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matroskadec: fix lace vs block duration.

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Fixes Ticket1270

Thanks-to: Moritz Bunkus
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-08-08 17:53:41 +02:00
parent dbf25b70ea
commit ee475e272e
1 changed files with 12 additions and 7 deletions
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19
libavformat/matroskadec.c
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@ -1886,8 +1886,6 @@ static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
if (st->discard >= AVDISCARD_ALL)
return res;
av_assert1(duration != AV_NOPTS_VALUE);
if (!duration)
duration = track->default_duration / matroska->time_scale;
block_time = AV_RB16(data);
data += 2;
@ -1904,7 +1902,6 @@ static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
is_keyframe = 0; /* overlapping subtitles are not key frame */
if (is_keyframe)
av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
track->end_timecode = FFMAX(track->end_timecode, timecode+duration);
}
if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
@ -1995,7 +1992,15 @@ static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
}
if (res == 0) {
if (!duration)
duration = track->default_duration * laces / matroska->time_scale;
if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
track->end_timecode = FFMAX(track->end_timecode, timecode+duration);
for (n = 0; n < laces; n++) {
int64_t lace_duration = duration*(n+1) / laces - duration*n / laces;
if (lace_size[n] > size) {
av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
break;
@ -2101,12 +2106,12 @@ static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
pkt->pts = timecode;
pkt->pos = pos;
if (st->codec->codec_id == AV_CODEC_ID_TEXT)
pkt->convergence_duration = duration;
pkt->convergence_duration = lace_duration;
else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
pkt->duration = duration;
pkt->duration = lace_duration;
if (st->codec->codec_id == AV_CODEC_ID_SSA)
matroska_fix_ass_packet(matroska, pkt, duration);
matroska_fix_ass_packet(matroska, pkt, lace_duration);
if (matroska->prev_pkt &&
timecode != AV_NOPTS_VALUE &&
@ -2121,7 +2126,7 @@ static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
}
if (timecode != AV_NOPTS_VALUE)
timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
data += lace_size[n];
size -= lace_size[n];
}