[FFmpeg-trac] #9351(undetermined:open): bug in several windows builds when reencoding h.264 to h.265 with GPU

[FFmpeg]

#9351: bug in several windows builds when reencoding h.264 to h.265 with GPU
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             Reporter:  John Dury    |                    Owner:  Timo R.
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:  ffmpeg gpu   |               Blocked By:
  buffer                             |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Balling):

 Real workaround is -bf 0. Sigh, just like was in #9130. [Or of course just
 do not use -
 hwaccel_output_format cuda.]

 ffmpeg-2021-05-30-git-51f1194eda-full_build also has this problem, since
 it also has this a0949d0bcb0eee2f3fffcf9a4810c0295d14c0dc that lead to
 #9130.

 Still, it is strange that -extra_hw_frames 5 does not work for you. Maybe
 you GPU cannot do it?
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Ticket URL: <https://trac.ffmpeg.org/ticket/9351#comment:23>
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