[FFmpeg-trac] #5878(avdevice:new): x11grab slow with smaller -video_size

[FFmpeg]

#5878: x11grab slow with smaller -video_size
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             Reporter:  lolilolicon  |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avdevice
              Version:  unspecified  |               Resolution:
             Keywords:  x11grab      |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by cehoyos):

 Replying to [comment:8 lolilolicon]:
 > the correct command is `import -window root -crop WxH+X+Y +repage png:-`

 Isn't using the crop filter with FFmpeg also faster?

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Ticket URL: <https://trac.ffmpeg.org/ticket/5878#comment:9>
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