[FFmpeg-trac] #3045(undetermined:closed): x11grab does not handle missed frames properly

[FFmpeg]

#3045: x11grab does not handle missed frames properly
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             Reporter:               |                    Owner:
  levialliance                       |                   Status:  closed
                 Type:  defect       |                Component:
             Priority:  important    |  undetermined
              Version:  git-master   |               Resolution:  invalid
             Keywords:  x11grab      |               Blocked By:
  regression                         |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |
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Comment (by jmarion):

 Using -framerate instead of -r doesn't actually fix the issue. It's easy
 to reproduce with an excessively high frame rate and corresponding high
 dropped frame count. In my environment using ffmpeg 2.6.2 trying to
 capture 3 seconds of 1920x1080 at 100fps only manages to capture 47 frames
 which results in a duration of 0.47 seconds rather than the correct 3
 seconds.

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Ticket URL: <https://trac.ffmpeg.org/ticket/3045#comment:8>
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