[FFmpeg-trac] #1186(avformat:new): Regression in duration calculation for ogg files.

FFmpeg trac at avcodec.org
Wed Apr 11 00:45:14 CEST 2012

#1186: Regression in duration calculation for ogg files.
             Reporter:  dalecurtis  |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |

Comment (by dalecurtis):

 Agreed on documentation! I'm working on cleaning all this up now, so
 hopefully we can reduce miscommunication in the future :) Thanks for your
 patience in any case.

 Looks like it still an issue today though, so probably worth leaving the
 bug open.

 FWIW, recreating sync1 and sync2 from wav to ogg using a fresh FFmpeg with
 either libvorbis or vorbis (sync2 only) results in files which still
 trigger this issue today though.  In fact, every file I've tried to
 convert to a 30 sec ogg ends up being ~5 secs short.

 Here's the command line I'm using:
 ffmpeg -t 30 -acodec libvorbis -vn -i <...> <out>.ogg

 Should I be doing something else?

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1186#comment:2>
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