[FFmpeg-trac] #5309(undetermined:new): Seek doesn't work in some .mp4 files

[FFmpeg]

#5309: Seek doesn't work in some .mp4 files
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             Reporter:  Arnaud       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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 Summary of the bug:
 How to reproduce:
 {{{
 % ffplay -ss 5
 ffmpeg version: ffplay version N-78958-g8c24523
 built from latest git, on Ubuntu 14.04.3, on 2016-03-07
 }}}

 File is seek_not_working.mp4

 The file plays well but always from the beginning: the seek isn't working.

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Ticket URL: <https://trac.ffmpeg.org/ticket/5309>
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