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

FFmpeg trac at avcodec.org
Thu Jul 29 23:27:04 EEST 2021


#9351: bug in several windows builds when reencoding h.264 to h.265 with GPU
-------------------------------------+-------------------------------------
             Reporter:  John Dury    |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:  ffmpeg gpu   |               Blocked By:
  buffer                             |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Comment (by John Dury):

 I thought my original post had all of the relevant information including
 the failure but it kept timing out when trying to post so maybe it did not
 go through correctly.
 The error I am getting is:
 [hevc_nvenc @ 0000001d5df021c0] Failed locking bitstream buffer: not
 enough buffer (14): .39x
 video encoding failed: Buffer too small
 This is easily reproduced when using the same MKV file. It has happened on
 several others also. There is no other GPU activity happening when the
 error occurs. I have tried this on two different machines with two
 different NVIDIA GPUs, both with their latest drivers. When regressing
 build levels it appears to not happen. I am testing older versions of
 gyan.dev builds now and will post results once I narrow down where the bug
 started.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9351#comment:10>
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