channels is 0 or the sampling rate is 0) then mkvmerge will re-derive these parameters from the MP3 bitstream instead of ignoring that track.
• mkvmerge: bug fix: Matroska reader: track-specific tags weren't copied for tracks for which the pass-through packetizer was used (e.g. those with the codec ID A_MS/ACM) instead of a specialized one.

Build system changes

• build system: new feature: added configure options for building statically-linked binaries (--enable-static). Patches by Florent Thiéry. Implements #1119.

Other changes

• mkvmerge: removal: TrueHD: The hack for merging a sync frame and all following normal frames into a single Matroska packet has been removed as there are no players that can play such merged frames anyway.

Version 7.6.0 "Garden of Dreams" 2015-02-08

New features and enhancements

• all: new feature: added a Serbian (Latin) translation of the programs by Danko (see AUTHORS).

Bug fixes

• all programs: bug fix: Since release 7.0.0 the wrong exit code was used when warnings were finished (0 instead of 1). Fixes #1101.
• mkvmerge: bug fix: Appending chapters with the same chapter UID was dropping all sub-chapters from the one of the two merged chapters. Now the sub-chapters are merged recursively as well.
• mkvmerge: bug fix: The wrong Codec ID was written when reading PCM tracks from Matroska files in Big Endian byte order. Fixes #1113.
• mkvmerge: bug fix: If splitting was active and AC-3 tracks read from Matroska files were shorter than a split point then the following output file would contain an AC-3 packet with the timecode of 00:00:00 somewhere in the middle. Fixes #1104.
• mmg: bug fix: If a chapter track from a Matroska file is selected then the "language" drop-down box is disabled. Fixes #1105.
• mkvmerge: bug fix: On Windows the end-of-file-reached status wasn't tracked correctly for certain file operations. This could manifest in e.g. mkvmerge not finding tracks in MPEG transport streams when probing MPLS playlist files. Fixes #1100.
• mmg: bug fix: When scanning for play lists the window presenting the results listed some properties in an unescaped way (e.g. "\s" instead of spaces).
• mmg: bug fix: When adding MPLS files mmg was only offering to scan for more playlists if there were at least two additional MPLS files present. This has been fixed to one MPLS file (in addition to the one just added).

Version 7.5.0 "Glass Culture" 2015-01-04

New features and enhancements

• mkvmerge: new feature: implemented support for MP4 DASH files. Implements #1038.
• mkvmerge: new feature: implemented reading MPEG-H p2/HEVC video tracks from MP4 files. Implements #996.
• all: enhancement: improved exception messages that can occur when reading damaged Matroska files to make it clearer for the user what's happening. See #1089.
• mkvmerge: new feature: Added support for reading H.265/HEVC video tracks from MPEG transport streams. Implements #995.

Bug fixes

• mkvmerge: bug fix: If the target drive is full then a nicer error message is output instead of simply crashing due to an uncaught exception.
• mkvmerge: bug fix: Fixed reading MPEG transport streams in which all PATs and/or PMTs have CRC errors. Fixes #1100.
• all: bug fix: Re-wrote the whole checksum calculation code. This lead to a fix for the Adler-32 checksum algorithm that was triggered under certain circumstances. Adler-32 is used in mkvinfo's output (e.g. in summary mode or if checksums are activated), in the H.265/HEVC bitstream and TrueAudio (TTA) file headers.
• mkvmerge: bug fix: fixed handling of HE-AACv2 with object type "parametric stereo".
• mkvinfo: bug fix: track statistics: the duration (and therefore the estimated bitrate) was wrong for files in which the frame with the maximum timecode wasn't the last frame in the file. Fixes #1092.
• mkvmerge: new feature: implemented support for AAC in LOAS/LATM multiplex if read from MPEG transport streams or raw LOAS/LATM AAC files. Implements #877 and fixes the underlying issue in #832.
• all: bug fix: several fixes have gone into libEBML and libMatroska that prevent illegal memory access (both reading from and writing to unallocated addresses). The bugs #1089 and #1096 have thus been fixed.
• mkvinfo: bug fix: mkvinfo will abort with a proper error message if the first element found is not an EBML head element. See #1089.
• mkvinfo: bug fix: Timecodes output with ms resolution are now rounded to ms instead of simply cut off. Fixes #1093.

Build system changes

• build system: libEBML and libMatroska have been changed to provide pkg-config configuration files. Therefore MKVToolNix' build system has been switched to look for both libraries via pkg-config.
• build system: libMatroska v1.4.2 is now required as part of a fix for #1096.
• build system: libEBML v1.3.1 is now required as a part of a fix for #1089.

Version 7.4.0 "Circles" 2014-12-12

New features and enhancements

• all: new feature: added a Catalan translation of the programs by Antoni Bella Pérez (see AUTHORS).

Bug fixes

• mkvmerge: bug fix: mkvmerge was sometimes dropping lines from teletext subtitles read from MPEG transport streams. See #773.
• mkvmerge: bug fix: The PCM packetizer was producing wrong track statistics by disregarding the last packet's duration when reading PCM data from packaged sources (Matroska, MP4 files). Fixes #1075.
• build system: enhancement: configure will look for a system version of the pugixml library and use that instead of the bundled version if it is found. Fixes #1090.
• mkvextract: bug fix for chapter & tag extraction: If locale is set to a non-UTF locale (including C or POSIX) then no XML data was output at all even if the XML data contained ASCII characters only. Fixes #1086. This also fixes mkvextract writing two BOMs when extracting tags with the "--redirect-output" option on Windows.
• mkvinfo: bug fix: summary mode: reported frame types in block groups are now derived from the number of references found and not by the references' values.
• mkvmerge: bug fix: Fixed muxing open GOPs after I frames in MPEG-1/2 video (patch by Stefan Pöschel). Fixes #1084.
• mmg: bug fix: VP9 video tracks are accepted in WebM mode.
• mkvmerge: bug fix: Cherry-picked several commits from DivX' mkvmerge fork for improved HEVC handling. Fixes #1076.
• mkvmerge: bug fix: Fixed the handling of Big Endian PCM tracks read from MP4 files. Fixes #1078.

Version 7.3.0 "Nouages" 2014-10-22

New features and enhancements

• mkvmerge: new feature: implemented support for reading teletext subtitles from MPEG transport streams. They're converted to SRT-style subtitles (CodecID S_TEXT/UTF8). Implements #773.
• MKVToolNix GUI: implemented drag & drop in the files pane.
• MKVToolNix GUI: implemented drag & drop in the track pane.
• mkvmerge: new feature: added support for PCM in MPEG program streams (.vob – DVDs) and transport streams (.ts, .m2ts – Blu-rays). Implements #763.
• MKVToolNix GUI: implemented drag & drop in the job queue.
• MKVToolNix GUI: implemented storing the job queue when the application exits and retrieving it when it starts again.
• MKVToolNix GUI: implemented setting the file title automatically from added files that already have a title.

Bug fixes

• mkvmerge: bug fix: probing MPEG transport streams with certain types of broken MPEG-2 inside caused mkvmerge to exit with an error message. Such tracks are now ignored instead.
• mkvmerge, mmg's chapter editor: fixed the default value for the "language" element if it isn't present in a chapter XML file.
• mkvinfo (Qt version on Windows): bug fix: the console window is closed if the GUI is launched.
• mkvmerge: bug fix: Reading tracks from MPEG transport streams resulted in the track being cut off at points with a five minute gap in between frames. It is due to timecode wrap detection introduced in v6.9.0. As it affects subtitles the most the wrap detection has been relaxed for them.
• MKVToolNix GUI: fixed missing command line switch for audio sync/stretch.
• Installer: bug fix: the shortcut for the GUI preview on the desktop is removed upon uninstallation. If the user opts not to have shortcuts on the desktop then no shortcut is created for the GUI preview either.
• MKVToolNix GUI: fixed clearing the file/track/attachment lists when starting a new config or when loading an existing one.
• MKVToolNix GUI: implemented setting the output file name automatically in four different modes (don't set at all; place in previous output directory; place in fixed output directory; place in parent directory of first source file) with an option to make them unique by appending a running number.

Version 7.2.0 "On Every Street" 2014-09-13

Bug fixes

• mkvmerge: bug fix: Fixed calculating AC-3 delay from garbage data when reading AC-3 from AVIs. This stopped working in release 5.4.0 due to commit 97cc2121.
• mkvextract: bug fix: SSA/ASS files with sections after "[Events]" in their CodecPrivate are now handled correctly. Fixes #1057.
• mkvmerge: bug fix: Fixed handling certain edit list types in MP4 files that are used for positive track delays. Fixes #1059.
• source: Fixed compilation with Boost 1.56.0 which changed the "indexed" range adaptor in an incompatible way.
• mkvpropedit, mmg's header editor: bug fix: when editing files with missing track UID elements such an element will be generated automatically instead of crashing and leaving the file in an unplayable state. Part of a fix for #1050.
• mkvmerge: bug fix: Reading Matroska files with missing track UID elements will no longer cause mkvmerge to abort with an error. A warning is printed and a new unique track ID generated instead. Part of a fix for #1050.

Other changes

• MKVToolNix GUI: included a first preview version in the Windows installer and portable releases.

Version 7.1.0 "Good Love" 2014-07-27

New features and enhancements

• mkvmerge: enhancement: SSA/ASS: in addition to semicolons comments can now start with exclamation marks, too.

Bug fixes

• all: bug fix: Fixed file seeking code for "seek relative to end of file" case. Fixes #1035.
• mmg: bug fix: Selecting the root of the chapter editor tree will disable the language/country inputs properly as changing those fields doesn't make sense for the root.
• all: bug fix: if MKVToolNix on Windows is residing in a directory containing non-ASCII characters then translations weren't found. This has only been fixed for cases where those non-ASCII characters are part of the system's active code page.
• mkvmerge: bug fix: track statistics tags are not written for WebM files anymore as the WebM specification doesn't allow tags.
• mkvmerge: bug fix: Fixed wrong default duration for PCM audio tracks if the source file provides timecodes for that track. Fixes #1001 and #1033.
• mkvextract: bug fix: Fixed a crash when opening damaged/invalid Matroska files in all extraction modes. Fixes #1027.

Version 7.0.0 "Where We Going" 2014-06-09

New features and enhancements

• mkvmerge: enhancement: In addition to the track statistics tags "BPS", "DURATION", "NUMBER_OF_BYTES" and "NUMBER_OF_FRAMES" mkvmerge will write two more tags identifying which application wrote the statistics ("_STATISTICS_WRITING_APP") and when the file in question was written: "_STATISTICS_WRITING_DATE_UTC". "_STATISTICS_WRITING_APP" will always contain the same string contained in the segment info header element "WritingApp". "_STATISTICS_WRITING_DATE_UTC" will contain the same timestamp as in the segment info header element "Date", though "_STATISTICS_WRITING_DATE_UTC" is actually a string representation instead of an integer value. Additionally a tag named "_STATISTICS_TAGS" is written containing the names of the tags that mkvmerge has set automatically. It equals the following currently: "BPS DURATION NUMBER_OF_BYTES NUMBER_OF_FRAMES".
• mkvmerge: new feature: Added a global option for disabling writing the tags with statistics for each track: --disable-track-specific-tags.
• mkvmerge: new feature: When identifying a Matroska file in verbose identification mode track-specific tags will be output as well. The format is "tag_<tag name in lower case>:<tag value>", e.g. for a tag named "BPS" with the value "224000" the output would be "tag_bps:224000". Enhancement for #1021.
• mkvmerge: new feature: mkvmerge will write track-specific tags with statistics ("BPS" for the average number of bits per second, "DURATION" for the duration, "NUMBER_OF_BYTES" and "NUMBER_OF_FRAMES" for the track's size in bytes and its number of frames/packets). Implements #1021.
• mmg: enhancement: The chapter editor will only use fast-mode parsing when loading chapters from Matroska files.
• mkvmerge: enhancement: The last chapter entry read from MPLS files is removed if it is at most five seconds long. Patch by Andrew Dvorak (see AUTHORS).
• mkvmerge: enhancement: added the attachment UID to the verbose identification output of Matroska files.
• mmg: enhancement: the subtitle character set cannot be set anymore for subtitle tracks read from Matroska files as mkvmerge ignores that setting for said container anyway (text subs are always encoded in UTF-8 in Matroska).
• mmg: enhancement: mmg will look for the "mkvmerge" executable in the same directory as the "mmg" executable is located it if the location hasn't been set by the user on all operating systems (before: only on Windows). Improves detection if "mkvmerge" is not in the $PATH.

Bug fixes

• mkvmerge: bug fix: If a single subtitle track contains two or more entries at the same timecode then the cue duration and cue relative position elements written were wrong.
• mkvinfo: bug fix: fixed wrong progress percentage shown during saving the information to text files. Fixes #1016.
• mkvmerge: bug fix: Changed the file type detection order again. The text subtitle formats are now probed after those binary formats that can be detected quickly and unambiguously. This avoids some mis-detection if e.g. Matroska files as ASS text subtitles if they do contain such a track.
• all: bug fix: fixed invalid memory access in the cleanup procedures which only occurred if the output was redirected with the "--redirect-output" command line parameter.
• mmg: bug fix: Selecting a subtitle track correctly sets the "character set" drop-down box if no character set was set for this track. Fixes #1008.

Build system changes

• build system: Boost's "date/time" library is now required.

Version 6.9.1 "Blue Panther" 2014-14-18

Bug fixes

• mkvmerge: bug fix: fixed huge memory usage when probing files (it was reading the whole file into memory for that).

Version 6.9.0 "On Duende" 2014-04-18

New features and enhancements

• all: new feature: added a Brazilian Portuguese translation of the programs by Thiago Kühn (see AUTHORS).
• mkvmerge: enhancement: improved file type detection speed for text subtitle formats.
• mkvmerge: enhancements: trailing zero bytes will be removed from AVC/H.264 NALUs. Implements #997.

Bug fixes

• mkvpropedit, mmg's header editor: bug fix: fixed a failed assertion in libEBML when writing the same changes twice to certain files (those for which a seek head with a single entry pointing to the elements modified by mkvpropedit/mmg's header editor; e.g. x264 creates such files). Fixes #1007.
• mkvmerge: bug fix: reading fonts embedded in SSA/ASS files was sometimes truncating the attachments created from them. Fixes #1003.
• mkvmerge: bug fix: fixed display of very large IDs during attachment extraction.
• mkvextract: bug fix: during the extraction of chapters, tags or segment info XML files with the --redirect-output parameter the BOM (byte order mark) was written twice.
• mkvmerge: bug fix: MPEG TS: timestamp outliers are ignored if they differ at least five minutes from the last valid timestamp. Fixes #998.
• mkvmerge: bug fix: fixed timestamp assignment for AVC/H.264 videos in which recovery point SEIs occur in front of the second field of two interlaced fields.

Version 6.8.0 "Theme for Great Cities" 2014-03-02

Important notes

• mkvmerge: enhancement: The deprecated ISO 639-1 code "iw" is now recognized for Hebrew.

New features and enhancements

• mkvmerge, mkvextract: new feature: added support for H.265/HEVC by merging the patches from DivX/Rovi Corp. So far HEVC is only supported as elementary streams and read from other Matroska files.
• mkvmerge: enhancements: AVI reader: audio chunks with obvious wrong size information (bigger than 10 MB) will be skipped.
• mkvmerge, mkvextract, mkvpropedit: enhancement: attachments in Matroska files with a missing FileUID element are not ignored anymore even though they violate the specs. mkvmerge generates a new FileUID instead.
• installer: enhancement: the architecture (32bit vs 64bit) is mentioned in the interface.

Bug fixes

• mkvmerge: bug fix: The AC-3 packetizer will re-derive the sampling frequency and the number of channels from the bitstream. This way obviously invalid information from the source container like a sampling frequency of 0 Hz will be fixed.
• mkvmerge: bug fix: When reading M2TS files belonging to an MPLS playlist mkvmerge will now only copy packets whose timestamps lie between the "in time" and "out time" restrictions from the playlist's entry corresponding to that M2TS file. Fixes #985.
• all: Windows 64bit: fixed return value checks for opening files. Fixes #972.
• all: Windows: when redirecting the program's output with cmd.exe (e.g. "mkvinfo file.mkv > info.txt") the programs will no longer write two line feed characters (\r) per carriage return character (\n). Fixes #970.
• all: bug fix: Windows: messages written to the console (cmd.exe) are not re-encoded to the local charset and back to UTF-16 before they're handed over to ConsoleWriteW(). This fixes outputting Unicode characters to the console that are not part of the local charset. Fixes #971.
• extract: bug fix: using names of non-existing files in "attachments", "chapters", "cuesheet" or "tags" mode caused mkvextract to crash instead of emitting a proper error message. Fixes #964.
• mmg: bug fix: fixed the check for WebM-compatible track types for Opus.
• mkvmerge: bug fix: fixed muxing Sorenson v3 (SVQ3) video from QuickTime files.
• mmg: bug fix: mkvmerge's file identification is written to a temporary file with --redirect-output and from there into mmg instead of directly from mkvmerge. This prevents from character re-coding done by wxWidgets 3.0.0 on Windows. Fixes #959.
• installer: bug fix: the installation directory for 64bit builds will default to the proper directory ("C:\Program Files" instead of "C:\Program Files (x86)"). Fixes #956.

Build system changes

• mkvmerge: re-built with the 64bit build for Windows with a newer compiler version in order to fix #957. It was due to a bug in gcc: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56742

Other changes

• all: Windows: the default charset for the files created with "--redirect-output" has been changed from the system's local charset to UTF-8. Just like before it can be changed with "--output-charset". See #970.

Version 6.7.0 "Back to the Ground" 2014-01-08

New features and enhancements

• all: enhancement: The architecture (32bit/64bit) is mentioned in the version information of all programs.
• mmg: enhancement: The "additional parts" dialog will now show the files that make up an MPLS playlist. This is for informational purposes only and doesn't allow changing the playlist itself.
• mkvmerge: enhancement: unified codec names output by mkvmerge's identification mode for all file format readers.
• mmg: enhancement: The user can select the default subtitle character set to use for newly added subtitle tracks in the preferences dialog as requested in bug #948.
• mkvmerge: new feature: implemented reading DTS audio tracks from MP4 files (with ESDS object type ID == 0xA9 (decimal 169) or FourCC == 'DTS ' or 'dtsc').
• mkvmerge: enhancement: allowed muxing Opus to WebM files.

Bug fixes

• build system: bug fix for 64bit builds on Windows (x86_64-w64-mingw32): use the correct processor architecture via separate Windows manifest files. Fixes mmg and mkvinfo not starting due to "error 0x0000007b".
• mkvmerge: bug fix: Fixed a potential endless loop due to an integer overflow in the code removing AVC/H.264 filler NALUs.
• mkvmerge: bug fix: Fixed reading uncompressed PCM audio tracks from QuickTime/MP4 files in certain situations. Fixes #950.
• mmg: enhancement: Made the "scanned files" list box sortable by all columns. Fixes #954.
• mkvmerge: bug fix: Reading from an MPLS playlist file is now done as if the second and following files referenced in that playlist had been appended to the first file from that playlist. Before they were treated as if they were additional parts. Fixes #934.
• mmg: enhancement: a couple of fixes to tooltips: 1. Content correction for "splitting by chapters"; 2. no ugly re-formatting with wxWidgets 3.0.0 on Windows.
• mkvmerge: bug fix: Improved the AAC, AC-3 and MP3 header decoding error handling so that the corresponding parsing routines won't get stuck in endless loops when encountering certain garbage data patterns.
• mkvinfo: bug fix: when setting the language with --ui-language a few strings were still translated using the system's default language.
• mkvextract: bug fix: if the track headers were located at the end of the file (e.g. after modification with mkvpropedit or mmg's header editor) then mkvextract was writing files with a length 0 bytes.
• mmg: bug fix: the "playlist items" list box in the "select playlist file to add" dialog was showing the items in reversed order. Fixes #952.
• mmg: bug fix: the "select playlist file to add" dialog can now be resized, minimized and maximized. It also remembers its position and size during runs. Fixes #951.
• mmg: bug fix: fixed the tooltip for the subtitle character set drop-down box to match mkvmerge's actual behavior. Fixes #948.
• mkvmerge: bug fix: Fixed the mapping of the Opus element "seek pre-roll" and "pre-skip" to the Matroska elements "track seek pre-roll" and "codec delay". Remuxing Matroska files with Opus created with earlier versions of MKVToolNix is enough to fix such a file.
• mkvmerge: bug fix: fixing the bitstream timing information of H.264/AVC writes clean values for 25000/1001 frames per second video (e.g. de-telecined PAL @ 29.97).
• mmg: bug fix: fixed a crash in during drag & drop operations in mmg's chapter editor.

Build system changes

• build system: Ruby 1.9.x is now required.

Version 6.6.0 "Edge Of The In Between" 2013-12-01

New features and enhancements

• mmg: new feature: implemented drag & drop in the chapter editor. Implements #929.
• all: integrated the Portuguese translation. Although the translation files themselves had been added back in 6.3.0 that translation wasn't available for selection due to forgetfulness on my part.

Bug fixes

• mmg: bug fix: fixed an assertion in wxLogMessage() due to wrong format string/argument data types caused by changes in wxWidgets 3.0.0. See Debian bug #730273.
• mkvmerge: bug fix: improved resilience against MP4 files with obviously wrong entries in the 'sample size table' (STSZ) atom.
• mkvmerge: bug fix: improved VC-1 frame type detection so that it works even for streams without entry points.
• mkvinfo: bug fix: at most the lower 32bits of the track numbers and track UIDs elements were output, even if the element in the file used more bits. Fixes #935.
• mkvmerge: bug fix: fixed accessing invalid memory in the memory handling core routines. May be triggered by the code to remove filler NALUs introduced in v6.5.0. Fixes #931.
• mmg: bug fix: fixed the tracks list box on the input tab being invisible/0 pixels high with wxWidgets 2.9.x/3.x.
• mkvmerge: bug fix: The file detection code in the MPEG elementary stream reader had a logic error. Fixes #928. In practice this logic error didn't have any consequence.

Version 6.5.0 "Isn't she lovely" 2013-10-19

New features and enhancements

• mkvmerge: enhancement: filler NALUs will now be removed from framed H.264/AVC tracks (such as the ones read from Matroska/MP4 files) just like they have already been when handling unframed tracks.
• mkvextract: new feature: implemented support for extracting VP9 tracks into IVF files.
• mkvmerge: new feature: implemented support for VP9 read from IVF and Matroska/WebM files. Implements #899.
• mkvextract: enhancement: using the same track/attachment ID multiple times in "tracks", "attachments" or "timecodes_v2" mode will result in an error message instead of one empty file. Implements #914.
• documentation: Added a German translation of the man pages by Chris Leick (see AUTHORS).

Bug fixes

• mmg: bug fix: With wxWidgets 2.9.x/3.0.x debug message will no longer appear as modal dialogs but only go to the log window.
• mkvmerge: bug fix: fixed a crash when reading empty global tag files. Fixes #921.
• build system: bug fix: fix autodetection of Boost's library path if it is installed in the multiarch directories (e.g. /usr/lib/i386-linux-gnu or /usr/lib/x86_64-linux-gnu).
• mmg: bug fix: saved window widths were growing by 1 pixel each time mmg was exited.
• mkvmerge: bug fix: Reading OGM files with chapter entries not encoded in the system's local character set has been fixed. During identification the number of chapter entries is still output by removing any non-ASCII characters from the chapter entries. When muxing an additional warning is output if parsing those chapter entries fails, e.g. due to the format being wrong or due to the charset guessed wrongly. Fixes #919.
• mkvmerge: bug fix: The "duration" element was calculated wrong if the first element in the file wasn't the one with the smallest timestamp. To be precise, it was too short by the difference between the first timestamp and the smallest one (e.g with video sequences timestamped 80ms, 0ms, 40ms, 120ms... the duration was 80ms too short).

Version 6.4.1 "Omega Point" 2013-09-16

Bug fixes

• mkvmerge: bug fix: fixed packet ordering regression introduced in 6.4.0 if --default-duration is used for a track.

Version 6.4.0 "Pale Blue Dot" 2013-09-15

New features and enhancements

• mkvextract: new feature: Implemented extraction of Opus tracks into OggOpus files.
• mkvmerge: new feature: Implemented final Opus muxing.
• mkvinfo: new feature: Added support for the new Matroska elements DiscardPadding, CodecDelay and SeekPreRoll.

Bug fixes

• mkvinfo: bug fix: The track information summary enabled with -t/--track-info counted bytes in SimpleBlocks twice.
• mkvmerge: bug fix: CueRelativePosition was wrong for BlockGroups: it pointed to the Block inside the group instead of the BlockGroup itself. CueRelativePosition elements for SimpleBlock elements are not affected. Fixes #903.
• mmg: bug fix: The "jobs" folder will be created in the same mmg.exe is located in for the portable version. The installed version will still keep the folder where has already been (%APP_DATA%\mkvtoolnix\jobs).
• mmg: bug fix: Closing mmg's window while it was minimized caused mmg to appear hidden and unmovable when started the next time.
• mmg: bug fix: Fixed overly long startup time with wxWidgets 2.9.x (especially on Windows) by using alternative methods for initializing certain controls. Makes startup time on par with wxWidgets 2.8. See #893.

Build system changes

• build system: libMatroska 1.4.1 is now required for building.

Version 6.3.0 "You can't stop me!" 2013-06-27

New features and enhancements

• all: enhancement (Windows only): mmg will store its settings in a file "mkvtoolnix.ini" in the same folder mmg.exe is located in if MKVToolNix hasn't been installed via its installer. If it has been installed then the settings are stored in the Windows registry. This way MKVToolNix is truly portable.
• mmg: new feature: mmg's windows and dialogs will remember and restore their positions and sizes. Implements #878.
• all: new feature: added a Portuguese translation of the programs by Ricardo Perdigão (see AUTHORS).

Bug fixes

• mkvmerge: bug fix: When appending unframed AVC/H.264 tracks and setting the default duration the second and all following source parts will use the same default duration as set for the first part. Fixes #889.
• mkvmerge: bug fix: AVC/H.264 output module: fixed writing the wrong values if --fix-bitstream-timing-information is used. Fixes #888.
• mkvmerge: bug fix: FLV reader: Implemented deriving the video dimensions for FLV1 type tracks from the frame content if they're not given within a script tag. Fixes #880.
• mkvmerge: bug fix: Fixed handling MPEG transport streams with broken PES packet streams. Fixes #879 and #887.
• mkvextract: bug fix: mkvextract writes the correct value for the "block alignment" value in the header of WAV files (mostly affects mono PCM audio tracks). Fixes #883.

Version 6.2.0 "Promised Land" 2013-04-27

New features and enhancements

• mkvextract: enhancement: track extraction mode: If mkvextract encounters a broken file structure it will output the last timecode successfully read before resyncing. After the resync the first cluster timecode will be reported as well.
• mkvmerge: new feature: Selecting the lowest process priority with "--priority lowest" will cause mkvmerge to also select an idle/background I/O priority. Implements #863.
• mmg: new feature: Add control for new option "--fix-bitstream-timing-information".
• mkvmerge: new feature: Add option for fixing the timing information in video track bitstreams (--fix-bitstream-timing-information).
• mkvmerge: enhancement: Matroska reader: If mkvmerge encounters a broken file structure it will output the last timecode successfully read before resyncing. After the resync the first cluster timecode will be reported as well.
• all: enhancement on Windows: all programs now determine the interface language to use from the user's selected interface language (C function "GetUserDefaultUILanguage()"), not from the locale setting. Implements #852.

Bug fixes

• mkvmerge: bug fix: The option "--engage remove_bitstream_ar_info" will now work on AVC/H.264 tracks read from Matroska/MP4 files as well. Fixes #868.
• mmg: bug fix: mmg will now handle all file names given on the command line instead of only the first one. This allows things like opening several selected files with mmg in Windows, and mmg will add all of them. Fixes #867.
• mkvmerge: bug fix: The amount of memory required to store the cues during muxing has been reduced drastically. This is more noticeable the more video and subtitle tracks are muxed. Fixes #871.
• mkvmerge: bug fix: If splitting had been active then the elements "cue duration" and "cue relative position" were only written to the first output file.
• mkvmerge: bug fix: The "CTS offset" field of FLV files with AVC/H.264 video tracks is now read as a signed-integer field in accordance with the FLV specifications.
• mkvmerge: bug fix: DTS parsing: no more warnings about incompatible encoder revision numbers will be printed. Fixes #866.
• mkvmerge: bug fix: The parsing of the AAC AudioSpecificConfig structure (the bytes contained in Matroska's CodecPrivate and in MP4's "ESDS" atom) was fixed to support parsing the GASpecificConfig and the ProgramConfigElement if the channel configuration is 0. Fixes #872.
• mmg: bug fix: Loading chapters from Matroska files will open the file in read-only mode allowing to read from write-protected files.
• mkvmerge: bug fix: All entries in chapters imported from MPLS playlists were named "Chapter 0". The numbering has been fixed. Fixes #870.
• mkvmerge: bug fix: Fixed reading AVI files with audio chunks of size 0. Fixes #843.
• mkvmerge: bug fix: MPEG program stream reader: tracks with invalid video properties (e.g. width or height = 0) are ignored properly.
• mkvmerge: bug fix: The progress percentage was sometimes using the wrong input file as the reference if multiple files are read with the "additional parts" mechanism (on the command line: the syntax "( VTS_01_1.VOB VTS_1_2.VOB VTS_1_3.VOB )".
• mkvmerge: bug fix: Fixed one situation that could lead to mkvmerge aborting with the error message "Re-rendering track headers: data_size != 0 not implemented yet".
• mmg: bug fix: Using drag & drop to add playlists will no longer lock the dragging application (e.g. Windows Explorer) in D&D mode for the duration of the scan for other playlists.
• mmg: bug fix: The validation for the argument to "split by chapters" was wrongfully rejecting certain valid inputs (chapter number lists in which the second or any later chapter number was higher than 9).

Other changes

• installer: The installation directory will no longer be added to the PATH environment variable.
• mkvmerge: removal: Support for BZ2 (bzlib) and LZO (lzo1x) compression has been removed.

Version 6.1.0 "Old Devil" 2013-03-02

New features and enhancements

• mmg: new feature: When a playlist file (e.g. MPLS Blu-ray playlist) is added mmg can optionally scan all the other files in the directory that have the same extension and present the user with the results (including them playback time, total size, number of chapters, number and types of tracks). The user can then select the actual playlist file to add. The user can configure the minimum playlist duration in order to filter out too short ones.
• mmg: new feature: Added an option for disabling making the suggested output file name unique by adding a running number (e.g. ' (1)'). Implements #848.
• mmg: new feature: The output file name can be auto-set to be located in the first input file's parent directory. Implements #849.
• documentation: Added a Dutch translation of mmg's guide by René Maassen (see AUTHORS).
• mkvmerge: new feature: Implemented support for reading MPLS BluRay playlist files. All M2TS files referenced from an MPLS file are processed. Chapter entries from that MPLS file are used as well. Implements #765.

Bug fixes

• mkvmerge: bug fix: Fixed mkvmerge sometimes mistakenly detecting MPEG-1 video in MPEG program streams as AVC/H.264. Fixes #845.
• mkvinfo, mkvpropedit, mmg's header editor: bug fix: Fixed the description for the DisplayUnit element to include value 3 ("aspect ratio").
• mkvmerge: bug fix: Fixed handling chapters when splitting by parts (both parts/timecodes and parts/frames). Fixes #831.
• mkvmerge: bug fix: Fixed reading certain MP4 atoms with invalid length fields.
• mkvmerge: bug fix in common AAC code: Fixed wrong calculation of AAC packet size for malformed packets resulting in "safemalloc()" failing to allocate memory. Part of a fix for #832.
• mmg: bug fix: Selecting one of the pre-defined values from the "split by X" argument drop down box (e.g. "700M") was not leaving the selected entry in the drop down box but set it to empty instead.
• mkvmerge: bug fix: Fixed reading VP6 video from FlashVideo files. Fixes #836.
• mmg: bug fix: Fixed validating the argument for splitting parts by frame/field numbers. Fixes #835.

Version 6.0.0 "Coming Up For Air" 2013-01-20

Important notes

• mkvmerge: bug fix: ISO 639-2 language handling: The deprecated language codes "scr", "scc" and "mol" are replaced by their respective successors "hrv", "srp" and "rum". Fixes #803.

New features and enhancements

• mkvmerge: new feature: Implemented splitting by parts based on frame/field numbers ("--split parts-frames:" in mkvmerge). Implements #819.
• mkvmerge: new feature: Implemented reading VobSubs from MP4 files if they're stored in the Nero Digital way (track sub-type 'mp4s', ESDS object type identifier 0xe0). Implements #821 and the second half of #815.
• mmg: new feature: Command line options can be saved as default for new jobs by clicking a check box in the "add command line options" dialog.
• mkvmerge: new feature: Added experimental support for the Opus audio codec. Parts of an implementation of #779.
• mkvmerge, mmg: new feature: Implemented splitting by chapter numbers. Implements #504 and #814.
• mkvmerge: enhancement: Removed several warnings from the MPEG-2 video parser code about open GOPs, missing references. Those were too confusing for most users, even after being given additional information via email and FAQs.
• mkvextract: new feature: Implemented extraction of ALAC into Core Audio Format files (CAF). Implements #786.
• mkvmerge, mmg: new feature: Implemented splitting by frame/field numbers. Implements #771.
• mkvmerge: new feature: Implemented a reader for the Flash Video format (.flv). Implements #735.

Bug fixes

• mkvmerge: bug fix: Re-writing the track headers after they'd grown a lot (to more than the EBML void size located after them allowed for) led to an integer underflow. Then mkvmerge tried to write a void element the size of that integer (e.g. nearly 4 GB on 32bit platforms). Fixes #822 and #828.
• mkvmerge: bug fix in the MP4 reader: Fixed language code conversion from what is used in MP4 to the ISO 639-2 codes used in Matroska (e.g. convert from "deu" to "ger").
• mmg: bug fix: Fixed a crash in the chapter editor if the root was selected and the user used the "Set values" button.
• mkvmerge: bug fix: "text"-type tracks in MP4 files are only treated as chapters if their track ID is listed on a "chap" atom inside a "tref" track reference atom. Fixes #815.
• mmg: bug fix: Fixed consistency checks when appending files and at least one track is disabled.
• mkvmerge: bug fix: Matroska reader: Fixed finding the "segment info" element if it is located behind the clusters.
• mkvmerge: bug fix: MP3 parser code: Fixed skipping ID3 tags so that the header directly behind the ID3 tag is recognized properly. Fixes #747.
• mkvmerge: bug fix: MP4 reader: Fixed handling of edit lists if the edit list is used to adjust the track's timecodes by a fixed amount (either positive or negative). Fixes #780.
• mkvpropedit: bug fix: Giving a non-existent file name in tags mode will result in a proper error message. Fixes #806.

Build system changes

• Build system: Boost's "variant" library is now required.

Other changes

• Source distribution: source code archives (tarballs) will be compressed with xz instead of bzip2 from now on. The file name's extension will therefore change from ".tar.bz2" to ".tar.xz". The download URL changes accordingly.
• mkvmerge, mmg: removal: The 'header removal compression' method is not turned on by default anymore. This affects the following track types: AC-3, AVC/H.264, Dirac, DTS, MP3. The setting in mmg that turned it off by default has been removed.

Version 5.9.0 "On The Loose" 2012-12-09

Important notes

• mkvpropedit, mmg, mkvmerge: removal: removed support for the deprecated element TrackTimecodeScale.

New features and enhancements

• mkvmerge: enhancement: Dirac video code: Added four more pre-defined video types from Dirac spec v2.2.2 and two from Dirac Pro.
• mkvmerge, mmg: enhancement: Added options for turning off writing "CueDuration" elements ("--engage no_cue_duration") and "CueRelativePosition" elements ("--engage no_cue_relative_positions").
• mkvmerge: new feature: The element "CueRelativePosition" is written for all cue entries.
• mkvmerge: new feature: The element "CueDuration" will be written for all cue entries referring to subtitle tracks.
• mkvmerge: new feature: mkvmerge will write cues for subtitle tracks by default now.
• mkvinfo: new feature: added support for the new elements CueDuration and CueRelativePosition.

Bug fixes

• mkvmerge: bug fix: Fixed reading seek position values bigger than 2 GB. Fixes #805.
• mkvmerge: bug fix: Fixed appending non-empty tracks to empty tracks. Fixes #793.
• mkvmerge: bug fix: mkvmerge will now keep timecodes of PCM tracks from source files if they're available. Fixes #804.
• all: bug fix: EBML void elements will be skipped when reading structures from XML (e.g. chapters). Fixes #802.
• all: bug fix: EBML void elements will be skipped when saving structures to XML (e.g. chapters). Fixes #801.
• mkvmerge: bug fix: Fixed reading linked seek heads in Matroska files.
• mmg: bug fix: Fixed reading file names containing a '%' from a .mmg settings file (both normally saved files and the job queue files). Fixes #795.

Version 5.8.0 "No Sleep / Pillow" 2012-09-02

New features and enhancements

• mkvpropedit: new feature: Added support for adding, deleting and replacing attachments.
• mmg: new feature: chapter editor: Added support for the edition flags "hidden", "default" and "ordered" as well as the chapter values "segment UID" and "segment edition UID". Implements ticket #736.
• documentation: Added a Basque translation of mmg's guide by Xabier Aramendi (see AUTHORS).
• mkvmerge: new feature: Added support for reading ALAC (Apple Lossless Audio Codec) from CAF (CoreAudio), MP4 and Matroska files. Implements #753.
• mkvmerge: new feature: mkvmerge will remove stuffing bytes from MPEG-1/-2 video streams that are used to keep the bit rate above certain levels (the 0 bytes between slices and the following start code). Implements #734.
• mkvmerge: enhancement: SRT files can have spaces in their timecode line's arrow (e.g. "-- >").
• all: new feature: Added a Basque translation by Xabier Aramendi (see AUTHORS).

Bug fixes

• all: bug fix: Fixed a buffer overflow in the Base64 decoder routine.
• source: Various fixes for building with g++ 4.7.x and clang 3.1.
• mkvmerge: bug fix: MPEG transport streams whose timecodes wrap around/overflow are handled correctly. Fixes #777.
• mkvmerge: bug fix: MP2/MP3 audio tracks in MPEG program streams that contained garbage at the start of the very first packet caused mkvmerge to use uninitialized/random values for certain parameters (sample rate, number of channels, and therefore also during timecode calculation).
• mkvmerge: bug fix: Fixed audio/video synchronisation when reading MPEG program streams with MPEG-1/2 video with respect to B frames. Fixes #579.
• mkvmerge: bug fix: VC-1: mkvmerge will now only mark frames as I frames if a sequence header precedes them directly. Fixes #755.
• all: bug fix: The programs do not try to create directories with empty names anymore. This happened if the output file name for e.g. mkvmerge or mkvextract was only a file name without a directory component. With Boost v1.50.0 the call to "boost::filesystem::create_directory()" would result in an error if the name was empty (it didn't in earlier versions of Boost).
• mmg: bug fix: Fixed mmg not reading the very last line of mkvmerge's output. The result was that messages like "the cues are being written" did not show up in mmg and that the progress bar was not filled completely. Fixes #774.

Build system changes

• Build system: dropped support for gcc 4.6.0.
• Build system: Boost's "bind" library is not required anymore. The C++11 features from "functional" are used instead.

Version 5.7.0 "The Whirlwind" 2012-07-08

New features and enhancements

• mkvmerge: new feature: If "splitting by parts" is active and the last split part has a finite end point then mkvmerge will finish muxing after the last part has been completed. Implements #768.
• mmg, mkvinfo's GUI, all .exes: enhancement: Added new icons by Ben Humpert based on the ones by Eduard Geier (see AUTHORS).

Bug fixes

• mmg: bug fix: mmg will no longer print false warnings about a chapter UID not being unique. Fixes #760.
• mkvmerge, mkvpropedit, mmg: bug fix: All tools can now deal with 64bit UID values (chapter UIDs, edition UIDs etc).
• mkvmerge: bug fix: The DTS and TrueHD packetizers were not flushed correctly. In some rare circumstances this could lead to mkvmerge aborting with an error message about the packet queue not being empty at the end of the muxing process. Fixes #772.
• mkvmerge: bug fix: Fixed handling of tracks in QuickTime/MP4 files with a constant sample size. This fixes the other reason for the "constant sample size and variable duration not supported" error. Fixes issue 764.
• mkvmerge: bug fix: Tracks in QuickTime/MP4 files with empty chunk offset tables (STCO and CO64 atoms) are ignored. This fixes one of the reasons for the "constant sample size and variable duration not supported" error.
• mmg: bug fix: Fixed mmg's excessive CPU usage during muxing.
• mkvmerge: bug fix: Reading DTS from AVI files often resulted in the error message that DTS headers could not be found in the first frames. This has been fixed. Fixes issue 759.
• Documentation: Updated the cross-compilation guide and fixed the "setup_cross_compilation_env.sh" script.

Version 5.6.0 "Kenya Kane" 2012-05-27

New features and enhancements

• documentation: Added Spanish translation of mmg's guide by Israel Lucas Torrijos (see AUTHORS).
• mkvmerge: enhancement: mkvmerge was optimized to keep cluster time codes strictly increasing in most situations.
• all: Added a translation to Polish by Daniel (see AUTHORS).
• mmg: new feature: When adding a Matroska file that has either the "previous segment UID" or the "next segment UID" set then mmg will copy those two and the source file's segment UID into the corresponding controls on the "global" tab if they haven't been set before. Implements ticket 733.
• mkvmerge: new feature: The verbose identification mode for Matroska files will now includes the "segment UID", the "next segment UID" and "previous segment UID" elements.
• mkvmerge: enhancement: In "--split parts:" mode mkvmerge will use the output file name as it is instead of adding a running number to it if all the ranges to be kept are to be written into a single output file. Implements ticket 743.

Bug fixes

• mkvmerge: bug fix: SRT subtitle entries with colons as the decimal separator are accepted. Fix for issue 754.
• mkvmerge: bug fix: XML tag files with <Simple> tags that only contained a name and nested <Simple> were wrongfully rejected as invalid. Fixes issue 752.
• mkvextract: bug fix: Extraction of AVC/H.264 was completely broken after 2012-04-09 resulting in files with a length of 0 bytes.
• mkvextract: bug fix: mkvextract will no longer abort extracting H.264 tracks if it encounters a NAL smaller than its size field. Instead it will warn about it and drop the NAL.
• mkvmerge: bug fix: Writing more than two parts into the same file with "--split parts:" resulted in the time codes of the third and all following parts to be wrong. Fixes ticket 740.
• mkvmerge: bug fix: The "--split parts:" functionality was not taking dropped ranges into account when calculating the segment duration for files that more than one range was written to. Fixes ticket 738.
• mkvmerge: bug fix: The "--split parts:" functionality was producing a small gap between the first part's last packet's time code and the second part's first packet's time code if two parts are written to the same file. Fixes ticket 742.
• mkvmerge: bug fix: The "--split parts:" functionality was writing a superfluous and empty first part if the first range starts at 00:00:00. Fixes ticket 737.
• mmg, build system: Fixed building with wxWidgets 2.9.3.

Version 5.5.0 "Healer" 2012-04-06

New features and enhancements

• mmg: new feature: Added GUI controls for mkvmerge's "file concatenation" feature as "additional file parts". The user can chose which individual files are treated as if they were a single huge source file.
• mkvmerge, mmg: new feature: Added support for keeping only certain time code ranges from the source files with a new format to "--split": "--split parts:...". Implements ticket #518.
• mmg: new feature: Added an option in the preferences dialog called "clear jobs from the job queue after they've been run". Can be set to "only if run was successful", "even if there were warnings" and "even if there were errors". Defaults to off.
• documentation: enhancement: mkvmerge's man page has been updated with a list of valid XML tags for the chapters, tags and segment info XML file formats.
• mkvmerge: enhancement: Chapter XML files: mkvmerge can handle the "ChapterSegmentEditionUID" element.
• mkvmerge: enhancement: Segment info XML files: mkvmerge can handle the "SegmentFilename", "PreviousSegmentFilename" and "NextSegmentFilename" elements.
• mmg: enhancement: Added "mts" as yet another file extension for MPEG transport streams.
• mmg, mkvinfo's GUI, all .exes: enhancement: Added new icons by Eduard Geier. (see AUTHORS).

Bug fixes

• mkvmerge: bug fix: The handling of the "do not read other files" options (e.g. "=file.vob" and "( file.vob )") was broken for MPEG program stream files.
• mkvmerge: bug fix: Fixed a wrong assertion about minimum MPEG 1/2 video start code lengths. Fixes ticket 728.
• mmg: bug fix: Fixed a crash due to a missing argument for a format string when clicking on the "Browse" button for the track-specific tags.
• mkvextract: bug fix: mkvextract sometimes wrote undefined values to a single reserved header field when extracting into AVI files. Patch by buguser128k. Fix for ticket 727.
• mkvmerge: bug fix: AVC/H.264 mkvmerge was wrongfully writing a default duration of 60 frames/fields even if the source was signalling 60000/1001 frames/fields. The frame time codes have been correct already.
• mkvmerge: bug fix: Fixed time code calculation for (E)AC-3 tracks if the source container (e.g. MPEG transport streams) only provided time codes for some of the (E)AC-3 packets itself.

Build system changes

• Build system: Boost's "lexical_cast" and "type traits" libraries are now required.
• Build system: removed all files and documentation related to building MKVToolNix with Microsoft's Visual Studio because even the most recent version of Visual C++ does not support the C++11 features required for MKVToolNix.

Other changes

• mkvmerge, mkvextract, mmg: Re-write of the whole XML handling code. It now uses the "pugixml" C++ library instead of the "expat" library. Therefore "expat" is not required for building MKVToolNix anymore. And neither is Boost's "property tree" library. "pugixml" itself is included and not an external requirement either.
• mkvmerge, mkvextract: removal: Removed support for the CorePicture file format. It was mostly unused and relied on old code that will be removed soon.
• all: Updated the DTD files with the newly supported elements.

Version 5.4.0 "Piper" 2012-03-10

New features and enhancements

• mkvinfo: new feature: mkvinfo will output the track ID that mkvmerge and mkvextract would use for a track. This information is shown alongside the "track number" element in verbose mode and in the track summary in summary mode.
• mkvmerge, mmg: enhancement: The "--default-duration" in mkvmerge and the "FPS" drop down box in mmg now accept "p" or "i" as a unit -- as in e.g. "25p" or "50i". Several commonly used values have been added to mmg's "FPS" drop down box and others removed.
• mmg: enhancement: Added the values "50", "60" and "48000/1001" to the list of commonly used values for the "FPS" input field.
• mkvmerge: enhancement: mkvmerge will keep the "enabled" track header flag when muxing. mkvmerge will also output its value in verbose identification mode as "enabled_track".
• mkvmerge: enhancement: MicroDVD text subtitles are recognized as an unsupported format instead of an unknown format.
• doc: enhancement: Updates for option file usage and supported subtitle formats.

Bug fixes

• mkvmerge: bug fix: Fixed wrong calculation of the maximum number of ns per cluster in certain fringe cases if time code scale was set to "auto" mode ("--time code-scale -1"). Fix for bug 707.
• mkvmerge: bug fix: When using an external time code file with AVC/H.264 video the default duration will be set to the most-often used duration in the time code file.
• mkvmerge: bug fix: AVC/H.264 packetizer: The value given with "--default-duration" (after internal conversion from the unit given by the user to duration in nanoseconds) is now again interpreted as the duration of a frame and not of a field.
• mkvmerge: bug fix: SRT subtitles: time codes can contain the minus sign before any digit, not just before the first one.
• mkvmerge: bug fix: Sometimes non-AC-3 files were mistakenly for AC-3 after the re-write of the AC-3 handling code on 2012-02-26. This has been rectified. Fix for bug 723.
• mkvmerge: bug fix: Complete re-write of the time code handling code for AVC/H.264 tracks. Now handles several cases correctly: interlaced video, video with multiple or changing SPS with different timing information. The timing information is extracted from the bitstream. Therefore the user doesn't have to specify the default duration/FPS himself anymore. Fix for bugs 434 and 688.
• mkvmerge: bug fix: Complete re-write of the (E)AC-3 parsing and handling code. Dependent E-AC-3 frames are now handled correctly. Fix for bug 704.
• mkvmerge: bug fix: The width and height of H.264 video tracks with a pixel format other than 4:2:0 are now calculated correctly. Fix for bug 649. Patch by Nicholai Main (see AUTHORS).
• mkvmerge: bug fix: Fixed file type recognition and frame drops for VC-1 elementary streams that do not start with a sequence header but with frame or field packets instead.
• mkvmerge: bug fix: Fixed mis-detection as unsupported DV files (happened for e.g. PGS subtitle files).

Build system changes

• build system: The C++ compiler must now support the C++11 keyword 'nullptr'. configure checks for it. For GCC this means at least v4.6.0.
• build system: Boost's "rational" library is now required.

Other changes

• mmg: The warning that no default duration/FPS has been given for AVC/H.264 tracks has been removed.

Version 5.3.0 "I could have danced" 2012-02-09

New features and enhancements

• mkvmerge: new feature: mkvmerge will parse and apply the audio encoder delay in MP4 files that contain said information in the format that iTunes writes it. Fix for bug 715.
• mkvmerge: new feature: Implemented support for treating several input files as if they they had been concatenated binarily into a single big input file. Snytax is "mkvmerge -o out.mkv ( in1.ts in2.ts in3.ts )". This feature has already been present since version 5.1.0 but never been mentioned in the ChangeLog. Support for this feature in mmg is still missing.
• mkvmerge: enhancement: Identification output for Matroska files: Added the track number header field as "number" to the verbose identification mode.
• mkvmerge: enhancement: Identification output for Matroska files: Added a field "content_encoding_algorithms" that contains a comma-separated list of encoding algorithm IDs used for that track. For example, "content_encoding_algorithms:3" would indicate that header removal compression is used.
• mkvmerge: enhancement: Identification output for Matroska files: Added several fields to mkvmerge's verbose identification mode for tracks: UID, CodecID, length and content (as a hex dump) of the codec private data.
• mkvmerge: enhancement: Added video pixel dimensions to the output of "--identify-verbose" for Matroska files.

Bug fixes

• mkvmerge: bug fix: Blocks with "BlockAdditions" will no longer be muxed as "SimpleBlock" elements discarding the additions but instead as "BlockGroup" elements. This applies to e.g. WAVPACK4 tracks with correction files as the correction data is stored in "BlockAdditions". Fix for bug 713.
• mkvmerge: bug fix: Fixed some more issues with (E)AC-3 being misdtected as AVC elementary streams.
• mmg: bug fix: The header editor was sometimes creating two instances of an element if an element was added to the second or one of the later tracks. Fix for bug 711.
• mkvpropedit, mmg: bug fix: Trying to modify a file located in a path mounted with GVFS SFTP will no longer crash the programs. Instead an error message is output if an error occurs. Fix for bug 710.
• mkvmerge: bug fix: Fixed integer underflows in the read caching code resulting in invalid memory access. Happened in broken or incomplete files only. Fix for bug 709.
• mkvmerge: bug fix: Appending AVI, Matroska or MPEG program stream files with DTS audio tracks will not result in a warning that the appended DTS tracks might not be compatible. Fix for bug 705.
• mkvextract: bug fix for the "time codes_v2" mode: mkvextract will write one more time code than there are frames in the file. The last time code written will be the the sum of the last frame's time code and duration with the "last frame" being the one with the highest time code. Fix for bug 691.
• mkvmerge: bug fix: Fixed writing into paths on which a drive is mounted on Windows. Fix for bug 701.
• mkvmerge: bug fix: Fixed a segmentation fault in the DTS detection code. Fix for bug 698.
• mkvextract: bug fix: The track IDs used in the "time codes_v2" extraction mode are consistent again with the IDs that mkvmerge's identification reports and that mkvextract's "tracks" extraction mode uses. Fix for bugs 689 and 694.

Version 5.2.1 "A Far Off Place" 2012-01-02

New features and enhancements

• mkvmerge: enhancement: Removed the posix_fadvise() code. The application is using its own caching code which caused bad performance if the OS caching provided via posix_fadvise() is used as well.

Bug fixes

• mkvmerge: bug fix: Fixed certain DTS files being mis-detected as AC-3. Fix for bug 693.
• all: bug fix: Fixed compilation if gettext/libintl is not available.
• mkvmerge: bug fix: The MPEG program stream reader was reporting wrong progress percentage if multiple files were used since v5.1.0.
• mkvmerge: bug fix: If an MP4 file contains chapters encoded in a different charset than UTF-8 and --chapter-charset is not used then the error message shown is a lot clearer why mkvmerge aborts muxing. Before the error message was a generic "mm_text_io_c::read_next_char(): invalid UTF-8 character. The first byte:..."
• mkvmerge: bug fix: MPEG program streams in which a track suddenly ends and others continue or in which a track has huge gaps will no longer cause mkvmerge to try to read the whole file at once. This could lead to excessive swapping and finally mkvmerge crashing if no more memory was available.
• mkvextract: bug fix: The track IDs used for extraction are consistent again with the IDs that mkvmerge's identification reports. Fix for bug 689.
• mkvmerge: bug fix: Fix compilation if FLAC is not available. Fix for issue #13.

Build system changes

• build system: Added an option "--without-gettext" that allows for building without support for translations even if gettext itself is installed.
• build system: Added an option "--without-curl" that allows for building without CURL support even if CURL itself is installed.

Version 5.2.0 "I can't explain" 2011-12-18

New features and enhancements

• documentation: enhancement: Added a Ukrainian translation for mkvextract's man page.
• mkvmerge: enhancement: The VP8 output module will always re-derive frame types (key frame vs. non-key frame).
• mkvmerge, mkvextract: enhancement: Implemented input file buffering in mkvmerge and improved/implemented output file buffering in other tools.
• mmg, mkvinfo's GUI: enhancement: Added new icons based on the work of Alexandr Grigorcea (see AUTHORS).

Bug fixes

• mkvmerge, mmg: bug fix: Automatic MIME type recognition for TrueType fonts will result in "application/x-truetype-font" again instead of "application/x-font-ttf". Fix for bug 682.
• mkvinfo: bug fix: Various elements used to have a space between their names and their value's hex dump. In v5.1.0 that space was accentally removed. It has been added again. Fix for bug 583.
• mkvmerge: bug fix: Turn off input file buffering for badly interleaved MP4 files.
• mkvmerge: bug fix: Changed how mkvmerge assigns IDs to tracks in source files for Matroska and MP4 files. That way files whose headers contain the same ID for multiple tracks will work correctly. Fix for bug 681.
• mkvmerge: bug fix: VP8 read from AVI could not be put into WebM compatible files.
• mkvmerge: bug fix: Fixed a rare audio type mis-detection of MP2/MP3 audio tracks in MPEG program streams causing mkvmerge to abort with an error message.
• mmg: bug fix: Fixed a memory leak in mmg's header editor that caused the "open file" function to stop working after opening a few files. Fix for bug 679.

Version 5.1.0 "And so it goes" 2011-11-28

New features and enhancements

• all: enhancement: Made all EXEs declare their required access level privileges for Windows' User Access Control.
• mmg: enhancement: Made mmg DPI-aware on Windows (tested up to 144 DPI).
• mmg: enhancement: Added "ogv" to the list of known file extensions for "Ogg/OGM audio/video files". Implements bug 667.
• mkvmerge: enhancement: Added support for reading AAC tracks from MPEG transport streams.
• mkvmerge: enhancement: The verbose identification mode will add the properties "default_duration", "audio_sampling_frequency" and "audio_channels" if appropriate and if the corresponding header elements are present.
• mkvmerge: enhancement: "Castilan" has been merged with "Spanish" into "Spanish; Castillan" in the ISO 639 language list as both share the same ISO 639-2 code "spa".

Bug fixes

• mkvmerge: bug fix: Fixed more time code handling issues for video tracks in MPEG transport streams whose PES packets sometimes don't have a time code.
• mkvmerge: bug fix: mkvmerge will no longer create folders on drives it shouldn't create them on on Windows.
• mkvmerge: bug fix: Fixed bogus huge time codes sometimes occurring for AVC/H.264 video tracks read from MPEG transport streams.
• mmg: bug fix: mmg will append ".xml" to the file name entered when saving from the chapter editor if no extension was given.
• mkvinfo: bug fix: Improved skipping broken data on all operating systems.
• mkvmerge, mkvextract: bug fix: Skipping broken data in Matroska file often caused the program to abort on Windows. This has been fixed so that processing continues after the broken part. Fix for bug 668.
• mkvmerge: bug fix: Fixed reading VC-1 video tracks from Matroska files that don't use VC-1 start markers (0x00 0x00 0x01 ...).
• mmg: bug fix: A utility function for breaking a line into multiple ones was accessing invalid memory in rare situations causing mmg to crash. Could happen e.g. when adding a job to the job queue.
• mkvmerge: bug fix: mkvmerge will use DTS instead of PTS for VC-1 video tracks read from MPEG transport streams.
• mkvmerge: bug fix: Fixed reading MPEG transport streams on big endian systems.
• mkvmerge: bug fix: Relaxed the compatibility checks when concatenating VP8 video tracks.
• mkvmerge: bug fix: Fixed PCM audio in WAV sometimes being detected as DTS.

Build system changes

• build system: Boost's "Range" library is now required.
• build system: Boost v1.46.0 or newer is now required. As a consequence included copies of some of Boost's libraries have been removed (foreach, property tree).
• build system: The C++ compiler must now support several features of the C++11 standard: initializer lists, range-based 'for' loops, right angle brackets, the 'auto' keyword and lambda functions. configure checks for each of these. For GCC this means at least v4.6.0.

Other changes

• examples: Added XSLT 2.0 stylesheets in the "examples/stylesheets" directory for turning Matroska chapters into cue sheet and split points for "shntool" (useful for situations in which you have e.g. a live recording from a concert including chapters and want to create one audio file per song).
• Packaging: In v5.0.1 mmg's guide was accidentally moved into the "mkvtoolnix" Debian/Ubuntu package. It has been moved back into "mkvtoolnix-gui" again.

Version 5.0.1 "Es ist Sommer" 2011-10-09

New features and enhancements

• mkvmerge: enhancement: Implemented support for yet another way of storing E-AC-3 and DTS in MPEG transport streams.

Bug fixes

• mkvinfo: bug fix: Track information was not reset when opening more than one file in the GUI.
• mkvmerge: bug fix: The PGS subtitle output module was not outputting any packet in certain cases due to uninitialized variables.
• mkvmerge: bug fix: Fixed mkvmerge not finding any track in TS streams whose first PMT packet could not be parsed (e.g. invalid CRC).
• mkvmerge: bug fix: Fixed detection of TS streams that only contain one PAT or PMT packet within the first few KB but no others within the first 10 MB.

Build system changes

• build system: Updated the Debian/Ubuntu files to debhelper v7/quilt 3.0 format.

Version 5.0.0 "Die Wahre Liebe" 2011-09-26

New features and enhancements

• mkvmerge: new feature: MPEG TS: mkvmerge will extract the track languages from a corresponding clpi (clip info) file. That file is searched for in the same directory and in ../CLIPINF and must have the same base name but with the ".clpi" extension.
• mkvmerge: enhancement: Added new stereo mode options to match the current specs. The new options are "anaglyph_green_magenta" (12), "both_eyes_laced_left_first" (13) and "both_eyes_laced_right_first" (14).
• mkvmerge: enhancement: MPEG TS: Added support for HDMV PGS subtitles.
• mkvmerge: enhancement: MPEG TS: Added support for DTS HD Master Audio tracks.
• mkvmerge: enhancement: MPEG TS: Streams that are mentioned in the PMT but do not actually contain data are neither reported during identification nor muxed.
• mkvmerge: new feature: MPEG TS: Added support for reading the language code.
• mmg: enhancement: Added MPEG transport streams to the "add file" dialog file selector.
• mkvmerge: new feature: MPEG TS: Added support for normal DTS tracks.
• all: Added an Lithuanian translation by Mindaugas Baranauskas (see AUTHORS).
• mkvmerge: new feature: Implemented a MPEG transport stream demuxer.
• mkvmerge: enhancement: When looking for MPEG files with the same base name as a source file mkvmerge will be stricter what it accepts. The file name must consist of at least one char followed by "-" or "_" followed by a number. That will match VTS_01_1.VOB but not e.g. "some_series_s03e10.mpg".
• mkvmerge: enhancement: Sped up file identification by caching read operations.

Bug fixes

• mkvmerge: bug fix: The "writing application" element will not be localized but always be written in English.
• mkvextract: bug fix: Fixed attachment number displayed during extraction. Fix for bug 663.
• mkvmerge: Tons of fixes and additions to the MPEG transport stream demuxer.
• mkvmerge: bug fix: Opening MPEG files with numbers in their name from folders with e.g. Cyrillic names failed on Windows.
• mkvmerge: bug fix: Several elements are not written when creating WebM compliant files. In the segment headers: SegmentUID, SegmentFamily, ChapterTranslate, PreviousSegmentUID, NextSegmentUID. In the track headers: MinCache, MaxCache and MaxBlockAdditionID.
• mkvmerge: bug fix: Fixed identifying QuickTime/MP4 files that start with a 'skip' atom.
• mkvmerge: bug fix: Fixed a crash when reading AVI files with DTS audio tracks that do not contain valid headers in the first couple of packets. Fix for bug 646.

Build system changes

• build system: libEBML 1.2.2 and libMatroska 1.3.0 are required for building. If external versions are not found or if they're too old then the included versions will be used as a fallback.
• build system: configure will accept external versions of libEBML and libMatroska again. Minimum required versions are libEBML 1.2.1 and libMatroska 1.1.0.

Other changes

• mkvmerge: The --stereo-mode named option "anaglyph" was renamed to "anaglyph_cyan_red" to match the specs. The numerical value (10) remains unchanged.
• All: Updated the French translation with a complete set by DenB (see AUTHORS).
• mmg: mmg respects the XDG Base Directory Specification regarding its configuration files (environment variable $XDG_CONFIG_HOME/mkvtoolnix if set, otherwise ~/.config/mkvtoolnix).

Version 4.9.1 "Ich will" 2011-07-11

Bug fixes

• mkvmerge: bug fix: Fixed endless loop when reading AVI files on Windows if MKVToolNix was compiled with a gcc mingw cross compiler v4.4.x. Fix for bug 642.
• mkvmerge: bug fix: Fixed long file identification time caused by DV detection. Fix for bug 641.

Version 4.9.0 "Grüner" 2011-07-10

New features and enhancements

• all: Added an Italian translation by Roberto Boriotti and Matteo Angelino (see AUTHORS).

Bug fixes

• mkvmerge: bug fix: DV files are recognized as an unsupported container type. Fix for bug 630.
• mkvmerge: bug fix: Fixed handling block groups in Matroska files with a duration of 0.
• mmg: Various compatibility fixes for use with wxWidgets 2.9.x.
• mmg: bug fix: Fixed building with Sun Studio's C compiler.
• mkvmerge: bug fix: ISO 639-2 terminology language codes are converted to the corresponding bibliography code upon file identification (e.g. 'deu' is converted to 'ger').
• mkvinfo: bug fix: The time code scale is retrieved first before applying it to the segment duration.
• mmg: bug fix: Fixed populating the 'compression' drop down box according to what mkvmerge was compiled with.
• mkvmerge: bug fix: When a DTS track is read from a source file that provides time codes (e.g. Matroska files) then those time codes will be preserved.
• mkvmerge: Fixed remuxing certain VC-1 video tracks from Matroska files. Fix for bug 636.

Version 4.8.0 "I Got The..." 2011-05-23

New features and enhancements

• mkvmerge: enhancement: Added support for VobSub IDX files with negative "delay" fields.
• mkvpropedit: new feature: Added support for adding, replacing and removing chapters.
• mkvmerge: enhancement: File identification for tracks read from Matroska files with a codec ID of "A_MS/ACM" will show the track's format tag field if it is unknown to mkvmerge. Implements bug 624.
• mkvmerge: new feature: Track, tag and attachment selection via --audio-tracks, --video-tracks etc. can have their meaning reversed by prefixing the list of IDs with "!". If it is then mkvmerge will copy all tracks/tags/attachments but the ones with the IDs given to the option (e.g. "--attachments !3,6").

Bug fixes

• mmg: bug fix (Windows): mmg will no longer convert the "mkvmerge executable" from just "mkvmerge" into a full path name when writing its preferences to the registry upon existing.
• mkvmerge: bug fix: The 'doc type read version' EBML header field is only set to 2 even if a stereo mode other than 'none' is used for at least one video track. Fix for bug 625.
• mkvmerge: bug fix: Reading DTS files stored in 14-to-16 mode were read partially.
• mkvmerge: enhancement: mkvmerge will rederive frame types for VC-1 video tracks stored in Matroska files instead of relying on the container information. This fixes files created by e.g. MakeMKV that mark all frames as key frames even if they aren't.
• mkvmerge: bug fix: Fixed detection of AAC files with ADIF headers. Fix for bug 626.
• mkvmerge: bug fix: The 'doc type version' and 'doc type read version' EBML header fields are only set to 3 if a stereo mode other than 'none' is used for at least one video track. Fix for bug 625.
• mkvmerge: bug fix: Fixed handling AVIs with AAC audio format tag 0x706d and bogus private data size. Fix for bug 623.

Other changes

• All: Avoided a segmentation fault in gcc by not including a pre-compiled header if FLAC or CURL support is disabled.

Version 4.7.0 "Just Like You Imagined" 2011-04-20

New features and enhancements

• mkvmerge: enhancement: Added support for WAV and AVI files that use a WAVEFORMATEXTENSIBLE structure (wFormatTag == 0xfffe). Fix for bug 614.
• mkvmerge: enhancement: The EBML header values "doc type version" and "doc type read version" are both set to 3 if at least one of the video tracks uses the stereo mode parameter.

Bug fixes

• mkvmerge: bug fix: Fixed appending time code calculation for appended subtitle tracks if the subtitle tracks are read from complex containers (e.g. Matroska, MP4, AVI etc). Fix for bug 620.
• mkvextract: bug fix: Fixed extraction of MPEG-1/2 video tracks whose sequence headers change mid-stream but whose key frames are not all prefixed with a sequence header. Fix for bug 556.
• mkvmerge: bug fix: Fixed reading AAC tracks from AVI files with 7 bytes long codec data. Fix for bug 613.
• mmg: bug fix: The output file name extension will be updated on each track selection changed as well. The extension is based on the actually selected tracks, not on the presence of tracks of certain types. Fix for bug 615.
• mkvmerge: bug fix: mkvmerge was dropping the last full DTS packet from a DTS files if that file was not encoded in "14-in-16" mode and if the file size was not divisible by 16.
• mkvmerge: bug fix: Fixed huge slowdown when splitting by size is active with certain kinds of input files. Fix for bug 611.
• mkvinfo: bug fix: Fixed redirecting the output into a file with "--redirect-output"/"-r" and verbosity levels of 2 and higher.
• mkvpropedit, mmg header/chapter editor: bug fix: Fixed parsing Matroska files if mkvtoolnix is compiled with newer versions of libebml/libmatroska (SVN revisions after the releases of libebml 1.2.0/libmatroska 1.1.0).
• mkvmerge: bug fix: WAV files with unsupported format tags are rejected instead of being treated like containing PCM. Fix for bug 610.

Build system changes

• build system: For the time being the build system will always build and link statically against the internal versions of libEBML and libMatroska.

Version 4.6.0 "Still Crazy After All These Years" 2011-03-09

New features and enhancements

• mkvmerge: enhancement: HD-DVD subtitles are recognized as being an unsupported file format. This makes the error message presented to the user a bit clearer. Fix for bug 600.
• mkvpropedit: new feature: Added support for adding, replacing and removing tags.
• all: Added a translation for the programs into Turkish by ßouЯock (see AUTHORS).

Bug fixes

• build system: Fixed building the Qt version of mkvinfo's GUI (again). Fix for bug 576.
• mmg: bug fix: If the header editor finds 'language' elements with ISO-639-1 codes (e.g. "fra" instead of "fre" for "French") then it will map the code to the corresponding ISO-639-2 code. Fix for bug 598.
• mmg: bug fix: Fixed one of the issues causing mmg to report that it is configured to use an unsupported version of mkvmerge when the reported version was actually empty.
• build: Boost 1.36.0 or newer is required (up from 1.34.0). Also fixed building with v3 of Boost's filesystem library, e.g. with Boost 1.46.0 Beta 1 or newer.
• build system: Fixed compilation if configure choses the internal versions of libebml and libmatroska while older versions are still installed in a location named with "-I..." or "-L..." in CFLAGS/CXXFLAGS/LDFLAGS or with configure's "--with-extra-includes" and "--with-extra-libs" options.

Version 4.5.0 "Speed of Light" 2011-01-31

New features and enhancements

• mkvinfo: new feature: Added an option "--track-info" (short: "-t") that displays one-line statistics about each track at the end of the output. The statistics include the track's total size, duration, approximate bitrate and number of packets/frames.
• mmg: enhancement: The output file name extension is automatically set to ".mk3d" if the stereo mode parameter for any video track is changed to anything else than "mono" or the default value.
• mmg: enhancement: Added ".mk3d" to the list of known file name extensions for Matroska files.
• mkvmerge, mmg: enhancement: Updated the "stereo mode" parameter to match the current Matroska specifications.
• mkvmerge: enhancement: If mkvmerge encounters invalid UTF-8 strings in certain files or command line arguments then those strings will simply be cut short. Before mkvmerge was exiting with an error ("Invalid UTF-8 sequence encountered").
• all: new feature: Added online update checks. The command line tools know a new parameter "--check-for-updates". mmg has a new menu entry ("Help" -> "Check for updates") and checks automatically when it starts, but at most once in 24 hours. Can be turned off in the preferences. This function requires libcurl and is not built if libcurl is not available.
• mkvmerge: new feature: Added support for reading VP8 video from Ogg files. Implements bug 584.
• mkvextract: enhancement: mkvextract will exit with an error if the user specifies track IDs that do not exist in the source file. This works in the "tracks" and "time codes_v2" extraction modes. Fix for bug 583.
• mkvmerge: new feature: The "default duration" header field is set for DTS audio tracks.

Bug fixes

• mkvmerge: bug fix: Fixed an infinite loop when reading program stream maps in MPEG program streams. Part of a fix for bug 589.
• mkvinfo: bug fix: The hexdump mode was accessing invalid memory if the data to dump was shorter than 16 bytes. It was also outputting the values as characters instead of hexadecimal numbers. Patch by ykar@list.ru. Fix for bug 591.
• mkvmerge: bug fix: Avoid a crash due to invalid memory access if a source file name contains numbers (happens only if mkvtoolnix is built with MS Visual Studio). Fix for bug 585.
• docs: mkvextract's man page has been updated to match the program's expected command line syntax for the "time codes_v2" mode. Fix for bug 583.
• build system: Fixed building the Qt version of mkvinfo's GUI. Fix for bug 576.
• mkvmerge, mmg: bug fix: Option files could not contain options that started with '#' as they were interpreted as comment lines.
• mmg: bug fix: On macOS X the application type is set to a foreground application preventing issues like the GUI never getting focus.

Build system changes

• build: Building mkvtoolnix now requires libebml v1.2.0 and libmatroska v1.1.0 or later.
• build: enhancement: mkvtoolnix now includes libebml and libmatroska. The configure script will use them if either no installed versions of them is found or if the installed version is too old.
• build system: mmg's guide and its images are installed into the location given by configure's "docdir" variable. Patch by Cristian Morales Vega (see AUTHORS).

Other changes

• all: Made the French translation selectable in all programs.

Version 4.4.0 "Die Wiederkehr" 2010-10-31

New features and enhancements

• mkvmerge: new feature: If the name of an input file starts with '=' then mkvmerge will not try to open other files with the same name (e.g. 'VTS_01_1.VOB', 'VTS_01_2.VOB', 'VTS_01_3.VOB') from the same directory. A single '=' as an argument disables this as well for the next input file. Implements bug 570.
• mmg: new feature: Added an option to disable extra compression when adding tracks by default.
• mkvmerge: enhancement: The warning about subtitle entries that are skipped because their start time is greater than their end time now includes the subtitle number.
• mkvmerge: enhancement: When appending two Matroska files which both contain chapters the chapter entries of all editions will be merged even if the edition's UIDs were different to begin with. This is done based on the order of the edition. If both files contain three editions each then the chapters from the first edition in the second file will be put into the first edition from the first file; the chapters from the second edition into the second edition and so on.
• all: Added a translation of the programs into French by Trinine (see AUTHORS).

Bug fixes

• build system: bug fix: Installation no longer fails if xsltproc is available but the DocBook stylesheets aren't. Fix for bug 575.
• mkvmerge: bug fix: Made file type detection stricter for MP3, AC-3 and AAC files. This prevents mis-detection of other file types as one of these for certain files. Fix for bug 574.
• mkvmerge: bug fix: Fixed the usage of iterators with the STL "deque" template class. This caused mkvmerge to abort on systems which did not use the GNU implementation of the standard template library, e.g. OpenSolaris with the SunStudio compiler. Fix for bug 567.
• Build system: bug fix: 'drake install' did not work if the login shell was not POSIX compatible (e.g. fish). Fix for bug 559.
• mkvmerge: bug fix: The MPEG ES reader was accessing uninitialized data. This could lead to crashes or source files not being read correctly.
• mkvmerge: bug fix: Using "--no-video" on AVI files caused the video track to be mistaken for an audio track and included anyway. Fix for bug 558.

Version 4.3.0 "Escape from the Island" 2010-09-04

New features and enhancements

• mkvmerge: enhancement: Attachments will be rendered at the beginning of the file again. Fix for bug 516.
• mkvinfo: new feature: mkvinfo will show the H.264 profile and level for AVC/H.264 tracks along with the CodecPrivate element.
• mkvextract, mkvinfo, mkvpropedit: new feature: Added the option "-q" and its long version "--quiet". With "--quiet" active only warnings and errors are output. Fix for bug 527.

Bug fixes

• mkvmerge: bug fix: Appending tracks which would normally be compressed (e.g. with header removal compression) and turning off compression for those tracks with "--compression TID:none" (or the corresponsing option in mmg) was resulting in the second and all following appended tracks to be compressed all the same.
• mkvextract: bug fix: Errors such as 'file does not exist' did not cause mkvextract to quit. Instead it continued and exited with the result code 0.
• mkvmerge: bug fix: Certain frames in certain H.264/AVC raw tracks were handled wrong, e.g. files created by x264 versions starting with revision 1665. The situation occured if an IDR slice comes immedtiately after a non-IDR slice and the IDR slice has its frame_num and pic_order_count_lsb fields set to 0.
• mkvpropedit, mmg's header editor: Fixed a crash corrupting files in certain situations. If the updated header fields required filling exactly one byte with an EbmlVoid element and if the next Matroska element's "size" was already written with its maximum length (8 bytes) then the crash would occur. Such files are written by e.g. lavf. Fix for bug 536.
• All: bug fix: Fixed a couple of format strings in translations which could cause the programs to crash.
• mkvmerge: bug fix: Video tracks with a width or height of 0 are not read from AVI files anymore. Fix for bug 538.
• mkvmerge: bug fix: Fixed an error with losing packets (error message "packet queue not empty") when reading IVF (VP8) files using --default-duration on it.
• mkvmerge: bug fix: Fixed access to uninitialized memory in the MPEG-2 ES parser.
• mmg: bug fix: The 'total remaining time' shown by the job manager was totally wrong. Fix for bug 529.
• mmg header editor: bug fix: If a file was loaded that did not contain 'track language' elements and those elements were unchanged then they would be set to 'und' upon saving. Now they're left as-is, and when adding them to the file the drop-down box defaults to 'eng' being selected as per Matroska default value specifications. Fix for bug 525.
• mkvmerge: bug fix: The option "--quiet" was not working properly.
• mkgmerge: bug fix: mkvmerge was treating SSA/ASS subtitle files as audio files for the purpose of track selection (--no-subtitles / --no-audio). Fix for bug 526.

Build system changes

• build system: The build system has been changed from "make" to "rake", the Ruby based build tool. MKVToolNix includes its own copy of it so all you need is to have Ruby itself installed. The build proecss has been tested with Ruby 1.8.6, 1.8.7 and 1.9.1. Building is pretty much the same as before: "./configure", "./drake", "sudo ./drake install". Most of the build targets have similar if not identical names, e.g. "./drake install". You can override variables just like with make, e.g. "./drake prefix=/somewhere install".

Version 4.2.0 "No Talking" 2010-07-28

New features and enhancements

• mkvmerge: enhancement: Reading Matroska files: DisplayWidth & DisplayHeight values that are obviously not meant to represent pixels but only to be used for aspect ratio calculation (e.g. 16x9) are converted into proper ranges based on the track's PixelWidth & PixelHeight values and the quotient of DisplayWidth / DisplayHeight.
• mkvmerge: enhancement: Attachments will be rendered at the end of the file instead of at the beginning. The attachments will be placed after the cues but before the chapters. Fix for bug 516.
• mkvmerge: enhancement: Header removal compression has been enabled by default for MPEG-4 part 10 (AVC/H.264) video tracks with a NALU size field length of four bytes.
• mmg: enhancement: The taskbar progress is reset as soon as mkvmerge finishes/as soon as all jobs are done (Windows 7).
• mkvmerge: enhancement: Improved reading text files that use mixed end-of-line styles (DOS & Unix mixed).

Bug fixes

• mkvmerge: bug fix: mkvmerge was accessing invalid memory In certain cases, e.g. when appending Matroska files that use compression while turning compression off.
• mkvmerge: bug fix: Splitting output files by size was basing its decision when to create a new file on an uninitialized variable. This caused effects like a lot of small files being created with sizes much smaller than the intended split size.
• mkvmerge: bug fix: The speed with which mkvmerge skips garbage in DTS tracks has been greatly improved.
• mkvmerge: bug fix: Header removal compression has been deactivated for MPEG-4 part 2 (aka DivX/Xvid) video tracks due to incompatibility with packed bitstreams.
• mkvmerge: bug fix: Fixed reading AVC/H.264 tracks from AVI files if they're stored without NALUs inside the AVI. Was broken by a fix for handling AVC/H.264 in NALUs inside AVI.
• mkvmerge: bug fix: All readers that only handled file formats which do not contain more than one track did not respect the "--no-audio / --no-video / --no-subtitles" options. This applied to the following readers: AAC, AC-3, AVC/H.264, CorePicture, Dirac, DTS, FLAC, IVF, MP3, MPEG ES, PGS/SUP, SRT, SSA, TrueHD, TTA, VC-1, WAV and WavPack.
• mkvmerge: bug fix: Fixed invalid memory access in the PCM packetizer. Fix for bug 510.
• mmg: bug fix: When mmg starts it will check the entries in the file and chapter menu's list of recently used files and remove those entries that no longer exist. Fix for bug 509.
• mkvmerge: bug fix: Fixed a crash when reading Matroska files that were damaged in a certain way.

Version 4.1.1 "Bouncin' Back" 2010-07-03

Bug fixes

• mkvmerge: bug fix: Fixed invalid memory access in the header removal compressor. Fix for bug 508.
• mmg: bug fix: mmg will no longer add .mmg files opened by the job runner to the file menu's list of recently opened files. Fix for bug 509.

Version 4.1.0 "Boiling Point" 2010-07-01

New features and enhancements

• mkvmerge: enhancement: mkvmerge will report if it finds data errors in a Matroska file (e.g. due to storage failure or bad downloads). The position is reported as well as a periodic update as long as mkvmerge re-syncs to the next Matroska element.
• mmg: enhancement: The "compression" drop down box is enabled for all track types. That way "no compression" can be forced for those tracks mkvmerge uses "header removal" compression for.
• mkvmerge: enhancement: mkvmerge will start a new cluster before a key frame of the first video track. Fix for bug 500.
• mkvmerge: enhancement: The default cluster length has been increased to five seconds (up from two seconds).
• mkvmerge: enhancement: Implemented write caching resulting in faster muxes especially on Windows writing to network shares.
• mkvmerge: new feature: Added support for reading PGS subtitles from PGS/SUP files.
• mkvmerge: enhancement: mkvmerge uses header removal compression by default for AC-3, DTS, MP3, Dirac and MPEG-4 part 2 tracks.
• all: Added a translation of the programs into Spanish by Isra Lucas (see AUTHORS).
• docs: Added a Dutch translation for the man pages by René Maassen (see AUTHORS).

Bug fixes

• mkvmerge: bug fix: Fixed reading AVC/H.264 tracks from AVI files if they're stored in NALUs inside the AVI.
• mmg: bug fix: Matroska files read from/written to by the header and chapter editors will no longer be kept opened and locked. Fix for bug 498.
• mmg: bug fix: If mmg was called with "--edit-headers filename.mkv" then it crashed when the header editor was closed.
• mkvmerge: bug fix: mkvmerge will no longer report nonsensical progress reports (e.g. -17239182%) when reading Matroska files with all the flags "--no-audio --no-video --no-subtitles" enabled. Fix for bug 505.
• mmg: bug fix: Fixed a crash in the job runner when the total time was very big due to a division by zero.
• mkvmerge: bug fix: Specifying an FPS with "--default-duration" for AVC/h264 tracks in AVI files did not work. Fix for bug 492.
• mkvmerge: bug fix: Fixed an invalid memory access possibly causing a crash in the AC-3 detection code.
• mmg: bug fix: Changing mmg's interface language did not change the entries in the "command line options" dialog if that dialog had been opened prior to the language change.
• mkvmerge: bug fix: Fixed access to uninitialized memory when reading DTS tracks from AVI and Matroska files.
• mkvmerge: bug fix: The Matroska reader will use the MPEG audio packetizer for MP2 tracks instead of the passthrough packetizer.
• mkvmerge: bug fix: The Matroska reader did not handle compressed tracks correctly if the passthrough packetizer was used.
• mkvmerge: bug fix: The handling of Matroska files in which the 'default track flag' is not present has been fixed.

Build system changes

• Build system: enhancement: Improved the error reporting if certain Boost libraries are not found.

Other changes

• all: Added desktop files for mmg/mkvinfo, a MIME type file for .mmg files and icons to the installation procedure on Linux. Most files were contributed by Cristian Morales Vega (see AUTHORS).

Version 4.0.0 "The Stars were mine" 2010-06-05

New features and enhancements

• mmg: new feature: Added the estimated remaining time to the mux and job dialogs.
• all: Added a translation of the programs into Dutch by René Maassen (see AUTHORS).
• mmg: enhancement: The "mkvmerge executable" input in the preferences dialog is not read-only anymore. Final part of a fix for bug 490.
• mkvmerge: Added support for reading IVF files with VP8 video tracks.
• mkvextract: Added support for extracting VP8 video tracks into IVF files.
• mkvinfo: new feature: Added an option ("-z" / "--size") for displaying each element's size property. Elements with an unknown/infinite size are shown as "size is unknown".
• mmg: new feature: Added a checkbox for enabling "WebM" mode. This will also enable the same limitations that mkvmerge enables: Only VP8 and Vorbis tracks, no chapters, no tags. The output file name extension will be changed to ".webm" upon enabling the mode.
• mkvmerge: new feature: Neither chapters nor tags will be written to WebM compliant files. Warnings are issued if chapters or tags are found and not disabled.
• mmg: enhancement: Added "WebM" with the extension "webm" to the list of known file types.
• mkvmerge: new feature: Added support for muxing VP8 video tracks.
• mkvmerge: enhancement: mkvmerge will no longer put all clusters into a meta seek element resulting in smaller file size. The parameter "--no-clusters-in-meta-seek" has been renamed to "--clusters-in-meta-seek" and its meaning reverted.
• mkvmerge: enhancement: WebM compatibility mode will be turned on automatically if the output file name's extension is '.webm', '.webma' or '.webmv'.
• mkvinfo GUI: enhancement: Added "webm" to the list of known file name extensions for WebM files both for the "Open file" dialog and the drag & drop support.
• mkvmerge: new feature: Added options "--webm"/"--web-media" that enable the WebM compatibility mode. In this mode only Vorbis audio tracks and VP8 video tracks are allowed. Neither chapters nor tags are allowed. The DocType element is set to "webm".

Bug fixes

• all command line tools: bug fix: Fixed the output of eastern languages like Japanese or Chinese under cmd.exe on Windows.
• mkvmerge: bug fix: Fixed support for reading FLAC tracks from Ogg files following the FLAC-in-Ogg-mapping established with FLAC v1.1.1. Fix for bug 488.
• mmg: bug fix: mmg will output a warning if it is used with a mkvmerge executable whose version differs from mmg's version. Part of a fix for bug 490.
• mmg: bug fix: If adding a file fails mkvmerge's error message will be shown in a scrollable dialog instead of a normal message box. Part of a fix for bug 490.
• mkvmerge, mkvinfo, mkvextract: bug fix: Fixed handling of clusters missing a cluster time code element.
• mkvinfo GUI: bug fix: Frames for simple blocks were shown at the wrong place in the element tree.
• mkvmerge, mkvextract: Fixed handling of clusters with an unknown size.
• mkvinfo: bug fix: Fixed handling clusters with an unknown size.
• mkvmerge: bug fix: Matroska files without clusters are accepted as valid input files again.
• mkvinfo GUI: bug fix: Opening more than one file without restarting mkvinfo GUI could result in wrong time codes due to variables not being reinitialized.
• mkvinfo: bug fix: Binary elements shorter than 10 bytes were not output correctly.
• Build system: bug fix: The man page installation process only installed the English originals instead of the Japanese and Chinese translations.

Build system changes

• build: Building mkvtoolnix now requires libebml v1.0.0 and libmatroska v1.0.0 or later.

Other changes

• mkvextract: feature removal: Removed support for extracting FLAC tracks into Ogg FLAC files. Instead they're always written into raw FLAC files. The option "--no-ogg" has been removed as well.
• mkvmerge: feature removal: Removed support for the FLAC library older than v1.1.1.
• mmg: Added 'IVF' files to the list of known input file types.
• mkvmerge: change: mkvmerge will not write track header elements whose actual value equals their default value anymore.

Version 3.4.0 "Rapunzel" 2010-05-14

New features and enhancements

• all: Added a translation into Ukrainian by Serj (see AUTHORS).
• Windows installer: Added the choice to run the installer in the same languages that the GUIs support. Patch by Serj (see AUTHORS) with modifications by myself.
• all: Added a translation into Russian by Serj (see AUTHORS).

Bug fixes

• mkvmerge: bug fix: Fixed the handling of non-spec compliant AVC/H.264 elementary streams in Matroska files with the CodecID V_ISO/MPEG4/AVC. Fix for bug 486.
• mkvmerge: bug fix: mkvmerge will not output a message that it has extracted the display dimensions from AVC/H.264 bitstream if the source container (e.g. Matroska) overrides that setting. Fix for bug 485.
• mmg's header editor, mkvpropedit: Fixed crashes with files created by Haali's GS Muxer containing "content encoding" header elements.
• mkvextract: bug fix: Extracting SSA/ASS files which miss the "Text" column specifier in the "Format:" line are handled correctly. Fix for bug 483.
• mkvmerge: bug fix: Fixed a segfault when reading Matroska files containing level 1 elements other than clusters with a size of 0.
• mkvmerge: bug fix: Fixed a tiny memory leak. Fix for bug 481.

Build system changes

• build: Building mkvtoolnix now requires libebml v0.8.0 and libmatroska v0.9.0 or later.
• Build system: The LINGUAS environment variable determines which man page and guide translations will be installed.

Version 3.3.0 "Language" 2010-03-24

New features and enhancements

• mkvmerge: enhancement: Added a message in verbosity level 2 to the splitting code. It reports before which time code and after what file size a new file is started.
• All: enhancement: Added support for old Mac-style line endings (only '\r' without '\n') in text files.
• mmg: enhancement: Added the values "4483M" and "8142M" to the "split after this size" drop down box.
• mkvmerge, mkvextract: enhancement: Improved the error resilience when dealing with damaged Matroska files. When a damaged part is encountered reading will continue at the next cluster.
• mkvmerge: enhancement: Some Matroska files contain H.264/AVC tracks lacking their CodecPrivate element (e.g. files created by gstreamer's muxer). For such tracks the CodecPrivate element (the AVCC) is re-created from the bitstream. Fix for bug 470.

Bug fixes

• mkvmerge: bug fix: Fixed the default duration for interlaced MPEG-1/2 video tracks. Also added the 'interlaced' flag for such tracks. Patches by Xavier Duret (see AUTHORS). Fix for bug 479.
• mkvmerge: bug fix: Specifying a FourCC with spaces at the end will not result in an error anymore. Fix for bug 480.
• mkvmerge: bug fix: Time Codes for MPEG-1/2 tracks are calculated properly, especially for B frames. Patch by Xavier Duret (see AUTHORS). Fix for bug 475.
• mkvmerge: bug fix: Fixed a crash when reading Matroska files that contain Vorbis audio with in MS compatibility mode (CodecID A_MS/ACM). Fix for bug 477.
• mmg: bug fix: Fixed compilation if gettext is not available.
• Build system: Added project files and fixes for compilation with Microsoft Visual Studio 8. Patches by David Player (see AUTHORS).
• Installer: bug fix: A couple of start menu links to pieces of the documentation were broken. Added missing start menu links to translations of the documentation.
• mkvmerge: bug fix: The SRT reader skips empty lines at the beginning of the file.
• Build system: bug fix: Fixed the configure script and compilation on OpenSolaris.
• Installer: bug fix: The "jobs" directory in the application data folder is removed during uninstallation if the user requests it. Fix for bug 474.
• mkvextract: bug fix: Fixed granulepos calculation when extracting Vorbis tracks into Ogg files. Fix for bug 473.
• All: bug fix: The programs will no longer abort with an error message if a selected interface translation is not available. The "C" locale is used instead. Fix for bug 472.
• mkvmerge: bug fix: Fixed the handling of UTF-16 encoded chapter names in MP4/MOV files.
• mkvmerge: bug fix: MP4 files that do contain edit lists but whose edit lists do not span the entire file are processed properly. Such files are created by current x264 builds. Fix for bug 469.
• Build system: Fixed configure for systems on which 'echo' does not support the '-n' parameter (e.g. macOS).

Build system changes

• Build system: Sped up builds by using pre-compiled headers. Patches by Steve Lhomme (see AUTHORS) and myself.

Other changes

• All: A lot of changes preparing mkvtoolnix for use with the upcoming libebml2/libmatroska2 versions were applied. Patches by Steve Lhomme (see AUTHORS).

Version 3.2.0 "Beginnings" 2010-02-11

New features and enhancements

• docs: Added a Chinese Simplified translation for the man pages by Dean Lee (see AUTHORS).
• mmg: enhancement: Added an input field for the segment info XML file (mkvmerge's "--segmentinfo" option) on the "global" tab.
• mmg: enhancement: Changing the interface language does not require a restart anymore.
• mkvinfo: enhancement: Added the "EBML maximum size length" element to the list of known elements. Fix for bug 464.
• mmg: new feature: Added a control for mkvmerge's "--cropping" parameter.
• mmg: enhancement: Added the file extensions ".dtshd", ".dts-hd", ".truehd" and ".true-hd" to mmg's"'add/append file" dialogs.

Bug fixes

• mmg, mkvpropedit: Fixed another bug causing a crash writing chapters/other elements to existing Matroska files.
• Build system: bug fix: Improved detection of Boost::Filesystem for newer Boost versions.
• mkvmerge: bug fix: Outputting error messages about invalid XML files will not cause mkvmerge to crash on Windows anymore.
• mmg: bug fix: The jobs will be saved in the 'mkvtoolnix/jobs' sub-directory of the 'application data' folder instead of the 'jobs' folder in the current directory. On Windows this is the special 'application data' folder inside the user's profile directory, e.g. 'C:\Users\mbunkus\AppData\mkvtoolnix'. On non-Windows systems this is the folder '.mkvtoolnix' in the user's home directory. mmg's configuration file has also been moved from ~/.mkvmergeGUI to ~/.mkvtoolnix/config on non-Windows systems. Fix for bug 466.
• mkvextract: bug fix: Files are only opened for reading, not for writing, so that mkvextract will work on files the user only has read-only permissions for.
• mkvextract: bug fix: Modes 'attachments', 'chapters', 'tags' and 'cuesheet': mkvextract will output an error message if the file cannot be opened (e.g. because it does not exist or due to lack of access).
• mkvmerge: bug fix: Reading VOB files bigger than 4 GB was broken in v3.1.0 on 32bit platforms.
• mmg: bug fix: Tooltips were not word-wrapped on Windows.
• mkvextract: bug fix: "mkvextract --version" was only writing an empty string. Fix for bug 463.

Build system changes

• Build requirements changed: The GUIs for mkvtoolnix now require wxWidgets 2.8.0 or newer.

Version 3.1.0 "Happy Up Here" 2010-01-19

New features and enhancements

• documentation: Added a Chinese Simplified translation for mmg's guide by Dean Lee (see AUTHORS).
• documentation: Added a Japanese translation for the man pages by Katsuhiko Nishimra (see AUTHORS).
• mmg: enhancement: After muxing the "abort" button is changed to "open folder" which opens the explorer on the output file's folder. This only happens on Windows.
• mmg: enhancement: When constructing the output file name mmg will only suggest names that don't exist already by appending a number to the file name (e.g. resulting in "/path/file (1).mkv").
• mkvmerge: new feature: Added support for reading chapters from MP4 files that are stored in tracks with subtype 'text'. Such files are used e.g. on iPods/iPhones and can be created by HandBrake. Fix for bug 454.
• mkvmerge: enhancement: SRT files with negative time codes will are not rejected anymore. Negative time codes will be adjusted to start at 00:00:00.000.
• mkvextract: new feature: Added support for extracting Blu-Ray subtitles (CodecID "S_HDMV/PGS").
• mkvmerge/mmg: enhancement: Added an option '--segment-uid' for specifying the segment UIDs to use instead of having to use an XML file and '--segmentinfo'.

Bug fixes

• mkvmerge: bug fix: If the first input file was a Quicktime/MP4 file and all tracks from that file were deselected for muxing then mkvmerge would crash. Fix for bug 458.
• mmg: bug fix: The option 'AAC is SBR/HE-AAC' was not honored for appended AAC tracks. This could lead to mkvmerge aborting with an error that the track parameters did not match if it itself could not detect HE-AAC in the second file.
• mmg: bug fix: The output file name is checked for invalid characters before the muxing process is started. Fix for bug 455.
• mkvpropedit, mmg: bug fix: Files with an infinite segment size are handled correctly now. Fix for bug 438.
• mkvmerge: bug fix: Matroska files which have its 'tracks' element located behind the clusters are read correctly now.
• mmg: bug fix: The "tags" input box on the "general track options" tab was not updated when a track was selected. Fix for bug 453.
• mkvmerge, mmg: new feature: If a MPEG-2 program stream file is added to mkvmerge whose base name ends in a number then mkvmerge will automatically read and process all other files in the same directory with the same base name, same extension and different numbers. Those files are treated as if they were a single big file. This applies e.g. to VOB files from DVD images that are named VTS_01_1.VOB, VTS_01_2.VOB, VTS_01_3.VOB etc. mmg will output an error message if the user tries to add or append one of the other files that mkvmerge will process automatically (e.g. if the user has added VTS_01_1.VOB already and tries to append VTS_01_2.VOB). This also fixes bug 437.
• mkvmerge: bug fix: Zero-length frames in Theora bitstreams as created by libtheora v1.1 and later were dropped. Fix for bug 450.
• mmg: bug fix: On Windows 2000/XP the 'add/append file' dialog was not showing files with certain extensions (e.g. ".srt" or ".mp4") if the option "all supported media files" was selected. Fix for bug 448.

Build system changes

• Build requirements changed: mkvtoolnix requires Boost v1.34.0 or later. It requires the Boost::Filesystem library (with all Boost versions) and the Boost::System libraries (starting with Boost v1.35.0).

Other changes

• Installer: The installer will no longer offer to run mmg after it has been installed. On Windows setups where a normal user account doesn't have administrator privileges this caused mmg to be run as the user "Administrator" instead of the normal user account causing confusion and some things not to work, e.g. drag & drop.

Version 3.0.0 "Hang Up Your Hang-Ups" 2009-12-12

New features and enhancements

• mmg: enhancement: Added support for showing the muxing progress for both normal muxes and the job manager in Windows 7's taskbar.
• all: enhancement for Windows platforms: If one of the mkvtoolnix components is run without having been installed before then translations will be read from the directory the .exe is run from.
• configure: Added an option ('--without-build-timestamp') that omits the build timestamp from all version information so that two builds of mkvtoolnix can be byte-identical.

Bug fixes

• all: bug fix: The charset for output in cmd.exe for non-English interface languages has been fixed on Windows Vista and Windows 7.
• mkvpropedit, mmg: bug fix: Editing headers of files created by HandBrake would cause crashes and/or corrupted files after saving. Fix for bug 445.

Version 2.9.9 "Tutu" 2009-11-25

New features and enhancements

• mkvmerge: enhancement: A single '+' causes the next file to be appended just like putting the '+' in front of the file name.
• mmg: enhancement: The file dialogs for 'add file'/'append file' will show files with extensions in all uppercase as well. This only applies to file systems that distinguish between case (e.g. most of the non-Windows, non-FAT world). Fix for bug 433.

Bug fixes

• mmg: bug fix: The warning that no FPS has been entered for AVC/H.264 elementary streams is not shown anymore for appended tracks (only once for the first track that they're appended to).
• mkvmerge: bug fix: The pixel cropping parameters were not kept when muxing from Matroska files.
• mkvmerge: bug fix: The display width/height parameters were not kept when muxing from Matroska files if the bitstream of the track contained different aspect ratio information. Now the order is "command line" first, "source container" second and "bitstream" last.
• mkvmerge: bug fix: Fixed the subtitle track selection for AVI files.
• mkvmerge: bug fix: The integrated help ('--help') contained wrong information about the '--sync' option. Fix for bug 435.
• mkvmerge: bug fix: Missing ChapterLanguage elements were assumed to be set to "und". They're now assumed to be "eng" in accordance with the Matroska specifications.

Other changes

• Added a new program 'mkvpropedit' that can modify certain properties of existing Matroska files. It is mmg's header editor, just for the command line.

Version 2.9.8 "C'est le bon" 2009-08-13

New features and enhancements

• mmg/header editor: enhancement: Implemented a considerable speedup in the processing of large files.
• mkvinfo: enhancement: Implemented speed-ups of up to 50% for middle to larger files.

Bug fixes

• mmg: bug fix: The inputs for time code files and the language are deactivated if the user has selected a track that will be appended to another track. Fix for bug 432.
• mmg: bug fix: mmg will handle multiple consecutive spaces in the options given with "add command line options" properly and not cause mkvmerge to exit with misleading error messages anymore. The "add command line options" dialog has been reordered, and the drop down box in it is now read-only. Fixes for bug 429.
• doc, mmg: bug fix: The tooltip and documentation for the 'delay' option was misleading. Fix for bug 420.
• mmg/header editor: bug fix: The header editor copes better with files that do not contain all mandatory header fields. The missing ones are added or assumed to be default values.
• all: bug fix: Selecting the translations with the "--ui-language" option did not work on macOS X.
• mkvmerge: bug fix: Fixed an invalid memory access in the VobSub reader module. Fix for bug 426.
• mmg: bug fix: Tracks added from Matroska files did not get their 'default track' drop down box set correctly if the flag was 'off' in the source file and no other track of its kind hat its 'default track' flag set.
• mkvmerge: bug fix: mkvmerge was wrongly turning the 'default track' flag back on for the first subtitle track muxed from a Matroska file if none of the subtitle tracks muxed had their 'default track' flag set in their source files and if the user didn't use the '--default-track' option for setting that flag explicitely.
• mmg: bug fix: Running mkvmerge on Windows from an installation directory with two spaces in the path (e.g. "C:\Program Files\Video tools\mkvtolnix") crashed mmg when the user started muxing. Fix for bug 419.
• mmg: bug fix: Files for which all tracks were disabled were left out from mkvmerge's command line so that tags, chapters and attachments were not copied from such files either.
• mkvmerge: bug fix: Appending MPEG4 part 2 video tracks from Matroska files which contain aspect ratio information will not result in an error message "connected_to > 0" anymore. Fix for bug 427.
• mkvmerge: bug fix: Fixed the audio sync for tracks read from AVI files containing garbage at the beginning. Fix for bug 421.
• mmg: bug fix: Trying to save chapters that contain editions without a single chapter entry does no longer result in a crash but a descriptive error message instead. Saving empty chapters to a Matroska file will remove all chapters contained in the file instead of not doing anything. Fixes for bug 422.
• mkvmerge: bug fix: Fixed reading AVC/H.264 video tracks from OGM files. Fix for bug 418.
• mmg: bug fix: The chapter language for chapters copied from source files (e.g. Matroska, MP4 or OGM files) is only changed if the user has selected any language other than "und". Fix for bug 420.
• mmg: bug fix: mmg will no longer show an error message if the user has not selected a country in the "chapters" tab of the preferences dialog.

Version 2.9.7 "Tenderness" 2009-07-01

New features and enhancements

• mmg: new feature: The list of common languages can be configured by the user via the 'preferences' dialog.
• mkvmerge, mmg: new feature: The language for chapters read from files such as OGM and MP4 files can be chosen with the --chapter-language command line option. Fix for bug 399.
• mkvmerge, mmg: new feature: Chapter and tag information contained in source files are now shown in the "track" selection box and can be toggled individually. The user can set the charset for chapters if the source file's chapters are not encoded in UTF-8 (e.g. in some OGM/MP4 files). The old file specific checkboxes "no tags" and "no chapters" have been removed. Fix for bug 400.
• mmg: enhancement: If the user selects the option "Verify" from the "Chapters" menu then a message will be shown even if the validation succeeded. Fix for bug 410.

Bug fixes

• mkvmerge: bug fix: The handling of NVOPs in native MPEG4 part 2 video storage has been improved. NVOPs are dropped again both from packed and non-packed bitstreams, and time codes are adjusted to match the number of dropped frames.
• mkvmerge: bug fix: The I frame detection for AVC/H.264 video has been fixed. Sometimes a single I frame was recognized as two or more consecutive I frames resulting in garbled display and wrong timestamps. Fix for bug 415.
• all: bug fix: The programs do not try to close iconv handles -1 anymore which resulted in segfault during uninitialization on some platforms (e.g. FreeBSD, macOS X). Fix for bug 412.
• mkvmerge: bug fix: Complete rewrite of the code for the native storage mode for MPEG4 part 2 video tracks. Fix for bug 298.
• mkvmerge: bug fix: Made the detection rules for raw MP3, AC-3 and AAC audio files more strict. This avoids a mis-detection of certain files, e.g. AVC/H.264 ES files being misdetected as MP3 files. Fix for bug 414.
• mkvmerge: bug fix: Appending MP4 or OGM files with chapters will merge the chapters from all appended files and not just take the chapters from the first file and discard the chapters from the following files. Fix for bug 397.
• mmg: bug fix: The chapter editor was corrupting Matroska files if the chapters were saved to a file twice in a row without reloading them from the Matroska file.
• mmg/mkvmerge: bug fix: Adding MP4 files with chapter entries that are not encoded in UTF-8 will not result in mkvmerge aborting with a message about invalid UTF-8 sequences anymore. Fix for bug 408.

Other changes

• mmg: The "preferences" dialog has been split up into several tabs. Some other preferences available in other dialogs have been merged into the "preferences" dialog.

Version 2.9.5 "Tu es le soul" 2009-06-06

New features and enhancements

• mkvmerge: new feature: Improved the control over which tags get copied from a source file to the output file. The old option "--no-tags" was replaced with the new options "--no-global-tags" which causes global tags not to be copied and "--no-track-tags" which causes track specific tags to not be copied. The new option "--track-tags" can be used to select tracks for which tags will be copied. The default is still to copy all existing tags.
• mkvmerge: new feature: Included chapters, global and track specific tracks in the output of mkvmerge's identification mode.
• mkvmerge: new feature: Added support for the FourCCs ".mp3" and "XVID" in QuickTime files.

Bug fixes

• mkvmerge: bug fix: The handling of TrueHD/MLP audio in MPEG program streams was broken resulting in many dropped packets.
• all: bug fix: There was the possibility that invalid memory access occured and e.g. mkvmerge crashed on systems with the posix_fadvise() function (mainly Linux) if mkvmerge was opening several files from certain file systems (e.g. VFAT). Apart from obvious crashes the only other side effect was that the posix_fadvise() function would not be used resulting in slightly worse I/O performance.
• mkvmerge: bug fix: The sequence header of MPEG-1/2 video tracks is put into the CodecPrivate again while still leaving sequence headers in the bitstream as well. This is more compatible with some existing parsers.
• mmg: bug fix: Removed the check if the user has added tracks and files before starting mkvmerge because mkvmerge itself is able to create track-less files (e.g. chapters only). Fix for bug 402.
• mkvmerge: bug fix: Improved the handling of consecutive AC-3 packets with the same time code (e.g. if AC-3 is read from MP4 files). Fix for bug 403.
• mkvmerge: bug fix: Fixed an endless loop in the TrueHD code occuring when the TrueHD stream is damaged somewhere.
• mkvmerge: bug fix: Fixed the detection of MPEG transport streams with other packet sizes than 188 bytes (e.g. 192 and 204 bytes).
• mkvmerge: bug fix: The detection of invalid padding packet lengths in the MPEG program stream reader was improved to not produce as many false positives. Patch by Todd Schmuland (see AUTHORS). Fix for bug 393.
• mmg: bug fix: Pressing 'return' in the job dialog will close the dialog on Windows, too. Fix for bug 392.
• mmg: bug fix: Fixed the behaviour of how mmg sets the output file name automatically if the option is enabled. If the user adds more than one file then the extension of the output file name is set each time a file is added and not only when the first one is. The full file name and path will only be set when the first file is added. Fix for bug 391.

Other changes

• mkvmerge: Renamed a couple of command line options to make the command line interface more consistent: "--no-audio", "--no-video", "--no-subtitles", "--no-buttons", "--audio-tracks", "--video-tracks", "--subtitle-tracks", "--button-tracks". The old versions of these options "--noaudio", "--novideo", "--nosubs", "--nobuttons", "--atracks", "--vtracks", "--stracks" and "--btracks" still work.

Version 2.9.0 "Moanin'" 2009-05-22

New features and enhancements

• all: Added a translation to Traditional Chinese by Dean Lee (see AUTHORS).
• mkvmerge: new feature: Added a hack ('vobsub_subpic_stop_cmds') that causes mkvmerge to add 'stop display' commands to VobSub subtitle packets that do not have a duration field. Patch by Todd Schmuland (see AUTHORS).
• mmg: enhancement: Changed how mmg sets the output file name automatically if the option is enabled. If the user adds more than one file then the output file name is set each time a file is added and not only when the first one is unless the user has changed the output file name manually. Fix for bug 229.
• mkvmerge: enhancement: Improved support for QuickTime audio tracks with version 2 of the STSD sound descriptor.
• mkvmerge: enhancement: The MPEG program stream reader will now detect invalid padding packets and skip only to the next 2048 byte packet boundary instead of skipping several good packets. Patch by Todd Schmuland (see AUTHORS).
• mmg: enhancement: The "no chapters" checkbox can now be used for QuickTime/MP4 files and OGM files as well.
• mkvmerge: enhancement: The OGM reader will only print the warning that no chapter charset has been set by the user if the title or the chapter information contained in the OGM file is actually used and not overwritten with '--title ...' or '--no-chapters'.
• mkvmerge: new feature: Added support for handling MPEG-1/-2 video in AVI files. Fix for bug 388.
• mkvmerge: enhancement: Implemented small speedups for some common memory operation (affects e.g. the MPEG program stream parser).
• mkvmerge: new feature: Added support for reading chapters from MP4 files. Fix for bug 385.

Bug fixes

• mkvmerge: bug fix: mkvmerge was not handling dropped frames well when converting from VfW-mode MPEG-4 part 2 to native mode MPEG-4 part 2 (with '--engage native_mpeg4'). This resulted in time codes being to low which in turn resulted in the loss of audio/video synchronization. Fix for bug 236.
• mkvextract: bug fix: The modes 'chapters', 'cuesheet' and 'tags' did not honor the '--redirect-output' option and where always writing to the standard output.
• mmg: bug fix: The "remove all" button was sometimes disabled even though there were still files left to be removed.
• mkvextract: bug fix: The VobSub extraction was made more compatible with most applications. Fix for bug 245. Patch by Todd Schmuland (see AUTHORS).
• mkvmerge: bug fix: Fixed support for Windows systems that use code pages that are not supported by the iconv library (e.g. code page 720). mkvmerge was exiting with warnings causing mmg to report that file identification had failed. Fix for bug 376.
• all: bug fix: Global variables are deconstructed in a pre-defined way no longer causing segfaults when the programs are about to exit.
• mkvmerge: bug fix: Fixed potential and actual segmentation faults occuring when appending VC-1 video tracks, Dirac video tracks and DTS audio tracks.
• mmg: bug fix: The header and chapter editors will no longer crash the application if the user wants to open a file that's locked by another process and show an error message instead.
• mkvmerge: enhancement: Invalid VobSub packets whose internal SPU length field differs from its actual length are patched so that the SPU length field matches the actual length. This fixes playback issues with several players and filters. Fix for bug 383.

Version 2.8.0 "The Tree" 2009-05-09

New features and enhancements

• all: Added a translation to Chinese (simplified) by Dean Lee (see AUTHORS).
• mkvmerge: enhancement: Added support for handling AC-3 audio in MP4 files with the FourCC "sac3" (as created by e.g. Nero Recode v3/4). Fix for bug 384.
• mkvmerge, mmg: enhancement: Made mmg's "FPS" input field available for all video tracks. mkvmerge's corresponding option "--default-duration" now not only modifies the track header field but affects the frame time codes as well.
• mmg: enhancement: Added "60000/1001" as a pre-defined option to the "FPS" drop-down box.
• mmg: new feature: Added an option for clearing all inputs after a successful muxing run.

Bug fixes

• mkvmerge: bug fix: The VobSub reader was dropping the very last MPEG packet possibly resulting in the very last subtitle entry being garbled or discarded completely. Patch by Todd Schmuland.
• mmg (header editor): bug fix: The header editor controls on the right stopped responding after the second file had been loaded or the "reload file" feature had been used. Fix for bug 372.
• mkvmerge: bug fix: Made the AAC detection code stricter in what it accepts. This results in fewer mis-detections. Fix for bugs 373 and 374.
• mkvmerge: bug fix: Splitting without the option "--engage no_simpleblocks" resulted in broken files: all frames were marked as B frames. Fix for bug 371.
• mkvinfo: bug fix: Time Codes of SimpleBlock elements that were output formatted in summary mode were too small by a factor of 1000000.
• mkvmerge: bug fix: The duration of subtitle frames was overwritten with the difference between the next frame's time code and the current frame's time code if a time code file was used for that track. Fix for bug 286.
• mmg: bug fix: Removed the option "always use simple blocks" from the preferences dialog as this option was already removed from mkvmerge. Fix for bug 370.

Version 2.7.0 "Do It Again" 2009-04-14

New features and enhancements

• mkvmerge, mmg: new feature: Added support for the "forced track" flag. Fix for bug 128.
• mmg: new feature: Added drag & drop support for the header editor (files can be opened by dropping them on the header editor).
• mkvmerge: new feature: Added support for reading the track language from QuickTime/MP4 files. Thanks to Eduard Bloch for the code for unpacking the language string.
• mkvmerge, mkvextract: new feature: Added support for MLP audio.
• mkvmerge, mkvetract: new feature: Added support for TrueHD audio (read from raw streams with or without embedded AC-3 frames, MPEG program streams).

Bug fixes

• mmg: bug fix: The header editor and chapter editor will not write zero bytes anymore if there's not enough space to write an EbmlVoid element when saving to Matroska files.
• mkvmerge: bug fix: Fixed the aspect ratio extraction for AVC/H.264 video by adding three more pre-defined sample aspect ratios. Mkvmerge also only assumes "free aspect ratio" if the aspect ratio type information indicates it and not if the type information is unknown.
• mmg: bug fix: All arguments are shell escaped and quoted instead of only those with spaces in them. Only applies to the menu options "show command line", "save command line to file" and "copy command line to clipboard". Fix for bug 364.
• mmg: bug fix: When adding a file with colons in the segment title all colons were replaced with the letter 'c'.
• mmg: bug fix: The job manager's status output was garbled if mmg was run with another language as English.
• mmg: bug fix: The progress bar for each individual job in the job dialog wasn't updated if mmg was run with another language as English.
• mmg: bug fix: The time codes in the job queue editor were off by one month. The "added job on" was additionally off by an amount depending on the user's time zone. Fix for bug 362.
• mkvmerge: bug fix: The MPEG program stream (VOB/EVO) reader was sometimes reading the time codes wrong resulting in bad audio/video synchronization. Fix for bug 337.

Build system changes

• Build requirements changed: mkvtoolnix requires Boost v1.32.0 or later.

Other changes

• mkvmerge: mkvmerge will now use SimpleBlock elements instead of normal BlockGroup elements by default.
• mkvmerge: By default mkvmerge keeps the aspect ratio information in AVC/H.264 video bitstreams now (equivalent to specifying "--engage keep_bitstream_ar_info" in earlier versions). A new option "--engage remove_bitstream_ar_info" is available that restores the previous behaviour.

Version 2.6.0 "Kelly watch the Stars" 2009-03-24

New features and enhancements

• mmg: new feature: Added a header editor for Matroska files.
• all: Added a Japanese translation by Hiroki Taniura (see AUTHORS).
• mkvinfo: enhancement: If mkvinfo is started in GUI mode on Windows then the console that was started with it will be closed.

Bug fixes

• mkvextract: bug fix: The "simple" chapter extraction mode (OGM style chapter output) outputs strings converted to the system's current charset by default now instead of always converting to UTF-8. This can be overridden with the "--output-charset" command line option. Fix for bug 359.
• mkvmerge: bug fix: QuickTime audio tracks will be stored with the CodecID "A_QUICKTIME". The CodecPrivate element contains the full "STSD" element from the QuickTime file (just like V_QUICKTIME). This method is used for all audio tracks which don't have a well-defined storage spec for Matroska (e.g. AAC, AC-3, MP2/3 are still stored as A_AC3, A_AAC etc). Hopefully a fix for bugs 354 and 357.
• mkvmerge: bug fix: The CodecPrivate element for QuickTime video tracks like Sorenson Video Codecs contained wrong data. Fix for bug 355.
• mkvmerge: bug fix: Fixed detection of little endian PCM tracks in MOV files. Fix for bug 356.
• mkvextract: bug fix: The charset for text output was not initialized correctly resulting in garbled display of non-ASCII characters in non-UTF-8 locales.
• all: bug fix: A couple of translated strings were converted from the wrong locale when they were displayed.
• all: bug fix: The tools use the API call "GetOEMCP()" on Windows instead of "GetACP()". This should make messages output in cmd.exe come out correctly for Windows versions for which cmd.exe uses a different code page than the rest (e.g. on German Windows).
• mkvinfo: bug fix: Chapter names and tag elements were recoded to the wrong charset resulting in garbled output. Fix for bug 353.

Other changes

• mmg, mkvinfo: The GUIs now require an Unicode-enabled version of wxWidgets.

Version 2.5.3 "Boogie" 2009-03-07

Bug fixes

• mkvmerge, mkvextract, mmg: bug fix: If the environment variables LANG, LC_ALL, LC_MESSAGES contained a locale that was supported by the system but for which mkvtoolnix did not contain a translation (e.g. fr_FR, it_IT, en_AU) then the programs would abort with an error message. Fix for bug 338.
• mkvmerge: bug fix: Appending raw AVC/ES files resulted in segmentation faults. Fix for bug 344.
• mkvmerge: bug fix: When mkvmerge was run with the --attachments option to copy only some of the attachments in a Matroska file then any attachment with an ID larger than the first skipped attachment ID was not copied into the new file. Fix for bug 346.

Version 2.5.2 "Stranger in your Soul" 2009-02-28

New features and enhancements

• mmg: new feature: Added two buttons "enable all" and "disable all" to the list of attached files that enable / disable all attached files.
• mkvinfo: new feature: Made mkvinfo's GUI translatable. Added a German translation for the GUI.

Bug fixes

• installer: bug fix: If the installer is run in silent mode (switch "/S") then it will not ask the user whether or not to place a shortcut on the desktop, and that shortcut will not be created. Fix for bug 345.
• mmg: bug fix: The action "File" -> "New" did not clear the internal list of attached files resulting in unexpected behaviour if files with attachments where added afterwards.
• mmg: bug fix: The button "remove all files" did not clear the list of attached files.
• mmg: On Linux wxWidgets 2.8.0 and newer uses the GTK combo boxes which suck. A lot. Therefore mmg uses wxBitmapComboBoxes for wxWidgets >= 2.8.0 on Linux and normal wxComboBoxes in all other cases. wxBitmapComboBoxes are still drawn by wxWidgets itself (just like wxComboBoxes before 2.8.0) and offer much better functionality. Fix for bug 339.
• mkvmerge, mmg: bug fix: The MIME type autodetection for attachments was broken for paths with non-ASCII characters on non-UTF-8 encoded systems (mostly on Windows). Fix for bug 340.
• source: various fixes for compilation with wxWidgets 2.9.
• all programs: bug fix: The locale was not detected properly often resulting in the program aborting with the message that "the locale could not be set properly". Fix for bug 338.

Version 2.5.1 "He Wasn't There" 2009-02-22

Bug fixes

• mmg: bug fix: Fixed the selection of the translation to use if the LC_MESSAGES environment variable has been set on Windows.

Version 2.5.0 "Back To The Start" 2009-02-21

New features and enhancements

• mkvmerge, mkvinfo, mkvextract, mmg: Made all those programs nearly completly translatable. Added a German translation for all four programs (only for the programs, not for the static documentation: man pages, the guide to mmg etc).
• mkvmerge, mmg: new feature: Added options ('-m' / '--attachments' and its counterparts '-M' / '--no-attachments') to mkvmerge for selecting which attachments to copy and which to skip and the corresponding controls to mmg.

Bug fixes

• mmg: bug fix: Fixed a crash during the check if files could be overwritten by the next mux. Possible fix for bugs 335 and 336.
• mkvmerge: bug fix: Fixed the detection of AAC files whose first AAC header does not start on the first byte of the file.
• mmg: bug fix: It was possible to crash mmg by clicking onto the root element in the chapter editor.
• mkvextract: bug fix: During time code extraction mkvextract wrote large time codes in scientific notation.

Version 2.4.2 "Oh My God" 2009-01-17

New features and enhancements

• mkvmerge, mmg: enhancement: Implemented MIME type detection for attachments with libmagic on Windows.
• mkvmerge: enhancement: Decreased the time mkvmerge needs for parsing Quicktime/MP4 header fields.
• mkvmerge: new feature: Added support for reading the pixel aspect ratio from Theora video tracks.

Bug fixes

• mkvmerge: bug fix: If subtitle files are appended to separate video files (e.g. two AVI and two SRT files) then the subtitle time codes of the second and all following subtitle files were based on the last time code in the first subtitle file instead of the last time code in the first video file. Fix for bug 325.
• mkvmerge: bug fix: Due to uninitialized variables mkvmerge would report OGM files as having arbitrary display dimensions. Fix for bug 326.
• mkvmerge: bug fix: If a Matroska file containing attachments was used as an input file and splitting was enabled then the attachments were only written to the first output file. Now they're written to each output file. Partial fix for bug 324.
• mkvmerge: bug fix: The parser for the simple chapter format (CHAPTERxx=...) can now handle more than 100 chapters. Fix for bug 320.
• mmg: bug fix: The commands "Save command line" and "Create option file" did not save mmg's current state but the state it was in when the command "Show command line" was last used or when mmg was started.
• mkvmerge: bug fix: Fixed a crash (segfault) with MPEG-4 part 2 video if "--engage native_mpeg4" is used. Fix for bug 318.
• Windows installer: The installer cleans up leftovers from old installations during an upgrade. It doesn't write registry entries for an exe called "AppMainExe.exe" anymore. It asks whether or not the user wants a shortcut on the desktop. It does not install the document for base64tool anymore because base64tool itself isn't installed anymore either. Fixes for bugs 314, 315, 316 and 317.
• mmg: bug fix: Fixed a compilation problem with non-Unicode enabled wxWidgets. Fix for bug 313.

Version 2.4.1 "Use Me" 2008-12-04

New features and enhancements

• mkvmerge: new feature: Added support for reading SRT and SSA/ASS subtitles from AVI files (fix for bug 64).

Bug fixes

• Build system: bug fix: Configure does not use "uname -m" for the detection of the Boost libraries anymore but configure's "$target" environment variable. This fixes the Boost detection for cross compilation builds. Fix for bug 311. Patch by Dominik Mierzejewski (see AUTHORS).
• mkvmerge: bug fix: PCM audio tracks bigger than approximately 8 GB were cut off after approximately 8 GB.
• mkvmerge: bug fix: mkvmerge recognizes SRT subtitle files with time codes that contain spaces between the colons and the digits and time codes whose numbers are not exactly two or three digits long.
• mmg: bug fix: mmg processes window events much more often during muxing.
• mmg: bug fix: Split time codes with more than three decimals were not allowed even though the docs say that they are. They are now, as mkvmerge supports such time codes.
• mkvmerge: bug fix: Changed the way mkvmerge calculates the time codes when appending files. Should result in better audio/video synchronization.
• mkvmerge: bug fix: mkvmerge's LZO compressor would segfault if mkvmerge was compiled against v2 of the LZO library and the v1 LZO headers were not present.
• mkvmerge: bug fix: SRT subtitle files are also handled correctly if the time code lines do not have spaces around the arrow between the start and end time codes.
• mkvextract: bug fix: Matroska elements with binary data were output as garbage in XML files.

Other changes

• all: Updated the language code list from the offical ISO 639-2 standard.

Version 2.4.0 "Fumbling Towards Ecstasy" 2008-10-11

New features and enhancements

• mkvmerge: enhancement: mkvmerge will use the time codes provided by the MPEG program stream source file for VC-1 video tracks.
• mkvextract: new feature: Added support for handling SimpleBlocks for time code extraction.
• mkvmerge: new feature: Added support for Dirac video tracks.
• mmg: enhancement: Added the extensions "evo", "evob" and "vob" to mmg's "add file" dialog.
• mkvmerge: new feature: Added support for muxing VC-1 video tracks read from MPEG program streams (EVOBs) or raw VC-1 elementary streams (e.g. as produced by EVODemux).
• mkvmerge: new feature: Added support for 7.1 channel E-AC-3 files. Fix for bug 301.
• mkvextract: new feature: Added support for extracting Theora video tracks into Ogg files. Fix for bug 298.

Bug fixes

• mmg: bug fix: The chapter editor's function "save to Matroska file" was corrupting the target file in some cases. Fix for bug 307.
• mkvmerge: bug fix: mkvmerge was only writing one reference block for real B frames. Patch by Daniel Glöckner. Fix for bug 306.
• all: bug fix: The Windows uninstaller was not removing all start menu entries during uninstallation on Windows Vista. The installer now creates the start menu entries for all users instead of the current user only. Fix for bug 305.
• mmg: bug fix: The "language" drop down box contained some entries twice or more. Fix for bug 304.
• mkvmerge: bug fix: Incorrect usage of the iconv library caused some conversions to omit the last character of each converted entry (e.g. for the conversion from Hebrew to UTF-8). Fix for bug 302.
• mkvmerge: bug fix: Reading EVOBs with multiple VC-1 video tracks was broken (all packets where put into a single video track).
• mkvmerge: bug fix: Reading raw (E)AC-3 files bigger than 2 GB was broken.
• mkvmerge: bug fix: Improved the detection of MPEG-1/-2 and AVC/H.264 video tracks in MPEG program streams (VOBs/EVOBs).
• mkvmerge: bug fix: Fixed reading DTS audio tracks from MPEG program streams (VOBs/EVOBs).
• mkvmerge: bug fix: Revision 3831 (the change to the "--delay" and "--sync" options) caused mkvmerge to no longer respect the delay caused by garbage at the beginning of MP3 and AC-3 audio tracks in AVI files. The time codes of such tracks are now delayed appropriately again. Fix for bug 300.
• mkvmerge: bug fix: Unknown stream types in Ogg files (e.g. skeleton tracks) don't cause mkvmerge to abort anymore. They're simply ignored. Fix for bug 299.
• mkvmerge: bug fix: Fixed the frame type (key or non-key frame) detection for Theora tracks.

Other changes

• mkvmerge: all: On Unix/Linux rpath linker flags have been removed again (they were actually removed before the release of v2.3.0).

Version 2.3.0 "Freak U" 2008-09-07

New features and enhancements

• mkvmerge: new feature: Added support for Vorbis in AVI (format tag 0x566f). Fix for bug 271.
• mkvmerge: new feature: Added support for PCM tracks with floating point numbers (CodecID A_PCM/FLOAT/IEEE). Patch by Aurelien Jacobs (see AUTHORS).
• mkvmerge: new feature: Added support for Ogg Kate subtitles. Patch by ogg.k.ogg.k@googlemail.com.
• mkvmerge: enhancement: mmg outputs a more informative error message for known but unsupported input file types (e.g. ASF, FLV, MPEG TS) instead of the cryptic "file identification failed".
• mkvmerge: new feature: Improved support for WAV files bigger than 4 GB which only contain a single DATA chunk and a wrong length field for this DATA chunk (e.g. eac3to creates such files).
• mkvmerge: all: On Unix/Linux rpath linker flags are added for library paths given in LDFLAGS and configure's "--with-extra-libs" options.
• mkvmerge: new feature: Added support for skipping ID3 tags in AAC and AC-3 files. Fix for bug 204.
• mkvmerge: new feature: Added support for DTS-HD (both "master audio" and "high resolution").

Bug fixes

• mkvmerge: bug fix: improved the time code calculation for MP3 tracks read from MP4 files. Another part of the fix for bug 165.
• mkvmerge: bug fix: mkvmerge honors the time code offsets of all streams in a MPEG program stream (e.g. VOB file) fixing audio/video desynchronization. Fix for bug 295.
• mkvmerge: bug fix: DTS-in-WAV handling (14 to 16 bit expansion) was flawed. Fix for bug 288.
• mkvmerge: bug fix: The fix to the time code handling for AVC tracks in MP4 files from 2008-04-16 caused certain other MP4 files to not be read correctly. The video tracks were found, but no frames were read. Fix for bug 294.
• mkvmerge, mmg: The option "--delay" was removed. The option "--sync" now only modifies the time codes of a given track. mkvmerge does not pad audio tracks with silence. "--sync" works with all track types now, but using a stretch factor other than 1 with audio tracks might not work too well during playback. mmg's inputs for "Delay" and "Stretch by" can be used with all track types. Fix for bug 287.
• mkvmerge: bug fix: The VobSub reader would sometimes read too many bytes for a single SPU packet. Part of a fix for bug 245.
• mkvmerge: bug fix: Using BZIP2 compression resulted in broken streams. Patch by Aurelien Jacobs (see AUTHORS).
• mkvmerge: bug fix: Certain Matroska files with dis-continuous streams (e.g. subtitles) caused huge memory consumption. Fix for bug 281.
• mkvmerge: bug fix: mkvmerge will output a proper error message if it is called with ASF/WMV files instead of detecting other kinds of streams (e.g. AVC ES streams). Fix for bug 280.
• mkvmerge: bug fix: Fixed an assertion in the OGM reader occuring for OGM files with embedded chapters. Fix for bug 279.
• mkvmerge: bug fix: Fixed wrong time codes for MP4 files that contain video tracks with B frames and edit lists. Fix for bug 277. Patch by Damiano Galassi (see AUTHORS).
• mkvmerge: bug fix: mkvmerge will not strip leading spaces in SRT subtitles anymore.
• mkvmerge: bug fix: Tuned the file type detection for MPEG ES streams. Fix for bug 265.
• mkvmerge: bug fix: Fixed writing to UNC paths on Windows. Fix for bug 275.

Other changes

• mkvmerge: Switched from the PCRE regular expression library to Boost's RegEx library.

Version 2.2.0 "Turn It On Again" 2008-03-04

New features and enhancements

• mkvmerge: new feature: Added support for handling AC-3 in WAV in ACM mode.
• mkvmerge: new feature: Added support for reading AC-3 from QuickTime/MP4 files. Fix for bug 254.
• mkvmerge: new feature: Added support for handling AC-3 in WAV in IEC 61937 compatible streams (aka SPDIF mode).
• mkvmerge: new feature: Added support for WAV files with multiple data chunks.
• mkvmerge: new feature: Added support for AAC-in-AVI with CodecID 0x706d as created by mencoder. Fix for bug 266.
• mkvmerge: enhancement: SRT files that contain coordinates in the time code line are supported. The coordinates are discarded automatically (as S_TEXT/SRT doesn't support them), and a warning is shown.

Bug fixes

• mkvmerge: bug fix: Fixed a cause for the error message "no data chunk found" by fixing the skipping of 'fmt ' chunks.
• mkvmerge: bug fix: Rewrote the OGM reader code. Another part of a fix for bug 267.
• mkvmerge: bug fix: Rewrote the time code application code. Additionally force the "previous cluster time codes" that libmatroska uses to the current time code. This seems to get rid of libmatroska's assertions about the local time code being to small/big to fit into an int16. It also seems to get rid of some of mkvmerge's errors about the packet queue not being empty, and it fixes a couple of crashes with file splitting.
• mkvmerge: bug fix: OGM files with non-Theora video tracks caused mkvmerge to fail since 2.1.0, or the resulting file was unplayable. Fix for bug 267.
• mkvmerge: bug fix: Accept other Theora header versions than 3.2.0 as long as the major version is 3 and the minor 2. Fix for bug 262.
• mkvmerge: bug fix: MPEG PS reader: Fixed the resyncing mechanism during normal reads. Another fix for bug 259.
• mkvmerge: bug fix: MPEG PS reader: mkvmerge tries to resync to the next MPEG start code in case of error during stream detection. Fix for bug 259.
• mkvmerge: SVQ1 video tracks read from QuickTime files are output as V_MS/VFW/FOURCC tracks and not as V_QUICKTIME tracks. Fix for bug 257.
• avilib: bug fix: Fixed a segmentation fault if reading the first part of an index failed but a second/other index part is present. Fix for bug 256.

Version 2.1.0 "Another Place To Fall" 2007-08-19

New features and enhancements

• mkvmerge: enhancement: Added support for reading MP2 audio tracks from OGM files. Patch by Mihail Zenkov (see AUTHORS).
• mkvextract: enhancement: Added support for extracting Dolby Digital Plus (E-AC-3) tracks.
• mmg: enhancement: Added another option how mmg choses the directory if automatic output filename creation is on. Implements all suggestions as listed in bug 248.
• mmg: enhancement: Moved the complete 'settings' tab to its own dialog accessible via the 'Settings' option in the 'File' menu.
• mmg: new feature: Added a buton 'remove all' which removes all input files and tracks leaving all other options as they are. Fix for bug 248.
• mmg: new feature: Added an option for setting the default output directory if the automatic setting of the output file name is turned on. Fix for bug 248.
• mkvmerge: enhancement: DTS code: Some tools (e.g. Surcode) can create DTS files which are padded with zero bytes after each DTS frame. These zero bytes are now skipped without printing a warning.
• mmg: enhancement: mmg can now be called with any file name as an argument. If it ends with 'mmg' then the file will be loaded as a 'mmg settings file'. Otherwise mmg will 'add' it. Fix for bug 243.
• mkvmerge: enhancement: The OGM reader now uses the AVC/H.264 video packetizer for AVC/H.264 tracks so that the aspect ratio can be extracted from it.
• mkvmerge: new feature: Added better checks if two tracks can be appended to the passthrough packetizer so that tracks that are otherwise not known to mkvmerge can still be appended (e.g. V_VC1). Fix for bug 244.
• mkvextract: new feature: Added support for the 'header removal' encoding scheme.
• mkvmerge: new feature: The NALU size length of an AVC/H.264 track can now be changed even if the source is not an elementary stream (e.g. for MP4 and Matroska files).
• mkvmerge: enhancement: Added support for RealAudio v3 in RealMedia files. Patch by Aurelian Jacobs. Fix for bug 246.
• mkvmerge: enhancement: The SRT reader allows "." as the decimal separator as well as ",".
• mkvmerge: enhancement: Implemented a major speed-up for reading MPEG-1/2 and AVC/H.264 tracks from MPEG program streams.
• mkvmerge: new feature: Added support for handling AVC/H.264 tracks in MPEG program streams.
• mkvmerge: new feature: Added support for E-AC-3 tracks in MPEG program streams.
• mkvmerge: new feature: Added support for E-AC-3/DD+ (Dolby Digital Plus) files and tracks (raw E-AC-3 files or inside Matroska with CodecID A_EAC-3).

Bug fixes

• mkvmerge: bug fix: SPS and PPS NALUs are no longer removed from AVC/H.264 streams. Hopefully a fix for bug 231.
• mkvmerge: enhancement: Fixed SSA/ASS detection for files produced by Aegis Sub which doesn't include a line with '[script info]' in the file.
• mkvmerge: bug fix: The OGM reader uses the OGM's timestamps for video tracks. Before it would just use the current frame number multiplied by the FPS.
• mkvmerge: bug fixes: Fixed a couple of memory leaks.
• mkvmerge: bug fix: The 'default track' flag was set to 'yes' for tracks read from Matroska files even if 'no' was specified on the command line.
• mkvmerge: bug fix: Another bug fix for handling various AC-3 and E-AC-3 files in MPEG program streams.
• mkvmerge: bug fix: Added support for handling SEI NALUs in AVC/H.264 elementary streams so that "key frames" can be detected even if no IDR slices are present.
• mkvmerge: bug fix: Fixed the VobSub reader so that "delay:" lines with negative time codes are accepted. Fix for bug 241.
• mkvmerge: bug fix: Improved the file type detection code for MPEG transport streams.
• mkvmerge: bug fix: Fixed a problem reading normal AC-3 tracks from MPEG program streams.
• mkvmerge: bug fix: Fixed an issue with negative/huge time codes after splitting AVC/H.264 video.
• mkvmerge: bug fix: Fixed a problem with concatenating more than two subtitle files.
• mkvmerge: enhancement: Fixed the MPEG PS reader so that it will just skip blocks whose headers it cannot parse instead of aborting.

Other changes

• mmg: The NALU size length can now be chosen for all AVC tracks, not only for those that are handled by the 'AVC ES packetizer'.
• mmg: Moved the command line to a separate dialog and reduced the main window's height.
• mkvmerge: The MPEG program stream reader will now sort the tracks it finds first by their type (video > audio > subs) and then by their stream ID.
• mkvmerge: Disabled the support for DTS tracks in MPEG program streams because DTS HD is not supported yet.

Version 2.0.2 "You're My Flame" 2007-02-21

New features and enhancements

• mkvmerge: enhancement: Added support for DTS files which use only 14 out of every 16 bits and which are not stored inside a WAV file.
• mkvmerge, mmg: new feature: Extended the option "--default-track" so that it can be forced to "off" allowing the user to create a file for which no track has its "default" flag set. Fix for bug #224.
• mkvmerge, mkvextract, mkvinfo: new feature: Added support for using CodecState for signaling changes to CodecPrivate. It is used for MPEG-1/-2 video if it is turned on with "--engage use_codec_state".

Bug fixes

• mkvmerge: bug fix: Fixed suppoert for DTS-in-WAV files which are encoded with 14 bits per word.
• mkvmerge: bug fix: File type detection for Qt/MP4 files which start with a "wide" atom has been fixed.
• mmg: bug fix: The "NALU size length" drop down box is now also enabled for H.264 tracks read from AVIs and for H.264 tracks stored in "VfW compatibility mode" in Matroska files.
• mkvmerge: bug fix: Fixed the wrong "default duration" if the user used "--default-duration ...23.976fps".
• mkvmerge: bug fix: The AVC/H.264 ES reader was losing frames if the file size was an exact multiple of 1048576 bytes.
• mkvmerge: bug fix: The AVC/H.264 ES packetizer produced invalid CodecPrivate data if the AVCC did not contain the aspect ratio information. Fix for Bugzilla bug #225.
• mkvmerge: bug fix: The Matroska reader passes the correct track number down to the AVC/H.264 ES packetizer in the case of "AVC in Matroska stored in VfW mode".
• mkvmerge: bug fix: Fixed a crash (segmentation fault) in the AVC/H.264 ES handling code.

Other changes

• mkvmerge: Reintroduced the "--engage allow_avc_in_vfw_mode" hack.
• mkvmerge, mmg: Changed the default for the "NALU size length" to "4" and added a warning if "3" is used.

Version 2.0.0 "After The Rain Has Fallen" 2007-01-13

New features and enhancements

• mmg: new feature: Added another tab for each track in which the user can add arbitrary track options.
• mkvextract: enhancement: mkvextract will now also print which container format it uses for each track.
• mkvextract: new feature: Added support for extracting MPEG-1/2 video to MPEG-1/2 program streams.
• mkvmerge: enhancement: mkvmerge now handles the first frames in AVC/H.264 ES streams properly, especially for files for which it did not find a key frame at the beginning in earlier versions.
• mkvmerge: enhancement: Improved the detection of AVC/H.264 ES streams with garbage at the beginning.
• mmg: enhancements to the job management dialog: There's a minimum width for the columns. The "up" and "down" buttons are disabled if all entries are selected. Pressing "Ctrl-A" selects all entries.
• mmg: enhancements: "File -> New" will also focus the "input" tab.
• mmg: enhancements: The job manager can be opened with "Ctrl-J". The last directory from which a file is added is saved even if the file identification failed. The automatically generated output file name uses the extension ".mka" if no video track is found and ".mks" if neither a video nor an audio track is found in the first file.
• mmg: enhancement: Added an input for the new "NALU size length" parameter.
• mkvmerge: enhancement: Added "x264" to the list of recognized FourCCs for AVC/H.264 video in AVI and Matroska files.
• mkvmerge: new feature: Added support for proper muxing of AVC/H.264 tracks in Matroska files that were stored in the MS compatibility mode (CodecID V_MS/VFW/FOURCC instead of V_MPEG4/ISO/AVC).
• mkvmerge: new feature: Added support for proper muxing of AVC/H.264 tracks in AVI files.
• mkvmerge: new feature: Added support for reading AVC/H.264 elementary streams.
• mmg: enhancement: All inputs and controls are cleared and deactivated if the user select "File -> New".
• mmg: enhancement: The user can switch between the "generic" and "format specific options" pages even if no track is selected.

Bug fixes

• mkvmerge: bug fix: Fixed the file type detection for MPEG-1/2 ES files with a single frame inside.
• mkvmerge: bug fix: MPEG-1/2 video: The sequence and GOP headers are not removed from the bitstream anymore. This should fix the blockiness if the sequence headers change mid-stream. Fix for Bugzilla bug #167.
• mkvmerge: bug fix: Fixed the aspect ratio extraction for raw AVC/H.264 ES tracks.
• mkvmerge: bug fix: If a raw AVC/H.264 ES file does not start with a key frame then all the frames before the first key frame are skipped, and mkvmerge does not abort anymore.
• mkvmerge: bug fix: AVC/H.264 ES parser: Fixed wrong NALU size length information in the AVCC.
• mkvmerge: bug fix: AVC/H.264 ES parser: Fixed the decision if a NALU belongs to a previous frame or starts a new one.
• mkvmerge: bug fix: The NALU size length can be overridden for AVC/H.264 elementary streams. It defaults to 2 which might not be enough for larger frames/slices.
• mkvmerge: bug fix: Support for AVC/H.264 elementary streams with short markers (0x00 0x00 0x01 instead of 0x00 0x00 0x00 0x01).
• mkvmerge: bug fix: Fixed invalid memory access in the AVC ES parser.
• mkvmerge: bug fix: mkvmerge would not write frame durations if "--engage use_simpleblock" was used resulting in unplayable and unextractable subtitle tracks.
• mkvmerge: bug fix: Added a workaround for RealAudio tracks for which the key frame flag is never set.
• mmg: bug fix: Fixed a segfault that occured if the user had a track selected and its the file the track was read from is removed.
• mmg: bug fix: Fixed the behaviour of a couple of ComboBoxes on Windows after selecting "File -> New". E.g. if the user selected "700M" in the "split after this size" ComboBox, selected "File -> New" and selected "700M" again, then it would not show up in the command line window until he selected another option and returned to the "700M" afterwards.

Other changes

• mkvmerge: Removed the "--engage allow_avc_in_vfw_mode" hack.

Version 1.8.1 "Little By Little" 2006-11-25

New features and enhancements

• configure: new feature: Allow the user to tell configure which "wx-config" executable to use ("--with-wx-config=...").
• mkvmerge/mmg: new feature: If ATDS AAC tracks are added to mmg and the AAC track's sample rate is <= 24000 Hz then mkvmerge and mmg assume that the AAC is a SBR track and mmg will check the "AAC is SBR" checkbox automatically.
• mmg: new feature: Made the "set the delay input field from the file name" feature disengageable.

Bug fixes

• mmg: bug fix: Some input controls (like "subtitle charset") where disabled for appended tracks even though the user can and sometimes has to change those settings. Fixes Anthill bug 216.
• mmg: bug fix: The "aspect ratio" box was losing its input when the user switched tracks.
• mkvmerge: bug fix: Quicktime/MP4 files with AVC video tracks and missing CTTS atoms caused mkvmerge to crash after the recent changes to the Quicktime/MP4 time code handling.
• mkvmerge: bug fix: Fixed a segfault if the file specified with "--attach-file" does not exist. Bugfix for Anthill bug 213 and Debian bug 393984.
• mmg: bug fix: Fixed a crash on loading XML chapters after having saved XML chapters.

Version 1.8.0 "Wise Up" 2006-11-10

New features and enhancements

• mkvmerge: new feature: Added support for the "stereo mode" flag for video tracks.
• mkvmerge: Added support for API changes in the upcoming FLAC library v1.1.3. Patch by Josh Coalson (see AUTHORS).
• mmg: new feature: Added an option for always using simple blocks.
• mmg: new feature: Pre-set the "delay" input field for audio tracks if the file name contains something like "DELAY XX" where XX is a number.

Bug fixes

• mkvmerge: bug fix: For MP4 files with certain CTTS contents mkvmerge would use negative time codes for a couple of frames. Those frames were dropped and mkvmerge often ended up eating huge amounts of memory and crashing afterwards.
• mkvmerge: bug fix: AAC-in-MP4 with the LC profile was sometimes misdetected as having a SBR extension and an output sampling frequency of 96000 Hz. Fixes Anthill bug 210.
• mkvmerge: bug fix: Fixed the random number generation on Windows. On Windows 9x/ME mkvmerge would simply hang. On newer versions the function was accessing invalid memory and was generally buggy.
• mkvmerge: bug fix: SSA/ASS subtitles with comments before the "[script info]" line were not identified.
• mkvmerge: bug fix: Made the checks for SRT time codes a bit less strict (e.g. allow fewer than three digits after the comma).
• mkvmerge: bug fix: Comments in OGM files were not handled if mkvmerge was called in identification mode. One obvious result was that neither the track language nor the file title was imported into mmg.
• mmg: bug fix: The "stretch" input box was not accepting the same syntax that mkvmerge's "--sync" parameter accepts.
• mkvmerge: bug fix: PCM audio data with 4 bits per Sample caused mkvmerge to allocate all available memory. Patch by Robert Millan (see AUTHORS).
• mmg: bug fix: Mixed up two tool tips on the "settings" tab.
• Build system: bug fix: Moved some @...@ style variables from configure.in to Makefile.in where they belong (very recent autoconf versions were choking on those).
• mkvmerge: bug fix: mkvmerge will no longer create empty files (meaning neither input files nor things like chapters etc have been added).

Other changes

• mkvmerge: Changed the CodecID for AAC audio tracks to "A_AAC" by default. The CodecPrivate contains the same initialization data that are stored in the ESDS in MP4 files for AAC tracks. The old CodecIDs (e.g. "A_AAC/MPEG4/SBR") can be turned on again with "--engage old_aac_codecid".
• mmg: Reworked the "input tab" and split track options into two sub-pages. Also added an input for the "stereo mode" parameter for video tracks.
• mmg: enchancement: After adding files with drag&drop the next "open file" dialog will start in the directory the last file came from.

Version 1.7.0 "What Do You Take Me For" 2006-04-28

New features and enhancements

• mkvmerge: enhancement: Added support for MIME type detection via libmagic (patch by Robert Millan with heavy modifications by myself).
• mmg: enhancement: The 'adjust time codes' function accepts time codes like 'XXXXXunit' with 'unit' being 'ms', 'us', 'ns' or 's'.
• mkvmerge: enhancement: mkvmerge will no longer refuse to concatenate files with differing Codec Private contents and only issue a warning in such cases.
• mkvmerge: new feature: Added support for the "Delay:" feature and for negative time codes in VobSub IDX files.
• mmg: new feature: If mmg is set to automatically fill in the output file name then it will clear the output file name once all input files have been removed.

Bug fixes

• mkvmerge: bug fix: Theora headers were not handled correctly.
• mkvmerge: bug fix: The WavPack reader was broken on 64bit systems (e.g. AMD64).
• mkvmerge: bug fix: The Theora time code handling was broken, and Ogg/Theora files were not identified correctly (they showed up as "unknown" in mmg).
• mkvmerge: bug fix: Quicktime/MP4 reader: Added support for version 1 media headers ('mdhd' atom) with 64bit fields. Fixed the duration of the last packet passed downstream. Fixed overflow issues during re-scaling from the Quicktime/MP4's time scale to nano seconds used by mkvmerge.
• mkvmerge: bug fix: Muxing wasn't working Windows 9x/ME because mkvmerge was trying to use Unicode file access functions when determining which directories to create. Fixes Anthill bug #177.
• mmg: bug fix: Fixed a crash that occured if the user removed an attachment and clicked somewhere in the empty space in the attachment list. Occured only on Windows.
• mmg: bug fix: Re-added Chinese to the list of popular languages (those are listed first in the language drop down boxes).
• mkvmerge: bug fix: The last change to the ISO 639 language handling broke the VobSub reader so that it reported the wrong language codes. This also caused mmg to not display the correct language after adding a VobSub file.

Version 1.6.5 "Watcher of the Skies" 2005-12-07

New features and enhancements

• source: new feature: Added support for linking against liblzo2 (same compression algorithm, just a new library version). Patch by Diego Pettenò (see AUTHORS).
• mkvextract: new feature: attachment extraction mode: Made the output file name optional. If it is missing (e.g. "mkvextract attachments source.mkv 92385: 124981:") then the name of the attachment inside the Matroska file is chosen instead. Patch by Sergey Hakobyan (see AUTHORS).
• mkvmerge: new feature: If an output file name contains directories that don't exist then they're created. Patch by Sergey Hakobyan (see AUTHORS) with modifications by myself.
• mkvmerge, mmg: new feature: The names of attached files can be set with a new option --attachment-name or on mmg's "Attachments" page.
• mkvmerge: new feature: Added support for Ogg/Theora.
• mkvinfo: new feature: The sub elements of the EBML head are now shown.
• mkvinfo: new feature: Added support for the new SimpleBlock.
• mkvextract: new feature: Added support for the new SimpleBlock.

Bug fixes

• source: bug fix: Changed the list of ISO 639 languages so that the terminology versions are converted into the bibliography versions of the 639-2 codes (e.g. use "ger" instead of "deu" for the German language). Converted almost all pieces of mkvmerge and mmg to accept ISO 639-1, 639-2 codes (both bibliography and terminology versions) and the languages' English names. Those will always be converted to the 639-2 code. Fixes Anthill bug #171.
• mkvmerge: bug fix: The country code used in XML chapter files was checked against the list of ISO 639-1 codes and not against the list of ccTLDs. Partial bugfix for Anthill bug #171.
• mkvmerge: bug fix: When appending tracks and using time codes the time codes were only used for the first track in a chain of tracks. This has been changed so that you must specify only one time code file in such cases (e.g. "mkvmerge ... --time codes 0:my_time codes.txt part1.avi +part2.avi"). mmg has already been working like this. Fixes Anthill bug #162.
• mkvmerge: new feature: Added a workaround for files created by Gabest's DirectShow Matroska muxer with slightly broken frame references. Fixes Anthill bug #172.
• mkvmerge: bug fix: Don't abort reading a Matroska if the next element is not a cluster. This is the case for e.g. files produced by Haali's muxer which writes the segment tracks element in intervals. Fixes Anthill bug #169.
• mmg: bug fix: Fixed a problem with the selection of language codes for chapters in the chapter editor.
• mkvmerge: bug fix: If at least or more attachments were present and the user used --attachment-name for each of them (as mmg does) then mkvmerge was wrongly outputting a warning about multiple uses of --attachment-name for a single attachment.
• mkvmerge: new feature: Added limited support for edit lists in MP4/QuickTime files. Fixes Anthill bug #151.
• mkvmerge: bug fix: MP4/QuickTime files which contain another atom before the 'avcC' atom in the video track headers weren't correctly remuxed.
• mkvmerge: bug fix: mkvmerge will now refuse to append AVC/H.264 video tracks whose codec initialization data blocks do not match. Invalidates Anthill bug #163.
• mkvmerge: bug fix: Fixed a crash If the granulepos (the time codes) reset in the middle of an Ogg/OGM file. Fixes Anthill bug #166.
• mkvmerge: bug fix: Fixed a division-by-zero error in the RealMedia demuxer. Fixes Anthill bug #161.
• mkvmerge: bug fix: Fixed a couple of potential (and actual) segmentation faults by accessing invalid memory addresses. Initial patch for the VobSub reader by Issa on Doom9's forum.
• mkvmerge: bug fix: Fixed another bug when appending AVC/H.264 tracks that would mkvmerge cause to die with "bref_packet == NULL". Fixes Anthill bug #160.
• mmg: bug fix: When the user saved the muxing output in a log file that file didn't use Windows line endings (CR LF) on Windows.
• mmg: bug fix: Appending tracks was broken because the track numbers in the command line were incorrect. Fixes Anthill bug #160.
• mkvmerge, mmg: new feature: Added support for the new SimpleBlock instead of BlockGroups (only available via "--engage use_simpleblock" for now). Patch by Steve Lhomme (see AUTHORS) with fixes by myself.

Other changes

• mkvmerge: Changed the CodecID for AAC audio tracks to "A_AAC" by default The CodecPrivate contains the same initialization data that are stored in the ESDS in MP4 files for AAC tracks. The old CodecIDs (e.g. "A_AAC/MPEG4/SBR") can be turned on again with "--engage old_aac_codecid".

Version 1.6.0 "Ist das so" 2005-10-14

New features and enhancements

• mkvmerge: new feature: Implemented the new header removal compression: compression for native MPEG-4 part 2, decompression for all types (don't use it yet, folks!).

Bug fixes

• mkvextract: bug fix: Extra codec data wasn't written to AVI files if it was present (e.g. for the HuffYuv codec). Fixes bug 157.
• mkvmerge: bug fix: mkvmerge was choking on AVIs with a single frame inside. Fixes bug 156.
• mkvmerge: bug fix: Changed how AVC video frames are referenced. This is not ideal yet, but at least references are kept intact when reading AVC from Matroska files. Should fix bug 154.
• mkvmerge: bug fix: Appending AVC video tracks was broken if they contained aspect ratio information that the user overwrote on the command line.
• mmg: bug fix: If a video track was selected that was appended to another track then the aspect ratio drop down box was still active.
• mkvmerge: new feature: MPEG-4 part 2 streams are searched for the pixel width/height values. Those are taken if they differ from those values in the source container. This is a work-around for buggy muxers, e.g. broken video camera firmwares writing bad MP4 files. Fixes bug 149.
• mkvmerge: bug fix: Appending files with RealVideo was broken.
• mkvmerge, mkvextract: bug fix: ASS files sometimes use a column called 'Actor' instead of 'Name', but both should be mapped to the 'name' column in a Matroska file.

Version 1.5.6 "Breathe Me" 2005-09-07

New features and enhancements

• mkvmerge: new feature: mkvmerge will remove the aspect ratio information from a AVC/H.264 video track bitstream and put it into the display dimensions (until now the AR information was kept on the bitstream level). The reason is that in Matroska the container AR is supposed to take precedence over bitstream AR, but some decoder programmers ignore the container AR in favour of bitstream AR.

Bug fixes

• mmg: bug fix: If the user selected an aspect ratio for a video track, then chose "File -> new", added a file, selected another video track and chose the same aspect ratio as before then it wasn't added to the command line. Fixes Anthill bugs 132 and 146.
• mkvmerge: bug fix: Support Qt/MP4 files with 64bit offset tables ('co64' atom instead of 'stco' atom).
• mkvinfo: bug fix: The GUI couldn't open files with non-ASCII chars in the file name.
• mkvmerge: bug fix: Display dimensions were reported for all tracks, even if they weren't present. In that case they allegedly were "0x0" which caused mmg to add "--display-dimensions ...:0x0" for each track read from a Matroska file, even if the tracks were not video tracks.
• mkvextract: bug fix: The extracted time codes were wrong for blocks with laced frames.
• mkvmerge: bug fix: If a Matroska file with a MPEG-4 part 2 video track was muxed into a Matroska file and the source file did not contain the display width/height elements for that track then the aspect ratio was extracted from the video data itself which clashes with the Matroska specs which say that display width/height default to the pixel width/height if they're not present.
• mkvmerge: bug fix: Native MPEG-4 ASP storage was still bugged: time codes were assigned twice, frames referenced themselves.
• mkvmerge: bug fix: Embedded fonts and pictures in a SSA/ASS file are not discarded any longer. They are converted to Matroska attachments instead. Other sections that were discarded are added to the CodecPrivate data as are "Comment:" lines in the "[Events]" section. Those comment lines still lose their association for which "Dialogue:" line they were meant, but that cannot be changed.
• mkvmerge: bug fix: --delay was not working at all.
• mkvmerge: bug fix: Single digit numbers followed by 's' were not recognized as valid numbers with a unit (e.g. in '--delay 0:9s').

Version 1.5.5 "Another White Dash" 2005-08-21

New features and enhancements

• mkvextract: new feature: Added a new extraction mode for outputting time codes in a time code v2 format file. It is called "time code_v2" and takes the same arguments as the "tracks" extraction mode.
• mkvinfo: new feature: Added a command line switch "--output-charset" which sets the charset that strings read from Matroska files are output in (e.g. if you want the output in UTF-8 and not your system's local charset).
• mkvinfo: new feature: Added a command line switch "-o" for redirecting the output to a file (for systems which re-interpret stdout).
• mkvextract: new feature: Added support for extracting H.264 / AVC tracks into proper H.264 ES streams supported by e.g. MP4Box. Patch by Matt Rice (see AUTHORS).

Bug fixes

• mkvtoolnix: bug fix: On Windows the command line output was terminated with CR CR NL instead of just CR NL.
• mkvmerge: bug fix: The Quicktime/MP4 reader wasn't skipping unknown elements correctly.
• mkvmerge: bug fix: The combination of using external time code files and video tracks with B frames was not working as intended. The user had to order the time codes in the time code file just like the frames were ordered (meaning the time codes for a IPBBP sequence with 25 FPS had to be "0", "120", "40, "80"...). This has been fixed. They have to be ascending again and mkvmerge will assign them properly.
• mkvinfo: bug fix: Files with non-ASCII chars weren't opened because conversion to UTF-8 was done before the charset routines were initialized.
• mkvmerge: bug fix: Fixed a crash if a track in a MP4/QuickTime file did not contain a STCO atom (chunk table) but a STSC atom (chunk map table).
• mkvmerge: bug fix: Very large values were not kept correctly for a lot of elements (meaning they were truncated to 16 or 32 bits).
• mkvinfo: bug fix: Very large values were not displayed correctly for a lot of elements (meaning they were truncated to 16 or 32 bits prior to displaying).
• mkvmerge: bug fix: AVC/H.264 references were wrong, and muxing of AVC from Matroska files with proper references resulted in unplayable files.
• mkvmerge: bug fix: Fixed support for USF subtitles stored in UTF-16 and UTF-32. Added support for USF subtitles stored in UTF-8 without a BOM.

Other changes

• mkvtoolnix: Disabled storing AVC/H.264 video tracks in VfW mode.

Version 1.5.0 "It's alright, Baby" 2005-07-01

New features and enhancements

• mmg: new feature: Added an input box for mkvmerge's new "split after these time codes" feature.
• mkvmerge: new feature: Added splitting after specific time codes.
• mkvextract: new feature: Implemented the extraction of USF subtitles.
• mkvmerge: new feature: Implemented the muxing of USF subtitles.
• mkvmerge: new feature: Added support for the ChapterSegmentUID element.

Bug fixes

• mkvmerge: bug fix: The track language read from old Matroska files was wrongfully set to "und" if it was not written although the specs say that "eng" is the default value.
• mkvmerge: bug fix: USF subtitles: If identical tags were nested (e.g. "font") and both were closed right after each other then the result looked like "</font/>".
• mkvmerge: bug fix: Native MPEG-4 was not working if read from OGM files.
• mkvmerge: bug fixes: Improved the native MPEG-4 generation a lot (thanks to Haali for testing and pushing me). The codec version string inside the MPEG-4 initialization data is now checked if it indicates "DivX packed bitstream" and changed to not indicate it anymore.
• mmg: bug fix: If mmg was minimized when it was closed (e.g. with Windows' "Show desktop" function) then it didn't show up after a restart and could only be shown by maximizing it.
• mkvmerge: bug fix: If a OGM style chapter file contains empty chapter names ('CHAPTER01NAME=' without something after the '=') then this chapter's time code is used as the name instead of aborting.
• mkvmerge, mkvinfo, mkvextract: bug fix: Inifite sized segments were not handled correctly.
• mmg: bug fix: On Windows mmg could be crashed by adding a file and clicking into the empty space in the "track" selection box. Fixes Anthill bug 133.
• mkvextract: bug fix: The MPEG packets are now padded to 2048 byte boundaries as some programs require them to be. Patch by Mike Matsnev (see AUTHORS).
• mkvinfo: bug fix: Removed the restriction of max. ten levels of nested elements.
• mmg: bug fix: If splitting was enabled and "splitting by time" selected and the user chose "new" from the "File" menu then "splitting by time" was not selectable anymore. This happened only on Windows. Fixes Anthill bug 131.
• mkvextract: bug fix: Use the native newline style when extracting text subtitles (\r\n on Windows and \n on all other systems).
• mkvextract: bug fix: SSA/ASS text was missing in the output if the "Format=" line contained newlines at the end of the CodecPrivate data (e.g. our old Mew Mew sample file).
• mkvmerge: bug fix: Support WAV files that use other RIFF chunks than the usual "fmt " followed by "data".
• mkvmerge: bug fix: Remuxing MPEG1/2 tracks resulted in a failing "assert(0)".

Version 1.4.2 "Jimi Thing" 2005-04-16

New features and enhancements

• mkvextract: new feature: Added the extraction of the raw data with the "--raw" and "--fullraw" flags. Patch by Steve Lhomme (see AUTHORS).

Bug fixes

• mkvmerge: bug fix: In rare occasions involving B frames mkvmerge freed data too early. In such a case it was eating more and more memory finally exiting with a message about not finding a packet for a "bref".
• all: bug fix: My output functions did not work on AMD64 systems. Fixes Anthill bug 120.
• mkvextract: bug fix: WAVPACK extraction did not update the "number of samples" header field. Patch by Steve Lhomme (see AUTHORS).
• mkvmerge: bug fix: RealMedia files contain a "FPS" field in their track headers. Unfortunately this field does not always contain the actual FPS of a video track but the maximum number of FPS that the encoder has output or should output. Therefore mkvmerge does not use a "default duration" element for RealVideo tracks anymore. Fixes Anthill bug 113.
• mkvmerge: bug fix: Failing calls to posix_fadvise upon adding a file to mmg caused mmg to think that the file identification failed. Now warnings for posix_fadvise are not output anymore, and posix_fadvise is silently switched off for that file. Fixes Anthill bug 123.
• mkvmerge: bug fix: Appending files that were created with mkvmerge's "--link" option was broken. The time codes for both the chapters and the actual media data blocks were not adjusted correctly. Fixes Anthill bugs 115 and 116.
• mkvmerge: bug fix: If chapters are present in several appended files and there were atoms who shared the same UID then those entries were present multiple times in the output files. Now such entries are merged into one chapter entry. Fixes the second part of Anthill bug 122.
• mkvmerge: bug fix: If chapters were present and splitting was enabled then mkvmerge would not treat chapters correctly that spanned across several files. Now the spanning chapters are kept in all files, and their start time codes are adjusted accordingly. Fixes the first part of Anthill bug 122.
• mkvinfo: bug fix: On Windows mkvinfo was linked without the console subsystem resulting in no output at all if run without the GUI (-g). Fixes Anthill Bug 118.
• mkvmerge: bug fix: Due to the compiler doing some strange number conversion mkvextract seemed to hang on Windows with certain files.
• mkvmerge: bug fix: Appending VobSubs with more than one track in a .idx file and video files at the same time was broken resulting in parts of some of the VobSub tracks not ending up in the resulting Matroska file. Fixes Anthill bug 114.
• mkvmerge: bug fix: The track numbers were assigned wrongly when appending tracks (this is more or less cosmetic).
• mkvmerge: bug fix: Splitting by time was broken for audio-only files. Fixes Anthill bug 112.
• mkvmerge: bug fix: The --fourcc switch was not working.
• mmg: bug fix: Tracks that were not selected on saving the settings file were selected after loading a settings file.

Version 1.4.1 "Cherry Lips" 2005-03-15

Bug fixes

• mkvmerge: bug fix: AC-3 detection was broken in rare cases.
• mmg: bug fix: If the TEMP environment variable contains spaces then the calls to mkvmerge when adding files failed.
• mkvmerge: bug fix: Extracting the FPS from some AVC MP4 files did not work.
• mkvmerge: bug fix: Appending + splitting was segfaulting if used together and at least one split occured after a track has been appended.
• mkvmerge: bug fix: A failing call to posix_fadvise will only turn its usage off for that one file and not abort mkvmerge completely.
• mmg: bug fix: When "appending" a file all tracks where added to the end of the track list making it unnecessarily difficult to concatenate similar structured files. Now the tracks from the "appended" files are inserted into the track list after their counterparts from the file this new one is appended to.
• mmg: bug fix: An "appended" file could not be removed if there were two tracks that we not separated by a track from another file in the track list box.
• mmg: bug fix: The check whether or not a file might be overwritten while splitting is active has been fixed.
• mmg: bug fix: Improved the word wrapping of the tooltips on Windows.
• mmg: bug fix: It was possible to select a file for appending even though no file was added first.
• mkvmerge: bug fix: mkvmerge was wrongly outputting large numbers of warnings when Remuxing AVC/H.264 video from a Matroska file.
• mmg: bug fix: The job queue was not loaded on startup on Windows Unicode builds (another wxWidgets 2.5.3 problem).
• mmg: bug fix: The job status in the job runner dialog was broken on Unicode builds on all systems.
• mmg: bug fix: "Splitting by time" was not selectable on Windows Unicode builds (problem with wxWidgets 2.5.3).
• mmg: bug fix: mkvmerge's output during muxing was not converted from UTF-8.
• mmg: bug fix: The default extension added when the user doesn't give one is different in wxWidgets 2.4.x and 2.5.x. It should always be .mkv and not .mka.

Other changes

• mkvmerge: Added more descriptive error messages if two tracks cannot be concatenated because "their parameters do not match".

Version 1.4.0 "Cornflake Girl" 2005-02-26

New features and enhancements

• mmg: new feature: The "default track" checkboxes are set properly when a Matroska file is added.
• mmg: new feature: Added a warning right before the muxing starts if the chapter editor contains entries but no chapter file has been selected (can be turned off).
• mkvextract: new feature: Added VobSub extraction based on Mike Matsnev's code.

Bug fixes

• mkvmerge: bug fix: Track names could not be set to be empty.

Version 1.0.2 "Elephant's Foot" 2005-02-06

Important notes

• mkvmerge: bug fix: mkvmerge did not accept XML chapter files created with older mkvtoolnix versions due to deprecated chapter elements. Such elements are now skipped.

New features and enhancements

• mkvmerge: new feature: Use the posix_fadvise function on *nix systems. This results in a considerable speed up for the whole muxing process. As the function call seems to be buggy on at least Linux kernels 2.4.x it can be disabled completely during configure. It will only be used on Linux with a kernel from the 2.6.x series or newer.
• mkvmerge: new feature: Added some more possible formats for binary data in XML files besides Base64 encoded data: hex encoded and ASCII "encoded".
• mkvmerge: new feature: Hex values accept more formats (like optional white space between numbers or the "0x" prefix).
• mmg: new feature: Made the mkvmerge GUI guide available by pressing F1 or selecting "Help" from the "Help" menu.
• mmg: new feature: Added support for mkvmerge's new "appending tracks" feature.
• mkvmerge: new feature: Added support for reading the pixel aspect ratio from AVC/h264 video data.
• mkvmerge: new feature: Added AVC/h264 muxing from MP4.
• mkvmerge: new feature: Added a MPEG PS demuxer.
• mkvinfo: new feature: Added a couple new elements (silent tracks). Patch by Steve Lhomme (see AUTHORS).
• mkvextract: new feature: Added WAVPACK4 extraction. Patch by Steve Lhomme (see AUTHORS).
• mkvmerge: new feature: Added WAVPACK4 muxing. Patch by Steve Lhomme (see AUTHORS).
• mkvmerge: new feature: Added VobButton muxing. Patch by Steve Lhomme (see AUTHORS).

Bug fixes

• mkvmerge: bug fix: Empty video frames in AVIs right at the beginning were breaking the MPEG-4 aspect ratio extraction and caused problems in other parts, too.
• mmg: bug fix: It was possible to create chapter entries with invalid or even empty language entries. Not only are those invalid, such XML files can also not be loaded by mmg.
• mmg: bug fix: Overwriting a chapter file did not erase the previous file. So if the previous file was bigger than the current chapters then garbage remained at the end of the file.
• mmg: bug fix: The "stretch" input box tooltip was wrong. The resulting command line was broken, too.
• mkvextract: bug fix: ASS/SSA extraction was broken in some rare cases.
• mmg: bug fix: Again the window handling. Hopefully this is better than the other attempts.
• mmg: bug fix: One was able to crash mmg by pressing 'ok' in the muxing dialog right after muxing finished, especially if the 'abort' button was hit before. This mostly happened on Linux.
• mkvmerge: bug fix: Fixed negative audio displacement for a couple of formats.

Other changes

• mkvmerge: Changed the AVC/H.264 time code handling to include the time code offsets from the CTTS atom.
• mmg: Reformatted the HTML guide and updated the screenshots. It should be more readable for those whose desktop is not 1200 pixels wide.

Version 1.0.1 "October Road" 2004-12-13

New features and enhancements

• mmg: new feature: The window position is saved and restored when mmg is started the next time.
• mkvmerge: Implemented concatenating files with chapters.

Bug fixes

• mmg: Fixed some layout issues with wxWidgets 2.5.3 and newer.
• mmg: bug fix: Fixed a crash/memory corruption showing weird characters in the input boxes. This happened when the user removed a file from mmg while mmg was updating the command line.
• mmg: bug fix: mmg now has an icon associated with it while it is running instead of the generic Windows application icon (Windows only).
• mmg: bug fix: The main window is now minimized during muxing. This allows to hide both of the windows while muxing is running and restoring them later, even if they were iconized when muxing finished (Windows only).
• mkvmerge: bug fix: The first packet of an AAC track read from Real containers might not start at the time code 0. This offset was ignored by mkvmerge.
• mmg: bug fix: Made the muxing dialog ("mkvmerge is running") modal all the time. This prevents the user from hitting the main window's minimize button. On Windows this makes mmg stuck in iconized mode if it was iconized when muxing finished.
• mkvmerge: bug fix: Fixed a buffer overflow in the UTF-8 file reading routines.

Other changes

• mkvmerge: Changed the "progress" output. It's now correct for file concatenation, too.

Version 1.0 "Soul Food To Go" 2004-11-17

New features and enhancements

• mkvmerge: new feature: Concatenating/appending files is now possible. A lot of things aren't tested, and others simply don't work yet (chapter merging, duplicate tag elimination, proper progress report, support in mmg just to name a few), but the basic functionality seems to work.
• mkvmerge: new feature: Added reading DTS from AVIs and from Matroska files.
• mmg: enhancement: Made mmg's main window properly resizable.

Bug fixes

• mkvmerge: bug fix: The Matroska reader doesn't insist on having a default duration ( = FPS) for video tracks in the "AVI compatibility mode" ( = with the CodecID "V_MS/VFW/FOURCC"). This enables re-muxing of Matroska files created from MP4 files.
• mmg: bug fix: File names with non-ASCII characters were not working if mmg was compiled against a Unicode enabled wxWidgets.
• mkvmerge: bug fix: A variable initialization was missing which very recent gcc versions (3.4.2) did not like very much. Also fixed a small compilation bug.
• mkvmerge: bug fix: The handling of external time code files was still not correct but should be OK now.
• mkvmerge: bug fix: If LFE is on for DTS then the number of channels is one more than what the DTS frame header says.
• mkvmerge: bug fix: Time Codes for Vorbis were wrong on rare occasions (when reading laced Vorbis from a Matroska file and changing the lacing, e.g. when splitting for the second and all following files).
• mkvmerge/mkvinfo/mkvextract: bug fix: The chapter and tag element tables were not always intialized correctly depending on the compiler and the optimization flags used.
• mkvmerge: bug fix: The OGM reader was broken if at least one track was not to be copied from the file (happened between 0.9.5 and 0.9.6).
• mmg: bug fix: After loading saved mmg settings the track input box listed the tracks always coming from the last input file and not from the one they really came from.
• mkvmerge: Rewrote the code for the external time code files. This also fixes bug 99: The durations for the individual tracks were not correct for those tracks for which --time codes was used.
• mmg: bug fix: Crash when saving chapters from the chapter editor. Same as the mkvinfo issue below but on all OS.
• mkvinfo: bug fix: The chapter and tag element tables were not initialized on Windows resulting in a crash when one of those elements was encountered.

Other changes

• mmg: Added an error message if the user selects 'mmg' as the 'mkvmerge executable' because that would lead to an infinite number of 'mmg's being spawned.

Version 0.9.6 "Every Little Kiss" 2004-10-07

Important notes

• mkvmerge, mkvextract, mkvinfo: feature removed: Dropped support for the very old and deprecated tagging system. No one used it anyway.

New features and enhancements

• mkvmerge: enhancement: Converted the raw FLAC reader to use another interface to the FLAC libraries. This results in a speedup of up to 50%. Thanks to Josh Coalson for telling me about its existence.
• mkvmerge: new feature: Added two warnings. One about invalid track IDs that were used on the command line but that don't correspond to an available track in a file and one if no track will be copied from a source file. Both warnings hint at bad command line arguments.
• mkvmerge: new feature: The CUE sheet parser now accepts INDEX lines with indices from 00 up to 99 and implements the Red Book specification for audio CDs that way. Patch by Vegard Pettersen <vegard_p at broadpark adot no>.
• mkvmerge: new feature: Added a new parameter --aspect-ratio-factor.
• mkvmerge: new feature: Added support for MP2 (and maybe MP3) audio in MP4 containers.
• mkvmerge: new feature: The chapter and tag parsers accept XML element attributes instead of sub-elements for those sub-elements that only contain data. Example for a "simple tag": <Simple Name="ARTIST" String="Tori Amos"/>
• mkvmerge, mkvinfo: new feature: Added the four new PixelCrop elements.
• mkvmerge, mkvextract, mkvinfo: new feature: Added 'TargetTypeValue' as a supported tagging element.
• mkvmerge: new feature: Allow the use of two-letter ISO 639-1 country codes in for the '--language' parameter. Those will be converted to the corresponding ISO 639-2 language code automatically.
• mkvmerge, mkvinfo, mkvextract: new feature: Added support for the 'TargetType' tag element (which I meant to add before the 0.9.5 release...).

Bug fixes

• mkvextract: bug fix: The track extraction was creating the output file twice if the Matroska file contained a copy of the track headers. This resulted in the first extracted file being overwritten at the end of extraction.
• mmg: bug fix: If the file title is read from an input file, not modified by the user and that input file is removed again then the file title will be unset.
• mkvmerge, mkvextract: bug fix: ASS was handled like SSA which is not correct in each case, especially when extracting it.
• mkvextract: bug fix: The WAV writer was not endian safe.
• mkvmerge: bug fix: The charset was not set correctly on Solaris.
• mkvmerge: bug fix: mkvmerge crashed when reading Matroska files that contain an empty tag list.
• mkvmerge: bug fix: Some Matroska files that e.g. have had their time codes offset with the Matroska Stream Editor or other means may contain time codes that caused mkvmerge to print a warning about "time code < last_time code". A new fix implements a workaround and a warning message with a proper explanation for this case.
• mkvmerge: bug fix: Older Matroska files containing chapters caused mkvmerge to abort muxing.
• mkvmerge: bug fix: mkvmerge was only copying the last tag of a list of tags applying to a track from a Matroska file.
• mkvmerge: bug fix: mkvmerge will show a nice warning if the entries in a SRT have non-continuous timestamps. It'll also sort the entries by their start timestamp instead of throwing the generic "time code < previous time code" warning.
• mmg: bug fix: The 'Matroska file analysis' window that occurs when reading chapters from a Matroska file did not disappear if it was minimized when the process finished.
• mkvinfo: bug fix: Strings from chapters and tags were shown in UTF-8 instead of the local charset. This bug was introduced around 2004-08-28.
• mkvmerge: bug fix: Not all chapter elements were copied correctly from a source Matroska file.
• mkvmerge: bug fix: The Matroska reader was not handling very big cluster time codes correctly. Those can occur when the time code scale factor is very small.
• mkvmerge: bug fix: Empty clusters in Matroska files no longer make mkvmerge think that file has been read completely.
• mkvmerge: bug fix: The automatic MIME type detection based on the file name extension was using the file name extension as the MIME type.
• mkvmerge: bug fix: The MP3 handling was broken on weird and rare occasions when reading MP3 from a Matroska file.
• mkvmerge: bug fix: Removed a bogus warning about an attachment's MIME type having been given more than once.

Other changes

• mkvmerge: Only write the segment duration as a 64bit float if there is no video track present. This way users won't have to update their DirectShow filter/apps for most files. Only audio-only files need this precision anyway.
• mkvmerge: Changed the Ogg/OGM reader to use the stream number and not its serial number as the track ID (meaning the track IDs will be 0, 1, 2... etc. instead of the random numbers oggenc uses as the serial numbers).
• mkvextract: Sped up the extraction of attachments, chapters, cuesheets and tags by using the seek head information and not parsing the full file each time.
• mkvmerge, mkvextract, mkvinfo: Complete rewrite of the chapter and tag parsing and output functions. Additions will be much easier now.

Version 0.9.5 "The Na Na Song" 2004-08-21

New features and enhancements

• mkvmerge, mkvinfo, mkvextract: new feature: Added support for the new 'EditionFlagHidden', 'EditionFlagDefault' and 'EditionManaged' elements.
• mkvmerge, mkvinfo, mkvextract: Added support for the new tag elements ('tag language' and 'default/original language').
• mkvmerge: new feature: If there was no MIME type given for an attachment then mkvmerge will try to guess it based on the file's extension just like mmg.
• mkvmerge/mkvextract: new feature: Use the new EditionUID entries when convert CUE sheets to chapters and tracks. This is in preparation for 'multiple CDs to single Matroska file' conversions.
• mkvmerge: new feature: Abort muxing if the output file name is the same as the name of one of the input files.
• mkvmerge: new feature: Implemented sample-precision for timestamps and durations on audio only files.
• mkvextract: new feature: Limited support for extracting chapters as CUE sheets that haven't been created by using a CUE sheet with mkvmerge's "--chapters" option.

Bug fixes

• mkvmerge: bug fix: WAV files which contained a 'PAD ' chunk before the 'data' chunk were not processed at all.
• mkvmerge: bug fix: Use 'setjmp' and 'longjmp' Instead of throwing a C++ exception during the chapter parsing stage. Otherwise libexpat will abort with a non-descriptive error message on Windows.
• mkvmerge: bug fix: SSA/ASS subs with the old codec ID 'S_SSA' and 'S_ASS' were accepted, but their codec ID was kept. It is now correctly changed to 'S_TEXT/SSA' and 'S_TEXT/ASS'.
• mkvmerge: Added 'EditionUID' to valid elements below '<Targets>' in XML tags. Fixed the creation of the 'Targets' with --global-tags and --tags.
• mmg: bug fix: The 'down' button on the 'input' tab was not working correctly in all cases.
• mkvinfo, mmg: bug fix: Fixed compilation with Unicode enabled versions of wxWidgets.
• mkvmerge: bug fix: Try to guess whether tags read from OGM files (for automatic language tag setting and for copying chapter information) are already in UTF-8 or not. If not try to convert them from the current system's charset.
• mkvmerge: bug fix: use the same UID for the EditionUID in the chapters and in the tag targets when parsing a CUE sheet.
• mkvextract: bug fix: The CUE extraction wrote UTF-8 characters but no UTF-8 BOM (byte order marker) at the beginning.
• mkvmerge: bug fix: Handle TTA files with ID3 tags correctly ( = skip the ID3 tags).
• mkvmerge: bug fix: There was an illegal free() in the OGM reader.
• mkvextract: bug fix: The subtitle track extraction used the wrong duration in 0.9.4.
• mkvmerge: bug fix: Block durations with 0s length (e.g. entries in a SSA file) were not written.
• mkvmerge: bug fix: The FLAC packetizer gets the duration from the FLAC packet itself.
• mkvmerge: bug fix: The word 'TAG' occuring in e.g. SRT subs caused the ID3/MP3 frame detection to be stuck n an endless loop.

Other changes

• mkvmerge, mkvextract, mmg: Changes to the chapter handling. EditionUIDs are always created. mkvextract outputs EditionUIDs and ChapterUIDs normally. mkvmerge tries to keep EditionUIDs and ChapterUIDs but replaces them if they aren't unique.

Version 0.9.4 2004-07-25

New features and enhancements

• mkvextract: new feature: Added support for extracting TTA tracks to TTA files.
• mkvextract: new feature: Implemented the extraction of chapter information and tags as a CUE sheet which is the reverse operation to using a CUE sheet with mkvmerge's '--chapters' parameter.
• mmg: new feature: Added support for the two flags 'hidden' and 'enabled' in the chapter editor.
• mkvmerge: new feature: The pregap from a CUE sheet is converted into two sub-chapters (one for "INDEX 00", one for "INDEX 01"). These sub-chapters have their 'hidden' flag set.

Bug fixes

• mkvmerge: bug fix: SRT file recognition failed if the file contained spaces at the end of the first line.
• mkvmerge: bug fix: Broken VobSub .idx files which contain timestamps going backwards no longer crash mkvmerge. A warning will be printed for such inconsistencies.
• mkvmerge: bug fix: The Matroska reader contained a nice little illegal memory access (introduced in 0.9.3 with the fixes to the 'default track' handling).
• mkvmerge: bug fix: The SSA reader was segfaulting if a line contained an empty text field.
• mkvinfo: bug fix: Fixed compilation for MATROSKA_VERSION = 2.
• mkvinfo: bug fix: Fixed compilation with gcc 3.2.
• mkvmerge: bug fix: The CUE sheet parser interpreted a timestamp as HH:MM:SS (hours, minutes, seconds). The correct spec is HH:MM:FF (hours, minutes, frames with 1 frame = 1/75 second).

Version 0.9.3 2004-07-18

New features and enhancements

• mkvmerge: new feature: When using a CUE sheet as a chapter file mkvmerge will automatically convert some of the entries to tags.
• mkvmerge: new feature: Added support for TTA lossless audio files.

Bug fixes

• mmg: bug fix: The 'default track' checkbox was broken.
• mkvmerge: bug fix: Using '--cues ...:all' was broken for audio tracks that use lacing.
• mkvmerge: bug fix: The latest OpenDML AVI files generated by mencoder were not read correctly. Only the first RIFF chunk was processed.
• mkvmerge: bug fix: The default track feature did not work correctly with the new --track-order.

Other changes

• mkvmerge: If the user does not specify a --language for a track 'und' ('undefined') will now be used instead of 'eng'. The user can use the new option '--default-language' to change that.

Version 0.9.2 2004-06-29

New features and enhancements

• mmg: new feature: Added 'minimize' buttons to the two 'mkvmerge is running' dialogs.
• mmg: new feature: Added an option for automatically calling 'File -> new' after a job has been added to the job queue.
• mkvmerge, mmg: new feature: --track-order now controls the track creation order globally, meaning that it isn't used for each file but only once. This allows the tracks to be created in ANY order (before it was first ordered by file, then by track). For mmg this means that the track list contains all available tracks and that there are no 'up' and 'down' buttons in the file list anymore.
• mmg: new feature: Line wrap the tooltips on Windows.
• mmg: new feature: Suggest a name for a new job based on the output file name.
• mmg: new feature: Temporarily disaable 'always on top' if the muxing or the job dialog are visible.
• mmg: new feature: Ask for confirmation before adding a job if there's already an old job with the same description.
• mkvmerge: new feature: You can specifiy the time after which to split with ms precision.

Bug fixes

• mkvextract: bug fix: Video extraction was not working correctly on big endian systems.
• mmg: bug fix: The job manager did not always catch all of mkvmerge's output, especially if a job failed.
• mmg: bug fix: The functions 'move up', 'move down' and 'delete' in the 'job' dialog were not working correctly on Windows.
• mkvmerge: bug fix: Fixed more of that 'garbage at the beginning of MP3 streams' issue.
• mmg: bug fix: The 'always on top' option was ignored when starting mmg.
• mkvmerge: bug fix: Reading of broken / unfinished AVI files was broken on Windows.

Other changes

• mmg: Updated the mkvmerge GUI guide to reflect changes and additions.

Version 0.9.1 2004-06-13

New features and enhancements

• mmg: new feature: The action 'delete job' in the job manager will also delete the file in the 'jobs' subdirectory.
• mmg: new feature: Added an option to make mmg stay always on top (only on Windows).
• mkvmerge: new feature: mmg will set the 'display dimensions' automatically for AVI files whose video track is MPEG4 and has the pixel aspect ratio stored in the bitstream.
• mmg: new feature: Added a dialog for adding arbitrary command line options which includes a list of advanced options to chose from.
• mkvmerge: new feature: Added support for the audio/video synchronization method used by NanDub (garbage at the beginning of audio tracks inside an AVI) for AC-3 and MPEG audio tracks. In other words: If an AVI is read and an audio track contains garbage right at the beginning then the corresponding audio delay is calculated and used instead of simply discarding the garbage.
• mkvmerge: new feature: Enabled reading MPEG4 video from MP4 files (nope, they're not stored in Matroska's native mode yet).

Bug fixes

• mmg: bug fix: The job manager did not handle the conversion of non-ASCII characters correctly.
• mkvmerge: bug fix: The improved MP3 garbage detection was broken resulting in an error message from mkvmerge in some weird situations.
• mkvmerge: bug fix: Matroska tracks can use lacing (several frames inside one Matroska block with only one time code for the whole block). mkvmerge did not recreate the time codes for the frames 1..n in the lacing correctly.
• mkvmerge: bug fix: The OGM fix in 0.9.0 broke handling for non-broken OGM files a bit.

Other changes

• mkvmerge: Dropped supoprt for 'aviclasses' (one of the two libraries for accessing AVI files). This mostly affects the Windows users as I've used aviclasses and not avilib on Windows so far. The 0.9.0-pre-builds so far haven't shown any problems, though, so I hope this doesn't break anything.
• mkvmerge: feature removed: Dropped support for 'time slices'. They were not used, didn't offer the player any additional value and caused massive increase in overhead.

Version 0.9.0 2004-05-31

Bug fixes

• mkvmerge: bug fix: Improved handling for OGM files. Streams that are lacking the comment packet are handled better.
• mkvmerge: bug fix: Some MP3 streams are padded in the front with trash (mostly those in AVI files). This trash might contain valid MP3 headers which do not match the remaining headers for the actual track. Both the MP3 reader and the MP3 packetizer can now skip up to one of those bogus headers in the trash.
• mmg: bug fix: On some occasions the chapter editor thought there was no language associated with a chapter name and complained about that.
• mkvmerge: bug fix: The OGM reader was not endian safe.
• mmg: bug fix: The chapter editor did not honor the values selected for 'country' and 'language'.
• mkvmerge: bug fix: Audio sync for Vorbis was partially broken for positive offsets.
• mmg: Fix for compilation with wxWindows < 2.4.2.

Other changes

• mmg: Removed the 'advanced' tab. Those options shouldn't be used anyway.
• mkvmerge: Rewrite of the VobSub handling code.

Version 0.8.9 2004-05-06

New features and enhancements

• mmg: new feature: mmg will ask for confirmation before overwriting a file. This can be turned off on the settings tab.
• mmg: new feature: Implement drag'n'drop of files onto the input, attachment and chapter tabs. For the input and attachment tabs it works like pressing the 'add' button. On the chapters tab it works like calling 'Chapter Editor -> Open'.

Bug fixes

• mkvmerge: Fixes for compilation with gcc 3.4.
• mkvmerge: bug fix: Some strings read from RealMedia files were not zero-terminated resulting in broken track recognition for some files.

Other changes

• mkvinfo/mmg: Enabled compilation with wxWidgets 2.5 and Unicode enabled builds of wxWidgets.
• all: Increased the precision for time codes in chapter files to nanoseconds (optionally, you can still use fewer digits after the '.').

Version 0.8.8 2004-04-23

New features and enhancements

• mmg: new feature: When adding Matroska files the video track's display dimensions are displayed as well.
• mkvmerge: new feature: Implemented reading AAC from AVIs.

Bug fixes

• mkvinfo: bug fix: mkvinfo was forcing libmatroska not to handle unknown elements and crashed on those.
• mkvmerge: bug fix: The Flac packetizer was accessing uninitialized memory resulting in a crash on Windows.
• avilib: bug fix: Fixed compilation on big endian systems.
• mkvmerge: bug fix: Fixed the handling of RealMedia files with 'multirate' tracks (again).
• mkvmerge: bug fix: On some rare occasions chapters were not written correctly when splitting was active.
• mmg: bug fix: On non-Windows systems some combinations of wxWindows and GTK caused continuous 100% CPU usage after a special call to wxExecute.

Other changes

• mkvtoolnix now depends on libebml 0.7.0 and libmatroska 0.7.0.

Version 0.8.7 2004-04-05

New features and enhancements

• mkvinfo: new feature: Added a terse output format via '-s'.
• mkvmerge: new feature: If using MPEG4 video and no aspect ratio or display dimensions are given mkvmerge will extract the aspect ratio information from the stream and automatically set the display dimensions accordingly.
• mkvextract: new feature: Added extraction of RealAudio and RealVideo tracks to RealMedia files.
• mmg: new feature: Added a 'job queue'. The current settings can be added as a new job, and all pending jobs can be started for batch processing without user interaction.

Bug fixes

• mkvmerge: bug fix: Using audio sync on AC-3 tracks read from Matroska files did not work.

Version 0.8.6 2004-03-13

New features and enhancements

• mkvmerge: new feature: Tags are being kept when reading Matroska files.
• mmg: new feature: Automatically set the output file name when the first file is added to the same name but with a '.mkv' extension if it hasn't been set yet. Can be disabled on the 'settings' page.
• mkvmerge/mmg: new feature: Made the process priority selectable on the 'settings' page and default to 'normal' again (was 'lower' before).
• mmg: new feature: mmg will ask for confirmation before overwriting an existing output file.

Bug fixes

• mkvmerge: bug fix: OGMs created by Cyrius OGMuxer are missing comment packets for some streams which mkvmerge choked on.
• mkvmerge/mmg: bug fix: The LANGUAGE and TITLE comments from OGM files were not set in the GUI when adding such files.
• mmg: bug fix: If the FourCC was set for one track it had been used for each track you selected as well.
• mkvmerge: bug fix: Large values for --sync (over 2100) would cause an integer overflow resulting in no sync being done at all.
• mkvmerge: bug fix: The VobSub handling was broken if the .idx file contains an entry for a track ("id: en") but no "timestamp:" entries for such a track.
• mkvmerge: bug fix: The segment UID was not generated if splitting was off.
• mkvmerge: bug fix: More of the non-ASCII character fixes (in --tags and --chapters this time).
• mkvmerge: bug fix: No memory was allocated for the --attachment-description resulting in weird descriptions or mkvmerge aborting with 'invalid UTF-8 characters'.
• mkvmerge: bug fix: More of the non-ASCII characters fixes.
• mkvmerge: bug fix: File names with non-ASCII characters like Umlaute are handled correctly.
• mkvmerge: bug fix: Some RealMedia files contain several tracks for multirate stuff which are now ignored. Only tracks with known MIME types (audio/x-pn-realaudio and video/x-pn-realvideo) are used.

Other changes

• mmg: Added a list of 'popular' languages on top of all language drop down boxes.

Version 0.8.5 2004-02-22

Bug fixes

• mkvmerge: bug fix: segfault in the RealMedia reader.
• mmg: bug fix: When adding a Matroska file that contains a track name or a title with non-ASCII characters those would be displayed as UTF-8 in the appropriate input boxes. This has been changed, but obviously it won't work if you add files with Japanese characters on a system with a different locale. For full Unicode support you'll have to wait quite a bit longer.
• mmg: bug fix: For some 'browse file' buttons the default directory was not set to the last directory a file was selected from.
• mmg: new feature: Added a function for adjusting the chapter time codes by a fixed amount.
• mkvmerge: bug fix: Splitting by size would sometimes abort directly after opening the second file.
• mkvmerge: bug fix: Splitting by time was broken.

Other changes

• all: A couple of changes that allow compilation on MacOS X.
• avilib: synchronized with transcode's current CVS version.

Version 0.8.4 2004-02-11

Bug fixes

• mkvmerge: bug fix: When reading Matroska files the durations attached to blocks were lost (e.g. for subtitle tracks).

Version 0.8.3 2004-02-09

New features and enhancements

• mkvmerge: new feature: The LANGUAGE, TITLE tags and chapters are being kept when reading OGM files.
• mkvmerge: new feature: Enabled reading of AAC from OGMs.

Bug fixes

• mkvmerge: bug fix: VobSub durations were not converted from ms to ns precision resulting in VERY short packets :)
• mkvmerge: bug fix: The change from ms to ns precision broke subtitle handling from OGM.
• mkvmerge: bug fix: Segfault when using external time code v1 files.
• mkvmerge: bug fix: The AAC-in-Real stuff again.
• mkvmerge: bug fix: Fixed a couple of memory leaks, especially in the QuickTime/MP4 parser.
• mkvmerge: bug fix: Proper handling for AAC read from RealMedia files (sample rate/output sample rate were not assigned correctly).

Other changes

• mkvmerge: Changed the meaning of '--global-tags'. They now apply to the complete file.
• mkvmerge: Made "do not link files when splitting" the default, just like in mmg.
• mkvmerge: The VobSub reader will not discard packets that exceed a certain size (64KB) anymore.
• mkvmerge: Improved some internal memory freeing decisions. This should help with files/sections in which are only few keyframes.
• mkvmerge: Changed the two-pass splitting into a one-pass splitting. The resulting files will always be a little bit larger than the desired size/length, but this shouldn't matter.
• mmg: Rewrote the chapter editor. It now makes a lot more sense: You can have multiple names for one chapter entry, and for each name there's only one language/country association.
• mkvmerge: Changed the complete time code handling from ms precision to ns precision. Expect some things to be broken by this change.
• mmg: Added some more extensions for RealMedia files.

Version 0.8.2 2004-01-21

New features and enhancements

• mkvmerge: new feature: The track headers will be rendered completely including the elements that are set to their default values. Causes less confusion and allows the setting of e.g. the track language without having to remux the file completely.
• mmg: new feature: Automatically pre-set the attachment's MIME type if the file has a known extension (e.g. 'text/plain' for '.txt').
• mkvmerge: new feature: Unknown/unsupported track types can be copied 1:1 from Matroska input files.
• mkvmerge: new feature: Added proper support for AAC-inside-RealMedia files.
• mkvmerge: new feature: Write cues for audio-only files as well (not more than one cue entry during a two seconds period).
• mkvmerge: new feature: Added the two new chapter flags 'hidden' and 'enabled'.
• mkvmerge: new feature: Added a new format for the external time code files.

Bug fixes

• mkvmerge: bug fix: The PCM handling was broken resulting in packets that did not end on sample boundaries.
• mkvmerge: bug fix: AVIs with uncompressed sound were leading to buffer overflows.
• mkvmerge: bug fix: If remuxing a file that contains frames with a reference to the same time code those references were lost turning such P frames into I frames. This was the case for some RealAudio stuff.
• mkvmerge: bug fix: The default track flags could not be overriden on the command line when reading Matroska files.
• mkvmerge: bug fix: The VobSub handling was on occasion putting SPU packets for the wrong MPEG stream into the current stream resulting in that particular entity not being displayed.

Other changes

• mkvmerge/mmg: allow the track names to be empty so that you can remove them when muxing Matroska files. Same for the file title.
• Windows binaries after v0.8.1 require a new runtime DLL archive. Please download it from https://mkvtoolnix.download/ Thanks.

Version 0.8.1 2004-01-06

Bug fixes

• mkvmerge: bug fix: The I/O classes were not initialized correctly on Windows resulting in spontaneous strange error messages, especially when muxing VobSubs.
• mkvmerge: bug fix: For some special atom sizes in Quicktime and MP4 files the size was not read correctly. This affected e.g. files created by Nero Digital.
• mkvmerge: bug fix: Segfault when muxing some video formats due to unchecked data (includes RealVideo).

Version 0.8.0 2004-01-01

New features and enhancements

• mkvmerge, mkvextract, mkvinfo: Added support for the new tagging system.

Bug fixes

• mmg: bug fix: Fixed the "write chapters to Matroska file" feature.
• mmg: bug fix: Made mmg not abort but only display an error message when malformed XML chapter files should be loaded.
• mkvmerge: bug fix: The timescodes for Vorbis were calculated one packet too early (meaning that the first packet did not start at 0).
• mmg: bug fix: The default values for the chapter language and chapter country are now applied when loading simple (OGM) style chapter files as well.
• mkvmerge: bug fix: The VobSub packetizer will assume MPEG2 if no MPEG version identifier was found ("Unsupported MPEG version: 0x00...").
• mkvextract: bug fix: Wrong display output and illegal memory access when extracting FLAC files.
• mmg: bug fix: If one added a Matroska file and the track name or language of a track consisted of only blanks then mmg would segfault.
• mmg: bug fix: The chapter editor did not properly escape the chapter names resulting in invalid XML files if the special characters &, < or > were used.
• mkvmerge: bug fix: If splitting was active then a wrong CodecID was written to the second and all following files for MP2 tracks.

Other changes

• mmg: Made "don't link" ON by default because some players might have problems with the second and all following files if they don't expect them not to start at 0.
• mkvmerge: There are MP4 files that actually contain HE-AAC but don't have the 5 byte identifier. mkvmerge will also assume SBR if there's only the 2 byte identifier with a sampling frequency < 44100Hz.
• mmg: The input box will automatically select the first track when a file is selected. Upon track selection the input focus is set to the track name input box.
• mmg: The chapter editor automatically focuses the chapter name input box whenever a chapter entry is selected.

Version 0.7.9 2003-12-11

New features and enhancements

• mmg: new feature: Added "up" and "down" buttons for the tracks, too.
• mmg: new feature: Added a menu option, 'set output file', that can be used as an alternative to the "browse" button at the bottom (for those poor users with nothing more than 800x600 ;)).
• mkvmerge: new feature: The user can alter the order in which the tracks for an input file are put into the output file with the new "--track-order" option.
• mmg: new feature: Added buttons for moving input files up and down in the input file box.

Bug fixes

• mmg: bug fix: Removed the Ctrl-v and Ctrl-c accelerators that I used for mmg functions which overrode the usual 'paste' and 'copy' functionality.
• mkvmerge: bug fix: Negative track IDs in Ogg files were reported incorrectly for mkvmerge -i (which affected the GUI).
• mkvmerge: bug fix: Internal changes had messed up the --language and --track-name functionality.
• mmg: bug fix: The "AAC is SBR" check box was grayed out for AAC inside MP4 files.
• mmg: bug fix: The "load settings" function did not load all settings, and some strings were not allocated at all resulting in a crash when a track was removed after loading these settings.
• mkvmerge: bug fix: The AAC packetizer was not working if packets were being read from a raw AAC file (it worked fine from MP4 and Matroska files).
• mkvmerge: bug fix: Avoid deadlocks when parsing broken SPU packets from VobSubs.

Other changes

• mkvmerge: Set the thread priority to BELOW_NORMAL on Windows (mkvmerge was already nice(2)'d on Unix systems).
• mmg: Command line arguments are put into an option file which is then handed over to mkvmerge. This allows really long command lines, even on Windows.

Version 0.7.8 2003-12-02

New features and enhancements

• mmg: new feature: You can set the values for the language and/or country codes for a chapter and all its children with the push of one button (the new "Set values" button).
• mmg: new feature: You can set default values for the language and the country codes in the chapter editor (Chapter menu -> Set default values).
• mkvmerge: new feature: Added an option '--display-dimensions' which allows the direct setting of the display dimensions. It is mutually exclusive with '--aspect-ratio', of course.
• mkvmerge: Added an option for dumpig all split points including file size and timestamp information after the first splitting pass.

Bug fixes

• mkvmerge: bug fix: Display dimensions were sometimes off by one, e.g. 640x479 instead of 640x480. This should not happen anymore for sane pixel dimensions.
• mmg: bug fix: The language combo box was not correctly set on Windows.
• mmg: bug fix: Quotes were missing if the time code file's name contained spaces.
• everything: Committed a lot of cross-OS compatibility fixes (thanks to Haali and thedj).

Other changes

• mkvmerge: Changed the options '--fourcc' and '--aspect-ratio'. They now take a track ID just like all the other track specific options.
• mkvmerge: Rewrote the SPU packet parsing code. It should not abort anymore.

Version 0.7.7 2003-11-16

New features and enhancements

• mkvmerge: Added full support for FLAC (both raw FLAC and OggFLAC are supported, even though raw FLAC is very slow).
• mmg: Added an input field for the 'time codes' file to the track options.
• mkvmerge: new feature: CUE sheets can be used for chapters.
• mkvmerge: Added support for --sync for VobSub tracks.
• mmg: When a file is being added then some information from it (languages, track names, file title) are kept, and the appropriate input boxes are pre-set with these values. Works only for formats that support such information (Matroska, VobSub).

Bug fixes

• mkvmerge: bug fix: Reworked the audio sychronization which did not work correctly for Matroska source files.
• mkvmerge: bug fix: Increased the size of the space reserved for the first meta seek element (see mkvmerge.1 for an explanation). In some situations (with tags, chapters, attachements and very big file) it might not have been enough in order to contain all elements.
• mkvmerge: bug fix: When reading MP3 audio tracks from a Matroska file with the A_MS/ACM CodecID (MS compatibility mode) the layer was not identified correctly.
• mkvmerge: Implemented a lot of fixes for big endian systems and processors that don't allow non-aligned memory access for word or bigger sized objects.
• mkvmerge: bug fix: If running in identification mode (-i, used by mmg a lot) then don't output any warnings or mmg will not accept this file.

Other changes

• mkvextract: Added extraction of FLAC to raw FLAC or OggFLAC files.
• mmg: Added an input field for the 'CUE sheet to chapter name' conversion format.
• mkvmerge: Improved the file type detection for AC-3 and AAC files a bit.
• mmg: Made mmg accept return codes of 1 when 'mkvmerge -i' is run when an input file is added. This way mmg won't reject mkvmerge's output if mkvmerge only printed some warnings which will result in a return code of 1 instead of 0.
• mkvtoolnix: Re-worked the configure script. Removed all the lib specific --with-...-include and --with-...-lib options. The --with-extra-includes and --with-extra-libs options can be used instead.
• mkvmerge: Sped up the reading of VobSub .idx files.

Version 0.7.5 2003-11-05

New features and enhancements

• mkvmerge: new feature: Added the ability to read time codes from text files which override the time codes mkvmerge calculates normally.
• mmg: new feature: Added a new menu entry "File -> new" which will clear all the current muxing settings.
• mmg: Added support for VobSub subtitles including their compression options. Added the .m4a extension to the 'add file' dialog.
• mkvmerge: new feature: Implemented generic support for frame compression (mostly useful for VobSub subtitles but could also be used for others) and the complete framework for handling content encodings in the Matroska reader.
• mkvinfo: new feature: Dump unknown elements recursively.

Bug fixes

• mkvmerge: bug fix: The VobSub .idx parser was dividing by 0 if a track only contained one entry.
• mkvmerge: Fixed the time code reader code and made it a bit more flexible. Added more documentation for this feature along with an example file (examples/example-time codes.txt).
• mmg: bug fix: When 'default track' is selected then all other tracks of the same type will have their 'default track' flag cleared.
• mkvextract: bug fix: Add all the mandatory elements when extracting chapters so that the resulting XML can always be used directly with mkvmerge again without having to manually add e.g. ChapterLanguage.
• mkvmerge: bug fix; Handle audio tracks from Matroska files with the CodecID A_MS/ACM correctly.
• mkvmerge: bug fix: The VobSub .idx parser was mis-calculating the subtitle entry frame sizes.
• mkvmerge: bug fix: The Vorbis packetizer was miscalculating the number of samples to add/remove when using audio sync.
• mmg: bug fix: Made the input boxes for file names (tags and chapters) editable so that their contents can be deleted.
• mkvmerge: bug fix: Made the SRT reader more tolerant regarding empty lines.

Other changes

• mkvmerge: SPU packets belonging to the same time code are grouped together, and the duration is extracted directly from the SPU stream.
• mkvmerge: The VobSubs are now stripped of the MPEG program stream, and only the SPU packets are kept.
• mkvmerge, mkvextract: The Matroska reader and the OGM reader (mkvmerge) as well as mkvextract will discard empty or 'cleaning only' subtitle packets as they are appear in OGMs in order to mark the end of an entry.
• mkvmerge: Changes to use libmatroska's new lacing code.
• mkvmerge: Adjusted the compression handling to the final content encoding specs.

Version 0.7.2 2003-10-14

New features and enhancements

• mkvmerge: Implemented some speedups for a couple of container formats and track types (mainly AVI reader, MP3/AC-3/AAC packetizers). Especially noticeable when splitting is active as well.

Bug fixes

• mkvmerge: bug fix: If 'no linking' and splitting was active mkvmerge would abort on the start of the second output file due to time codes that were calculated incorrectly.
• mkvextract: bug fix: Support for extracting SBR AAC (previous 'fix' did not actually fix this).
• mkvextract: bug fix: All extracted subtitles where written to the first output file given, not to the one they were supposed to be written to.
• mmg: bug fix: The 'abort' button was doing nothing under Windows.
• mmg: bug fix: Audio, video and subtitle track selection was translated into the wrong command line options.

Other changes

• mkvmerge: Replaced the avilib based AVI reading functions with AVI classes from Cyrius.

Version 0.7.1 2003-10-03

New features and enhancements

• mkvmerge: new feature: Attachments are kept when reading Matroska files.
• mmg: new feature: Added a (nearly) full-featured chapter editor.
• mkvmerge: new feature: RealAudio can be read from Matroska files.

Bug fixes

• mkvmerge: bug fix: XML chapters were not parsed correctly.
• mkvmerge: bug fix/new feature: Rewrote the complete MP3 handling. Now files with ID3 tags (both v1 and v2) are handled correctly. All MPEG-1 audio files (all layers) should be handled correctly now.
• mkvextract: new feature: Support for extract HE-AAC tracks to .aac files. Bug fix: Missing elements (default values) are handled correctly for audio tracks.
• mkvmerge: bugfix: If attachments were given with path components then the path component wasn't discarded for the attachment's description on Windows (normally only the file name should be used as the attachment's name).
• mmg: Fixed wrong order of the options --chapters, --chapter-language and --chapter-charset.
• mmg: bugfix: Moved the aspect ratio and FourCC input fields from the global tab to the input tab where they belong to.
• mkvmerge: bugfix: RealVideo was not read correctly from Matroska files.
• mkvmerge: bugfix: The SRT reader would abort if there was more than one empty line between subtitle entries line.
• mkvextract: bugfix: Proper BOMs are written according to the desired charset when extracting text subtitles.

Other changes

• Added a guide for mmg including some pictures.
• mkvmerge: Changed the lacing strategy again. New defaults are NOT to write duration elements for all blocks, NOT to use time slices and to USE lacing for most audio tracks. This will save some space. The downside is that the laced frames 'lose' their precise time code information. Current demuxers don't care and will work nevertheless. More sophisticated applications that make use of these advanced information (duration elements, time slices) are not available at the moment. All these options can be toggled by the user with the new/modified options --disable-lacing, --enable-durations and --enable-timeslices.
• mmg: Added a lot of checks on the data given by the user so that invalid data is reported by mmg and not by mkvmerge.
• mmg: Made the app a GUI app which gets rid of the "DOS box" on Windows.

Version 0.7.0 2003-09-16

New features and enhancements

• mkvmerge: Implemented an experimental VobSub reader and packetizer. No specs exist for these yet, though.
• mkvmerge: Added support for XML based chapter files.

Other changes

• mkvextract: Add an UTF-8 BOM to extracted SSA/ASS and SRT subtitle files. Print warnings for missing durations for text subtitle tracks.
• Added a complete GUI for mkvmerge, mkvmergeGUI (mmg) based on the work of Florian Wagner.
• mkvmerge: Support for setting the track names.
• mkvmerge: For Matroska source files: If the source contains chapters then these are kept unless the user specified chapters with --chapters.
• mkvmerge: Improved the support for Matroska files with tracks with big gaps between entries, e.g. subtitle tracks whose entries are a minute or more apart.
• mkvmerge: When splitting is active and the source is a Matroska file then splitpoints were borked, and the first pass was slow as your average mole.
• mkvmerge: The track UIDs are kept when reading Matroska files even when splitting is active.
• mkvmerge: Added a QuickTime/MP4 reader. Can handle several QuickTime video and QuickTime audio formats as well as AAC (both 'normal' AAC and SBR AAC).
• mkvmerge: DisplayWidth and DisplayHeight are kept intact when reading from a Matroska file but can be overridden with --aspect-ratio.
• Wrote documentation, XML examples and the DTD for the XML chapter files.
• mkvinfo: Rewrote mkvinfo to use libebml's Read() function instead of manually reading each and every element.

Version 0.6.5 2003-08-29

Bug fixes

• mkvmerge: On Windows the 'isspace()' function used to trim leading and trailing white spaces from tags considered some parts of valid UTF-8 character sequences to be white spaces as well. Fixed by replacing 'isspace()' with 'isblank()'. Reported by Liisachan.
• mkvmerge: Real reader: For RV40 the actual dimensions were also used for the aspect ratio/display dimensions. This has been fixed: the actual dimensions are used for PixelWidth/PixelHeight, the dimensions stored in the RM container are used for the aspect ratio/DisplayWidth & DisplayHeight. Reported by Karl Lillevold.

Other changes

• mkvmerge: Support for chosing the charset and language used in simple chapter files. Suggestion by Liisachan.
• Rewrote the UTF-8 conversion routines. They should now handle U+8000 characters correctly. Reported by Liisachan.

Version 0.6.4 2003-08-27

New features and enhancements

• mkvmerge: Meta seek element is split into two elements. The first's located at the start of the file containing only a small number of level 1 elements. The clusters are referenced in a second meta seek element located at the end of the file. Removed the options "--meta-seek-size" and "--no-meta-seek". Added the option to disable that second meta seek entry, "--no-clusters-in-meta-seek".
• mkvinfo: Added support for the following elements: KaxPrevFilename, KaxNextFilename, KaxTrackFlagEnabled, KaxTrackName, KaxCodecName, KaxCodecSettings, KaxCodecInfoURL, KaxCodecDownloadURL, KaxCodecDecodeAll, KaxTrackOverlay, KaxAudioPosition, KaxAudioOutputSamplingFreq, KaxVideoDisplayUnit, KaxVideoColourSpace, KaxVideoGamma, KaxVideoFlagInterlaced, KaxVideoStereoMode, KaxVideoAspectRatio, KaxClusterPosition, KaxClusterPrevSize, KaxBlockVirtual, KaxBlockAdditions, KaxBlockMore, KaxBlockAddID, KaxBlockAdditional, KaxReferenceVirtual, KaxSliceBlockAddID, KaxChapters, KaxEditionEntry, KaxChapterAtom, KaxChapterUID, KaxChapterTimeStart, KaxChapterTimeEnd, KaxChapterTrack, KaxChapterTrackNumber, KaxChapterDisplay, KaxChapterString, KaxChapterLanguage, KaxChapterCountry

Bug fixes

• mkvmerge: Fixed some missing default values in the Matroska reader (e.g. mono audio files). Reported by Liisachan.
• mkvmerge: Bugfix: If a subtitle packet was the last packet in a cluster then its duration was not written resulting in a broken file.

Other changes

• mkvextract: Support for re-creating dropped frames when extracting video to an AVI. Works only well if the frame durations in the source file are multiples of the frame rate, of course.
• mkvmerge: The MP3 packetizer did not start at 0 with its time codes. It does now. Reported by alexnoe.
• mkvmerge: Proper support for dropped frames when reading AVI files. Reported by alley_cat, Horváth István.
• mkvmerge: Improved all command line parsing error messages.
• mkvmerge: Improved the error message for the XML tag file parser if an invalid &-sequence is found.
• mkvextract: Strings are postprocessed so that the special characters &, <, >, " are replaced by their HTML equivalents &, &lt, > and ".
• mkvmerge: Disabled lacing by default and renamed --no-lacing to --enable-lacing. With all the proper info about the laced frames lacing is actually producing larger files than without lacing.
• mkvextract: Backwards compatibility: Accepts S_SSA and S_ASS as valid CodecIDs (new CodecIDs are S_TEXT/SSA and S_TEXT/ASS).

Version 0.6.3 2003-08-20

New features and enhancements

• mkvmerge: Implemented a switch that has to be used for SBR AAC / AAC+ / HE-AAC if the source file is an AAC file and the AAC file contains SBR AAC data (no automatic detection possible in this case!).

Bug fixes

• Windows versions: Fixed a bug with files bigger than 2GB not being recognized. The accompanying error message was "File NAME has unknown type. Please have a look at the supported file types..."
• all tools: Fixed a bug which would only allow Matroska files up to 4GB to be read. The accompanying error message was "No segment found" or something similar.

Other changes

• mkvmerge: The Real reader accepts incomplete video packets and tries to re-assemble them instead of aborting with 'die: len != total'.
• mkvmerge: Low bitrate AC-3 tracks from Real's DNET are identified as A_AC3/BSID9 or A_AC3/BSID10.
• mkvmerge: The RealMedia reader takes the number of packets into account when reading which results in better end-of-file detection.
• mkvinfo: Unknown elements are properly skipped now.
• mkvmerge: For RV40 (RealVideo 9) the actual video dimensions are decoded from the first video frame.

Version 0.6.2 2003-08-11

Other changes

• mkvmerge: Video aspect ratio was set wrong if the user did not specify any.

Version 0.6.1 2003-08-11

New features and enhancements

• mkvinfo: Added Adler-32 calculation and display for frame contents with the -c option.

Bug fixes

• mkvmerge: Fixed support for reading MultiComment tags from XML tag files.
• mkvmerge: Fixed a bug with chapters and splitting which would crash mkvmerge if no chapter belonged into the output file.

Other changes

• mkvmerge: RealVideo: Support for all kinds of frames including "short" and "merged" frames (results are identical to Gabest's output).
• mkvmerge: The aspect ratio setting will only cause upscaling of the current video dimensions which are then put into KaxVideoDisplayWidth and KaxVideoDisplayHeight.
• mkvextract: Changed how the global elements are handled by taking the parent's size into account. This re-enables processing of files produced with the latest VirtualDubMod.
• mkvmerge: Changed how the Matroska reader handles global elements by taking the parent's size into account. This re-enables processing of files produced with the latest VirtualDubMod.
• mkvinfo: Changed how mkvinfo handles global elements by taking the parent's size into account. Hopefully this is now correct.
• mkvextract: Support for MultiComment tags.
• mkvmerge: Allow some slightly broken Matroska files to be processed correctly if the reference blocks are off by at most 1ms.
• mkvmerge: MP3: Better support for other MPEG versions and layers (number of samples per packet).
• mkvmerge: RealAudio: "dnet" is actually byte-swapped AC-3 and is being treated as such (re-swapped and output as AC-3).
• Changes for compilation with gcc 2.95.

Version 0.6.0 2003-08-04

New features and enhancements

• mkvmerge: Added support for simple chapter files (CHAPTER01=..., CHAPTER01NAME=Hello World etc).
• mkvmerge: Added support tags based on XML files.
• mkvextract: Rewrote the command line syntax. Added extracting attachments and tags as new options.
• mkvmerge: Added support for the "SegmentTitle" (general title of the file written).
• mkvmerge: Added support for UTF-8 and UTF-16 encoded text files for the SRT and SSA/ASS readers.
• mkvmerge: Added support for attaching files to the output file(s).
• mkvinfo: Added support for the rest of the tags: KaxTagMultiComment, KaxTagMultiCommentName, KaxTagMultiCommentComments and KaxTagMultiCommentLanguage. Almost all tags have been successfully tested.
• mkvinfo: Added support for allmost all tags (totally untested): KaxTag KaxTagArchivalLocation KaxTagAudioEncryption KaxTagAudioGain KaxTagAudioGenre KaxTagAudioPeak KaxTagAudioSpecific KaxTagBibliography KaxTagBPM KaxTagCaptureDPI KaxTagCaptureLightness KaxTagCapturePaletteSetting KaxTagCaptureSharpness KaxTagChapterUID KaxTagCommercial KaxTagCropped KaxTagDate KaxTagDiscTrack KaxTagEncoder KaxTagEncodeSettings KaxTagEntity KaxTagEqualisation KaxTagFile KaxTagGeneral KaxTagGenres KaxTagIdentifier KaxTagImageSpecific KaxTagInitialKey KaxTagKeywords KaxTagLanguage KaxTagLegal KaxTagMood KaxTagMultiCommercial KaxTagMultiCommercialAddress KaxTagMultiCommercialEmail KaxTagMultiCommercialType KaxTagMultiCommercialURL KaxTagMultiDate KaxTagMultiDateDateBegin KaxTagMultiDateDateEnd KaxTagMultiDateType KaxTagMultiEntity KaxTagMultiEntityAddress KaxTagMultiEntityEmail KaxTagMultiEntityName KaxTagMultiEntityType KaxTagMultiEntityURL KaxTagMultiIdentifier KaxTagMultiIdentifierBinary KaxTagMultiIdentifierString KaxTagMultiIdentifierType KaxTagMultiLegal KaxTagMultiLegalAddress KaxTagMultiLegalType KaxTagMultiLegalURL KaxTagMultiPrice KaxTagMultiPriceAmount KaxTagMultiPriceCurrency KaxTagMultiPricePriceDate KaxTagMultiTitle KaxTagMultiTitleAddress KaxTagMultiTitleEdition KaxTagMultiTitleEmail KaxTagMultiTitleLanguage KaxTagMultiTitleName KaxTagMultiTitleSubTitle KaxTagMultiTitleType KaxTagMultiTitleURL KaxTagOfficialAudioFileURL KaxTagOfficialAudioSourceURL KaxTagOriginalDimensions KaxTagOriginalMediaType KaxTagPlayCounter KaxTagPopularimeter KaxTagProduct KaxTagRating KaxTagRecordLocation KaxTags KaxTagSetPart KaxTagSource KaxTagSourceForm KaxTagSubGenre KaxTagSubject KaxTagTargets KaxTagTitle KaxTagTrackUID KaxTagVideoGenre
• mkvmerge: Implemented time slice durations , default block duration and block durations for slices where necessary.

Bug fixes

• mkvmerge: Fixed a bug in the SRT reader which would not always handle Unix/DOS style new line cases correctly.
• mkvmerge: Fixed some infinite-reading-from-a-file bug that occured on Windows when reading SSA/ASS files.
• mkvmerge: Fixed a bug which would mostly appear with subtitles that have very long ( > 60s) gaps between entries. Here the cluster would not been rendered properly leaving mkvmerge either comatose ( = endless loop) or just plain dead ( = crashing).

Other changes

• base64tool: Added a tool for Base64 encoding/decoding needed for binary elements in the tags.
• mkvextract: Support for extracting chapter information.
• mkvmerge: The SSA/ASS reader ignored the --sub-charset option and always used the current charset to recode the subtitles.
• mkvinfo: Support for the elements dealing with attachments (KaxAttachments, KaxAttached, KaxFileDescription, KaxFileName, KaxMimeType, KaxFileData).
• mkvmerge: Changed the RealVideo packaging method: Subpackets are assembled into complete packets so the demuxer does not have to do that anymore.
• mkvmerge: DisplayWidth and DisplayHeight, which form the display aspect ratio, are now always written to ease changing them later without having to completely remux the file.
• Added a RealMedia demuxer that can handle both RealVideo and RealAudio (all codecs).
• mkvmerge: Support for handling native video tracks (e.g. B frames) when reading Matroska files.
• mkvinfo: Support for KaxSegmentFilename, KaxTitle, KaxSlices, KaxTimeSlice, KaxSliceLaceNumber, KaxSliceFrameNumber, KaxSliceDelay and KaxSliceDuration.

Version 0.5.0 2003-06-22

Important notes

• Made the AAC reader automatically recognize if a MPEG4 AAC file contains the emphasis header (deprecated) or not (current standard).

Bug fixes

• Fixed a double free() on cleanup (after writing the cues) which resulted in a segfault sometimes.

Other changes

• Added 'ReferencePriority' element to the known elements for mkvinfo.
• Removed "(mkvinfo) " from mkvinfo's output in order to improve readability and save space.
• --sub-charset now also needs a track ID.
• Modified the verbosity levels for mkvinfo: The seek head subentries and cue subentries will only be shown at level 2 to make the output easier to read.
• The language and default track settings are now kept again if not overridden when reading from Matroska files.
• Added mkvextract which can extract tracks from a Matroska file into other files.
• Switched from cygwin to MinGW32 for the Windows binaries.
• Added a SSA/ASS reader.
• Support for reading text subtitles from Matroska files.

Version 0.4.4 2003-06-15

New features and enhancements

• Added an option for identifying input files and their track types.

Other changes

• Several options now need an explicity track ID to specify which tracks of an input file the option should be applied to. These options include --atracks, --vtracks, --stracks, --sync, --default-track, --cues and --language.
• The Matroska reader now handles track selection correctly.

Version 0.4.3 2003-06-12

New features and enhancements

• Added support for splitting output files by size or by time and limiting the number of output files.
• Added support for the segment UID/next segment UID/previous segment UID.
• Implemented stricter content based file type identification for MP3 and AC-3 files so that those won't be mis-identified.
• Some improvements to the mkvinfo GUI (thanks to jcsston for the patch/the ideas).

Other changes

• Support for proper linking of segments via the segment UIDs. The first and last files created can be manually linked to given UIDs.
• A lot of changes to comply with libmatroska/libebml 0.4.4.

Version 0.4.2 2003-05-29

Bug fixes

• Fixed a segfault in the Matroska reader.

Other changes

• Support for some more tags in both mkvmerge and mkvinfo.
• Removed the '--sub-type' switch as all text subtitles will be stored in UTF-8 format. Made iconv mandatory in the configure checks for this very reason.
• Added a GUI to mkvinfo.

Version 0.4.1 2003-05-23

Other changes

• A lot of changes regarding file I/O. Files bigger than 2GB should now be handled correctly on both Linux and Windows.
• Added checks for MP4/Quicktime files which will abort mkvmerge.
• Support for reading AAC tracks from Matroska files.

Version 0.4.0 2003-05-22

New features and enhancements

• Some internal changes and enhancements. Code requires libebml and libmatroska 0.4.3 now.
• Added support for AAC files (only those with ADTS headers at the moment).

Bug fixes

• Fixed a bug with mono MP3 files.

Other changes

• ADTS headers are stripped from the AAC streams. This is what I'd call 'proper AAC support'.
• Better support for DTS streams in general and for DTS-in-WAV in particular (patch by Peter Niemayer <niemayer AT isg.de>).
• Renamed '--no-utf8-subs' to '--sub-type utf8'. Polished the man page regarding subtitle handling.

Version 0.3.3 2003-05-15

Bug fixes

• Fixed a bug with the AC-3 time code calculation (patch by Peter Niemayer <niemayer AT isg.de>).

Other changes

• If an error occurs while writing to the destination file the error is reported and mkvmerge aborts with a non-zero exit code.
• The OGM reader reported I frames as P frames and vice versa round making seeking not really nice ;)
• Support for reading DTS files & putting them into Matroska (main patch by Peter Niemayer <niemayer AT isg.de>, a few things by me).

Version 0.3.2 2003-05-11

New features and enhancements

• Added support for aspect ratio.

Bug fixes

• Fixed the huge memory need if reading from AVI files (introduced on 2003-05-06 with the internal changes).

Other changes

• Proper handling of the 'default track' flag and the language for the Matroska reader.
• Proper handling of the 'default track' flag for all the packetizers.
• Made mkvtoolnix compile under cygwin.
• Subtitle charsets can be specified with --sub-charset and do not rely on the current locale anymore.
• For the last packet of each track its duration is now stored.
• A lot of internal changes - I hope nothing has broken... (See ChangeLog.cvs for details.)
• The matroska reader calculated wrong header lengths for Vorbis tracks.
• mkvinfo reports the FourCC for video tracks with a CodecID of V_MS/VFW/FOURCC and the format tag for audio tracks with a CodecID of A_MS/ACM.

Version 0.3.1 2003-05-03

New features and enhancements

• Added support for EbmlVoid everywhere to mkvinfo.

Other changes

• Tracks read from a Matroska file will keep their UID if it hasn't been used yet.
• Support for reading text subtitle streams from OGM files.
• Support for KaxTrackLanguage and ISO 639 languages.