[FFmpeg-trac] #11390(ffmpeg:new): av1_nvenc output frames sometimes cannot be decoded

[FFmpeg]

#11390: av1_nvenc output frames sometimes cannot be decoded
------------------------------------+----------------------------------
             Reporter:  nikomo      |                    Owner:  (none)
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  ffmpeg
              Version:  git-master  |               Resolution:
             Keywords:  av1_nvenc   |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
------------------------------------+----------------------------------
Comment (by nikomo):

 I tried this.
 {{{
 @echo off
 .\ffmpeg.exe -y -hwaccel cuda -hwaccel_output_format cuda -i
 test_input.mkv -c:v hevc_nvenc -preset:v p1 -tune:v lossless -profile:v
 main -tier:v high -rc:v constqp -rc-lookahead:v 0 -2pass:v 0 -qp:v 0
 -multipass:v 0 -lookahead_level:v 0 -split_encode_mode:v 1 -c:a copy -c:s
 copy -c:d copy tmp.mkv
 .\ffmpeg.exe -y -hwaccel cuda -hwaccel_output_format cuda -i tmp.mkv -c:v
 av1_nvenc -preset:v p7 -tune:v uhq -rc:v vbr -b:v 0 -multipass:v 2 -rc-
 lookahead:v 30 -lookahead_level:v 15 -split_encode_mode:v 1 -cq:v 30 -c:a
 copy -c:s copy -c:d copy debug.mkv
 }}}
 To my utter confusion, the output file still has the issue. I literally
 re-encoded it to HEVC in between, and it still has the same issue. I have
 never been this confused in my life.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11390#comment:1>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker