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[Sebastian Ramacher <964197@xxxxxxxxxxxxxxxxxx>]

If this is still an issue in newer versions of libav, please follow
https://libav.org/bugreports.html and report the issue upstream.

** Changed in: libav (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/964197

Title:
  audio and video out of sync when extracting a piece of stream with -ss
  and -t

Status in libav package in Ubuntu:
  Incomplete

Bug description:
  The following command:
  ffmpeg -ss 00:02:20 -t 7 -i esqueletos.flv -vcodec mjpeg -s 640x480 -qmin 0.8 -qmax 0.8 -acodec copy esqueletos.mov

  should transcode a piece of video of a duration of 7 seconds starting
  from 00:02:20.

  It actually generates a 7 second video, but the audio does not
  correspond to the video, as if it was read out of synchro.

  
  Reporting libav bugs on ubuntu is very frustrating, because many of them have already been fixed ages ago upstream in ffmpeg (I have no idea whether this is the case of this particular bug). I wonder why ubuntu uses a fork of ffmpeg which is ages behind in development...

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: ffmpeg 4:0.7.3-0ubuntu0.11.10.1
  ProcVersionSignature: Ubuntu 3.0.0-17.30-generic 3.0.22
  Uname: Linux 3.0.0-17-generic i686
  NonfreeKernelModules: nvidia
  ApportVersion: 1.23-0ubuntu4
  Architecture: i386
  Date: Sat Mar 24 23:32:31 2012
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: libav
  UpgradeStatus: Upgraded to oneiric on 2011-12-07 (108 days ago)

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