[FFmpeg-trac] #10270(ffmpeg:reopened): Random duration changes when transcoding ogg vorbis

FFmpeg trac at avcodec.org
Sun Mar 19 13:24:53 EET 2023

#10270: Random duration changes when transcoding ogg vorbis
             Reporter:  Ace17       |                    Owner:  (none)
                 Type:  defect      |                   Status:  reopened
             Priority:  normal      |                Component:  ffmpeg
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
Comment (by Balling):

 I do have  --enable-libvorbis. Moreover I have
 https://github.com/xiph/vorbis.git at commit
 84c023699cdf023a32fa4ded32019f194afcdad0. And yes, by default 8 bytes*4
 are different between -c:a libvorbis and just .ogg.

 >can we at least agree here that something strange is going on in the
 "start:" and "Duration:" output of ffprobe ?

 There is no such issue in ffprobe here.

 And it does not matter what the duration is, what matters is that it makes
 it gapless and does not lose the sync.
Ticket URL: <https://trac.ffmpeg.org/ticket/10270#comment:5>
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