[FFmpeg-trac] #9578(ffplay:new): FFplay ignores stdin

[FFmpeg]

#9578: FFplay ignores stdin
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             Reporter:  btdmaster  |                     Type:  defect
               Status:  new        |                 Priority:  normal
            Component:  ffplay     |                  Version:  4.4.1
             Keywords:             |               Blocked By:
             Blocking:             |  Reproduced by developer:  0
Analyzed by developer:  0          |
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 FFplay ignores stdin; only the window spawned can be used to control
 output.

 Steps to reproduce:
 ffplay arbitraryvideofile.mkv # or any other file
 # Go back to spawning terminal emulator. Type in q to quit.

 Expected result:
 FFplay would quit.

 Actual result:
 Terminal emulator receives stdin, FFmpeg does nothing.

 The same applies for all the other hotkeys. This is worse with -nodisp, as
 the lack of a graphical display means that, effectively, there is no way
 to modify the output like change volume. Because of this it is important
 that FFplay takes into account input from stdin.
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Ticket URL: <https://trac.ffmpeg.org/ticket/9578>
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