[FFmpeg-trac] #2499(avformat:new): gif -> mp4: wrong timestamps / duration

[FFmpeg]

#2499: gif -> mp4: wrong timestamps / duration
-------------------------------------+-------------------------------------
             Reporter:  sgehlich     |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  avformat     |                  Version:
             Keywords:  gif, mp4,    |  unspecified
  muxer                              |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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 Summary of the bug:
 When converting .GIFs with different frame durations, the mp4 muxer (same
 with mpeg2) generates a wrong video with wrong frame durations.

 first frame is rendered with default duration
 second frame is rendered with the duration the first frame should have
 third frame is rendered with the duratino the second frame should have
 etc.

 How to reproduce:
 {{{
 % wget http://forgif.me/system/image/4759/image.gif
 % ffmpeg -i image.gif -pix_fmt yuv420p ghost.mp4
 }}}

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2499>
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