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matroskadec: fix index timestamps for some broken files

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fix issue697

Originally committed as revision 15829 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Aurelien Jacobs
2008-11-15 15:34:51 +00:00
parent 6ff1f61530
commit 8f569ed08f
1 changed files with 8 additions and 1 deletions
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9
libavformat/matroskadec.c
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@@ -1074,6 +1074,7 @@ static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
MatroskaTrack *tracks;
EbmlList *index_list;
MatroskaIndex *index;
int index_scale = 1;
Ebml ebml = { 0 };
AVStream *st;
int i, j;
@@ -1369,6 +1370,11 @@ static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
index_list = &matroska->index;
index = index_list->elem;
if (index_list->nb_elem
&& index[0].time > 100000000000000/matroska->time_scale) {
av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
index_scale = matroska->time_scale;
}
for (i=0; i<index_list->nb_elem; i++) {
EbmlList *pos_list = &index[i].pos;
MatroskaIndexPos *pos = pos_list->elem;
@@ -1378,7 +1384,8 @@ static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
if (track && track->stream)
av_add_index_entry(track->stream,
pos[j].pos + matroska->segment_start,
index[i].time, 0, 0, AVINDEX_KEYFRAME);
index[i].time/index_scale, 0, 0,
AVINDEX_KEYFRAME);
}
}