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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.

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This commit is contained in:
Moritz Bunkus 2003-08-27 17:44:33 +00:00
parent 073cc2a367
commit c8ceb5dd87
3 changed files with 33 additions and 10 deletions
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4
ChangeLog
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@ -1,5 +1,9 @@
2003-08-27 Moritz Bunkus <moritz@bunkus.org>
* 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
timecodes. It does now.

2
src/mkvextract.h
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@ -67,6 +67,8 @@ typedef struct {
float v_fps;
int v_width, v_height;
int64_t default_duration;
int srt_num;
int conv_handle;
vector<ssa_line_c> ssa_lines;

37
src/mkvextract_tracks.cpp
View File

@ -127,6 +127,13 @@ static void create_output_files() {
// Video tracks:
if (tracks[i].track_type == 'v') {
tracks[i].type = TYPEAVI;
if (strcmp(tracks[i].codec_id, MKV_V_MSCOMP)) {
mxwarn("Extraction of video tracks with a CodecId "
"other than " MKV_V_MSCOMP " is not supported at the "
"moment. Skipping track %lld.\n", tracks[i].tid);
continue;
}
if ((tracks[i].v_width == 0) || (tracks[i].v_height == 0) ||
(tracks[i].v_fps == 0.0) || (tracks[i].private_data == NULL) ||
(tracks[i].private_size < sizeof(alBITMAPINFOHEADER))) {
@ -135,13 +142,6 @@ static void create_output_files() {
continue;
}
if (strcmp(tracks[i].codec_id, MKV_V_MSCOMP)) {
mxwarn("Extraction of video tracks with a CodecId "
"other than " MKV_V_MSCOMP " is not supported at the "
"moment. Skipping track %lld.\n", tracks[i].tid);
continue;
}
} else if (tracks[i].track_type == 'a') {
if ((tracks[i].a_sfreq == 0.0) || (tracks[i].a_channels == 0)) {
mxwarn("Track ID %lld is missing some critical "
@ -415,10 +415,15 @@ static void create_output_files() {
// {{{ FUNCTION handle_data()
#define myrnd(a) ((int)(a) == (int)((a) + 0.5) ? (int)(a) : (int)((a) + 0.5))
#define myabs(a) ((a) < 0 ? (a) * -1 : (a))
static int dropped = 0;
static void handle_data(KaxBlock *block, int64_t block_duration,
bool has_ref) {
kax_track_t *track;
int i, len, num;
int i, k, len, num;
int64_t start, end;
char *s, buffer[200], *s2, adts[56 / 8];
vector<string> fields;
@ -431,6 +436,9 @@ static void handle_data(KaxBlock *block, int64_t block_duration,
return;
}
if (block_duration == -1)
block_duration = track->default_duration;
start = block->GlobalTimecode() / 1000000; // in ms
end = start + block_duration;
@ -440,6 +448,11 @@ static void handle_data(KaxBlock *block, int64_t block_duration,
case TYPEAVI:
AVI_write_frame(track->avi, (char *)data.Buffer(), data.Size(),
has_ref ? 0 : 1);
if (myabs(block_duration - (int64_t)(1000.0 / track->v_fps)) > 1) {
int nfr = myrnd(block_duration * track->v_fps / 1000.0);
for (k = 2; k <= nfr; k++)
AVI_write_frame(track->avi, "", 0, 0);
}
break;
case TYPEOGM:
@ -693,6 +706,8 @@ static void close_files() {
}
}
}
mxinfo("\nDROPPED: %u\n", dropped);
}
// }}}
@ -1028,8 +1043,10 @@ bool extract_tracks(const char *file_name) {
"a video track)",
(float)uint64(def_duration) / 1000000.0,
1000000000.0 / (float)uint64(def_duration));
if (track != NULL)
if (track != NULL) {
track->v_fps = 1000000000.0 / (float)uint64(def_duration);
track->default_duration = uint64(def_duration) / 1000000;
}
} else
l3->SkipData(*es, l3->Generic().Context);
@ -1119,7 +1136,7 @@ bool extract_tracks(const char *file_name) {
} else if (EbmlId(*l2) == KaxBlockGroup::ClassInfos.GlobalId) {
show_element(l2, 2, "Block group");
block_duration = 0;
block_duration = -1;
has_reference = false;
l3 = es->FindNextElement(l2->Generic().Context, upper_lvl_el,
0xFFFFFFFFL, false, 1);