demux_mkv: don't trust DefaultDuration for audio

It's used to interpolate timestamps for sub-packets ("block laces").
It's occasionally broken, and not really needed by us.

1 files changed, 3 insertions, 5 deletions

diff --git a/demux/demux_mkv.c b/demux/demux_mkv.c
index e99d8a2c63..7b5efd8219 100644
--- a/demux/demux_mkv.c
+++ b/demux/demux_mkv.c
@@ -1687,11 +1687,9 @@ static int demux_mkv_open_audio(demuxer_t *demuxer, mkv_track_t *track)
         sh_a->samplerate = 48000;
     }
 
-    // Some files have broken default DefaultDuration set, which will lead to
-    // audio packets with incorrect timestamps. This follows FFmpeg commit
-    // 6158a3b, sample see FFmpeg ticket 2508.
-    if (sh_a->samplerate == 8000 && strcmp(codec, "ac3") == 0)
-        track->default_duration = 0;
+    // This field tends to be broken, and our decoder can interpolate the
+    // missing timestamps anyway.
+    track->default_duration = 0;
 
     sh_a->extradata = extradata;
     sh_a->extradata_size = extradata_len;