[FFmpeg-trac] #8450(avdevice:reopened): x11grab doesn't work with headless X servers

[FFmpeg]

#8450: x11grab doesn't work with headless X servers
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             Reporter:  eero-t      |                    Owner:
                 Type:  defect      |                   Status:  reopened
             Priority:  normal      |                Component:  avdevice
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by eero-t):

 > In the Xvfb case, I can add "-shmem" option to get X root window to be
 available as shared memory:
 > HOWEVER, while that gets FFmpeg streaming working, then the use-cases
 which output I'd like to stream, don't work!

 FYI: with Xvfb "-shmem" root window option, !ShmPutImage() calls will fail
 in (fullscreen) applications.

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Ticket URL: <https://trac.ffmpeg.org/ticket/8450#comment:3>
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