Opened 9 years ago

Last modified 7 years ago

#363 assigned defect

Vorbis in mkv audio

Reported by: roine Owned by: astrange
Priority: normal Milestone: 1.3
Component: decompression Version: 1.1
Severity: normal Keywords:


This movie clip has a Vorbis audio track that doesn't work correctly. When seeking or stopping/starting, the audio works for a few seconds and then dies. If this clip is remuxed in ffmpeg the audio works correctly.
Most mkv's + Vorbis audio works fine, so this is a (rare) exception.

This kind of problem is usually caused by some wrong values in the sounddescription, but I've tried debugging it and all frames, pts/dts, sounddescriptions etc are equal between the original and remuxed, except for 'bits per sample' which is not set in the original. However fixing that value it doesn't fix the audio playback. The only other difference is packet sizes which are smaller (!) in the remuxed version that works.

Submitting a 400k snippet of a movie. Unfortunately the clip is silent in the beginning. Seek to 0:25 and play to hear some audio.
Note that this clip exhibits the EmblVoid? that crashes Perian, so it needs to be fixed first. See #361 for fix.
Also note that the audio track is turned off, so it needs turning on first!

Attachments (1)

vorbisbroken.mkv (400.0 KB) - added by roine 9 years ago.

Download all attachments as: .zip

Change History (3)

Changed 9 years ago by roine

comment:1 Changed 7 years ago by astrange

  • Milestone set to 1.2.2

comment:2 Changed 7 years ago by astrange

  • Component changed from Perian-Main to decompression
  • Milestone changed from 1.2.2 to 1.3
  • Owner set to astrange
  • Status changed from new to assigned

Confirmed in 1.2.2. I don't know the problem and there are no complaints logged from audio... punting.

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