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offset dts according to edit list, hackish but works, based on patch by Reimar

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Originally committed as revision 17037 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2009-02-08 04:27:07 +00:00
parent 6bab479955
commit baf2ffd329
1 changed files with 14 additions and 3 deletions
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17
libavformat/mov.c
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@ -125,6 +125,7 @@ typedef struct MOVStreamContext {
int *keyframes;
int time_scale;
int time_rate;
int time_offset; /// time offset of the first edit list entry
int current_sample;
unsigned int bytes_per_frame;
unsigned int samples_per_frame;
@ -1231,6 +1232,12 @@ static void mov_build_index(MOVContext *mov, AVStream *st)
unsigned int stss_index = 0;
unsigned int i, j;
/* adjust first dts according to edit list */
if (sc->time_offset) {
assert(sc->time_offset % sc->time_rate == 0);
current_dts = - (sc->time_offset / sc->time_rate);
}
/* only use old uncompressed audio chunk demuxing when stts specifies it */
if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
@ -1762,10 +1769,14 @@ static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
get_be32(pb); /* Track duration */
time = get_be32(pb); /* Media time */
get_be32(pb); /* Media rate */
if (time != 0)
av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "
"a/v desync might occur, patch welcome\n");
if (i == 0 && time != -1)
sc->time_offset = time;
}
if(edit_count > 1)
av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
"a/v desync might occur, patch welcome\n");
dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
return 0;
}