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avformat/matroskadec: Detect conflicting sample rate/default_duration 

Fixes Ticket2508

Thanks-to: Moritz Bunkus
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-07-15 17:13:45 +02:00
parent 3ea765b033
commit 6158a3bcdf
1 changed files with 10 additions and 1 deletions
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11
libavformat/matroskadec.c
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@ -2364,6 +2364,7 @@ static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
uint32_t *lace_size = NULL;
int n, flags, laces = 0;
uint64_t num;
int trust_default_duration = 1;
if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
@ -2418,7 +2419,15 @@ static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
if (res)
goto end;
if (!block_duration)
if (track->audio.samplerate == 8000) {
// If this is needed for more codecs, then add them here
if (st->codec->codec_id == AV_CODEC_ID_AC3) {
if(track->audio.samplerate != st->codec->sample_rate || !st->codec->frame_size)
trust_default_duration = 0;
}
}
if (!block_duration && trust_default_duration)
block_duration = track->default_duration * laces / matroska->time_scale;
if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))