From 06190d75d09a2c2ac7d080c0633eef3fd2d51dca Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 15 Jul 2013 17:13:45 +0200 Subject: [PATCH] avformat/matroskadec: Detect conflicting sample rate/default_duration Fixes Ticket2508 Thanks-to: Moritz Bunkus Signed-off-by: Michael Niedermayer (cherry picked from commit 6158a3bcdf52fafc1d9ae9eb358a56c614b23aa3) --- libavformat/matroskadec.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c index f8cd81f2ba..af407d7c56 100644 --- a/libavformat/matroskadec.c +++ b/libavformat/matroskadec.c @@ -2205,6 +2205,7 @@ 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"); @@ -2259,7 +2260,15 @@ 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))