[FFmpeg-trac] #5456(undetermined:new): Videos produced with -shortest are longer than the audio

FFmpeg trac at avcodec.org
Wed Apr 20 19:35:08 CEST 2016


#5456: Videos produced with -shortest are longer than the audio
-------------------------------------+-------------------------------------
             Reporter:  hmemcpy      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 I tried following the guide for converting an audio file to video for
 YouTube, and I noticed that when using the `-shortest` switch, the videos
 produced were about 10 seconds longer than the audio track, and it was
 impossible to skip.

 After some searching, I found an old thread that suggests this was a bug
 introduced sometime in 2012, and suggested using an older version.

 I was able to find that last good build, after which the bug happens!
 Last good build was: `ffmpeg-20120720-git-85761ef` found here:
 https://ffmpeg.zeranoe.com/builds/win64/static/

 All subsequent versions after it, including the very latest, have this
 incorrect behavior.


 How to reproduce:
 Attached is an 8 second .flac file (and an image for still frame) Run the
 following:
 {{{
 ffmpeg -loop 1 -framerate 1 -i bg.jpg -i recit24bit.flac -shortest
 output.mp4
 }}}

 When done with the "good" build 85761ef, the resulting mp4 is 10 seconds
 long

 When done with any other newer version, the resulting mp4 is 1 minute 08
 seconds on my machine.

 See attached logs for additional info.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5456>
FFmpeg <https://ffmpeg.org>
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