[FFmpeg-trac] #8774(undetermined:open): "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)" error message

[FFmpeg]

#8774: "Output file is empty, nothing was encoded (check -ss / -t / -frames
parameters if used)" error message
-------------------------------------+-------------------------------------
             Reporter:               |                    Owner:
  Mohammed.Bey                       |  Mohammed.Bey
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  v4l2m2m      |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by taliho):

 - Can you confirm that you applied this patch before decoding the 720p
 stream?
 https://patchwork.ffmpeg.org/project/ffmpeg/patch/20200509173541.7667-1-andriy.gelman@gmail.com/
 And that the patch fixes a seg fault? (this is how I understand the ML
 thread)

 - Please post console output with -loglevel debug option set. Post the log
 for the case that works and when it doesn't work.

 - Did release 3.4.7 ever work when decoding the 720p stream?

 - Please check output of dmesg when decoding fails and post the results if
 they contain error messages from the driver

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Ticket URL: <https://trac.ffmpeg.org/ticket/8774#comment:6>
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