[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
-------------------------------------+-------------------------------------
             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 John Dury):

 I added -qf 0 and tried again on both machines with different GPUs and I
 get the same error using the latest (08/01) gyan binaries.
 [hevc_nvenc @ 0000017fefe4afc0] Failed locking bitstream buffer: not
 enough buffer (14): .95x
 video encoding failed: Buffer too small error.
 The two GPUs are a GTX 1050 Ti and a GTX 980M if it matters.

 Replying to [comment:25 Balling]:
 > It is -c:v hevc_nvenc -bf 0. And yes, it is permanent workaround, since
 that was the default before a0949d0bcb0eee2f3fffcf9a4810c0295d14c0dc.
 > "Did change -hwaccel to cuda" that is the same as nvdec and will be the
 same as cuvid (foe now cuvid also implied format cuda).
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9351#comment:26>
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