MKVToolNix 7.4.0

Table of contents

1. Introduction

2. Installation

3. Requirements

4. Optional components

5. Building libmatroska and libebml

6. Building MKVtoolNix

7. Notes for compilation on (Open)Solaris

8. Unit tests

9. Examples

10. Reporting bugs

11. Introduction

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With these tools one can get information about (mkvinfo) Matroska files, extract tracks/data from (mkvextract) Matroska files and create (mkvmerge) Matroska files from other media files. Matroska is a new multimedia file format aiming to become THE new container format for the future. You can find more information about it and its underlying technology, the Extensible Binary Meta Language (EBML), at

http://www.matroska.org/

The full documentation for each command is now maintained in its man page only. Type mkvmerge -h to get you started.

This code comes under the GPL v2 (see www.gnu.org or the file COPYING). Modify as needed.

The icons are based on the work of Alexandr Grigorcea and modified by Eduard Geier. They're licensed under the terms of the Creative Commons Attribution 3.0 Unported license (see http://creativecommons.org/licenses/by/3.0/).

The newest version can always be found at http://www.bunkus.org/videotools/mkvtoolnix/

Moritz Bunkus moritz@bunkus.org

2. Installation

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If you want to compile the tools yourself then you must first decide if you want to use a 'proper' release version or the current development version. As both Matroska and MKVToolNix are under heavy development there might be features available in the git repository that are not available in the releases. On the other hand the git repository version might not even compile.

2.1. Requirements

In order to compile MKVToolNix you need a couple of libraries. Most of them should be available pre-compiled for your distribution. The programs and libraries you absolutely need are:

• A C++ compiler that supports several features of the C++11 standard: initializer lists, range-based 'for' loops, right angle brackets, the 'auto' keyword and lambda functions. For GCC this means at least v4.6.0.

• libEBML v1.3.1 or later and libMatroska v1.4.2 or later for low-level access to Matroska files. Instructions on how to compile them are a bit further down in this file.

• libOgg ( http://downloads.xiph.org/releases/ogg/ ) and libVorbis ( http://downloads.xiph.org/releases/vorbis/ ) for access to Ogg/OGM files and Vorbis support

• zlib ( http://www.zlib.net/ ) -- a compression library

• Boost ( http://www.boost.org/ ) -- Several of Boost's libraries are used: "format", "RegEx", "filesystem", "system", "foreach", "Range", "rational", "variant". At least v1.46.0 is required.

You also need the rake or drake build program or at least the programming language Ruby and the "rubygems" package. MKVToolNix comes bundled with its own copy of "drake" in case you cannot install it yourself. If you want to install it yourself I suggest you use the "drake" version because it will be able to use all available CPU cores for parallel builds.

Installing "drake" is simple. As root run the following command:

gem install drake

2.2. Optional components

Other libraries are optional and only limit the features that are built. These include:

• wxWidgets ( http://www.wxwidgets.org/ ) -- a cross-platform GUI toolkit. You need this if you want to use mmg (the mkvmerge GUI) or mkvinfo's GUI.

• libFLAC ( http://downloads.xiph.org/releases/flac/ ) for FLAC support (Free Lossless Audio Codec)

• lzo ( http://www.oberhumer.com/opensource/lzo/ ) and bzip2 ( http://www.bzip.org/ ) are compression libraries. These are the least important libraries as almost no application supports Matroska content that is compressed with either of these libs. The aforementioned zlib is what every program supports.

• libMagic from the "file" package ( http://www.darwinsys.com/file/ ) for automatic content type detection

• libcurl ( http://curl.haxx.se/ ) for online update checks

2.3. Building libmatroska and libebml

This is optional as MKVToolNix comes with its own set of the libraries. It will use them if no version is found on the system.

Start with the two libraries. Either get libebml 1.3.1 from http://dl.matroska.org/downloads/libebml/ and libmatroska 1.4.2 from http://dl.matroska.org/downloads/libmatroska/ or a fresh copy from the git repository:

git clone https://github.com/Matroska-Org/libebml.git
git clone https://github.com/Matroska-Org/libmatroska.git

Change to "libebml/make/linux" and run make staticlib. If you have root-access then run make install_headers install_staticlib as "root" in order to install the files. Change to "libmatroska/make/linux". Once more run make staticlib. If you have root-access then run make install_headers install_staticlib as "root" in order to install the files.

Note that if you don't want the libraries to be installed in /usr/local/lib and the headers in /usr/local/include then you can alter the prefix (which defaults to /usr/local) by adding an argument prefix=/usr to the install make command. Example:

make prefix=/usr install_headers install_staticlib

2.4. Building MKVtoolNix

Either download the current release from http://www.bunkus.org/videotools/mkvtoolnix/ and unpack it or get a development snapshot from my Git repository.

• Getting and building a development snapshot (ignore this subsection if you want to build from a release tarball)

  All you need for Git repository access is to download a Git client from the Git homepage at http://git-scm.com/ . There are clients for both Unix/Linux and Windows.

  First clone my Git repository with this command:

  git clone https://github.com/mbunkus/mkvtoolnix.git
  

  Now change to the MKVtoolNix directory with cd mkvtoolnix and run ./autogen.sh which will generate the "configure" script. You need the GNU "autoconf" utility for this step.

If you have run make install for both libraries then configure should automatically find the libraries' position. Otherwise you need to tell configure where the "libebml" and "libmatroska" include and library files are:

./configure \
  --with-extra-includes=/where/i/put/libebml\;/where/i/put/libmatroska \
  --with-extra-libs=/where/i/put/libebml/make/linux\;/where/i/put/libmatroska/make/linux

Now run rake and, as "root", rake install. If you don't have "rake" installed yourself then use the version bundled with MKVToolNix: ./rake.d/bin/drake and ./rake.d/bin/drake install.

If you want to use all available CPU cores for building then you have to use drake instead of rake. drake knows the parameter -j much like make does. You can also set the environment variable DRAKETHREADS to a number and the build process will automatically use that number of threads for a parallel build:

./drake -j4

or

export DRAKETHREADS=4
./drake

2.5. Notes for compilation on (Open)Solaris

You can compile mkvtoolnix with Sun's sunstudio compiler, but you need additional options for configure:

./configure --prefix=/usr \
  CXX="/opt/sunstudio12.1/bin/CC -library=stlport4" \
  CXXFLAGS="-D_POSIX_PTHREAD_SEMANTICS" \
  --with-extra-includes=/where/i/put/libebml\;/where/i/put/libmatroska \
  --with-extra-libs=/where/i/put/libebml/make/linux\;/where/i/put/libmatroska/make/linux

2.6. Unit tests

Building and running unit tests is completely optional. If you want to do this then you have to follow these steps:

1. Download the "googletest" framework from http://code.google.com/p/googletest/ (at the time of writing the file to download was "gtest-1.6.0.zip")

2. Make gtest usable:

3. Either extract the framework inside the "lib" sub-folder and rename the resulting folder "gtest-1.6.0" to "gtest"

   OR...

4. Extract the archive somewhere and create a symbolic link to it inside the "lib" folder called or create a symbolic link called "gtest".

5. Configure MKVToolNix normally.

6. Build the unit test executable and run it with

    ./drake tests:unit
   

7. Examples

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Here's a very brief example of how you could use mkvmerge with mencoder in order to rip a DVD:

1. Extract the audio to PCM audio:

    mplayer -ao pcm:file=audio.wav -vo null -vc dummy dvd://1
   

2. Normalize the sound (optional)

    normalize audio.wav
   

3. Encode the audio to Vorbis:

    oggenc -q3 -oaudio-q3.ogg audio.wav
   

4. Somehow calculate the bitrate for your video. Use something like:

video_size = (target_size - audio-size) / 1.005
video_bitrate = video_size / length / 1024 * 8

• target_size, audio_size in bytes
• length in seconds
• 1.005 is the overhead caused by putting the streams into an Matroska file (about 0.5%, that's correct ;)).
• video_bitrate will be in kbit/s

5. Use the two-pass encoding for the video:

    mencoder -oac copy -ovc lavc \
      -lavcopts vcodec=mpeg4:vbitrate=1000:vhq:vqmin=2:vpass=1 \
      -vf scale=....,crop=..... \
      -o /dev/null dvd://1
   
    mencoder -oac copy -ovc lavc \
      -lavcopts vcodec=mpeg4:vbitrate=1000:vhq:vqmin=2:vpass=2 \
      -vf scale=....,crop=..... \
      -o movie.avi dvd://1
   

6. Merge:

    mkvmerge -o movie.mkv -A movie.avi audio-q3.ogg
   

-A is necessary in order to avoid copying the raw PCM (or MP3) audio as well.

4. Reporting bugs

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If you're sure you've found a bug - e.g. if one of my programs crashes with an obscur error message, or if the resulting file is missing part of the original data, then by all means submit a bug report.

I use Trac (https://trac.bunkus.org/) as my bug database. You can submit your bug reports there. Please be as verbose as possible - e.g. include the command line, if you use Windows or Linux etc.pp.

If at all possible please include sample files as well so that I can reproduce the issue. If they are larger than 1M then please upload them somewhere (e.g. to my FTP server: host name ftp.bunkus.org, user name upload, password only) and post a link or note in the bug report.