[FFmpeg-trac] #7800(avformat:new): ffmpeg fails to get the duration of some webm files

[FFmpeg]

#7800: ffmpeg fails to get the duration of some webm files
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             Reporter:  KTSamy      |                    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           |
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Comment (by KTSamy):

 The sample file can be found here
 https://www.dropbox.com/s/bqfe8efhwxwene1/Lydian%27s%20Two-
 Piano%20Medley%20for%20%241M%20Prize%20-%20The%20World%27s%20Best%20Finale.webm?dl=1

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Ticket URL: <https://trac.ffmpeg.org/ticket/7800#comment:1>
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