[FFmpeg-trac] #735(undetermined:open): Incorrect DTS sync in OGG codec

FFmpeg trac at avcodec.org
Tue Dec 13 12:07:48 CET 2011

#735: Incorrect DTS sync in OGG codec
             Reporter:  zvi          |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:  ogg vorbis   |               Resolution:
  sync                               |               Blocked By:
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  0            |
Changes (by cehoyos):

 * keywords:  ogg sync => ogg vorbis sync
 * status:  new => open
 * version:  0.8.7 => git-master
 * reproduced:  0 => 1


 Replying to [comment:3 zvi]:

 > * ffmpeg -y -i in.mp4 -vcodec libtheora -b 1000k -acodec libvorbis
 > * ffmpeg -y -i out.ogv -vcodec copy -acodec copy out2.ogv
 > * The resulting '''out.ogv''' file is broken (the audio drifts quickly
 and goes out of sync with the video).

 out.ogv plays fine afaict.
 (You should be able to edit your message.)

 The problem is for example reproducible with
 ffmpeg -i out.ogv -acodec copy out.mkv
 Resulting file is heavily out-of-sync.

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/735#comment:4>
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