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");
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))