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movenc: Allow chapters to be written in trailer

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This allows creation of frame accurate chapter marks from sources
like DVD and BD where the precise chapter location is not known until
the chapter mark has been reached during reading.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
John Stebbins 2013-08-19 16:05:30 -07:00 committed by Martin Storsjö
parent db03cb37fd
commit 6c786765cd
1 changed files with 15 additions and 2 deletions
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17
libavformat/movenc.c
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@ -3074,7 +3074,9 @@ static int mov_write_header(AVFormatContext *s)
}
}
mov->tracks = av_mallocz(mov->nb_streams * sizeof(*mov->tracks));
// Reserve an extra stream for chapters for the case where chapters
// are written in the trailer
mov->tracks = av_mallocz((mov->nb_streams + 1) * sizeof(*mov->tracks));
if (!mov->tracks)
return AVERROR(ENOMEM);
@ -3212,8 +3214,19 @@ static int mov_write_trailer(AVFormatContext *s)
AVIOContext *pb = s->pb;
int res = 0;
int i;
int64_t moov_pos;
int64_t moov_pos = avio_tell(pb);
// If there were no chapters when the header was written, but there
// are chapters now, write them in the trailer. This only works
// when we are not doing fragments.
if (!mov->chapter_track && !(mov->flags & FF_MOV_FLAG_FRAGMENT)) {
if (mov->mode & (MODE_MP4|MODE_MOV|MODE_IPOD) && s->nb_chapters) {
mov->chapter_track = mov->nb_streams++;
mov_create_chapter_track(s, mov->chapter_track);
}
}
moov_pos = avio_tell(pb);
if (!(mov->flags & FF_MOV_FLAG_FRAGMENT)) {
/* Write size of mdat tag */