Topic: Hardware transcoding using VAAPI

Im trying to trasncode using VAAPI on Ubuntu 20.04 however i got this error:

23:05:53.292: ===== Starting mpv ======
23:05:53.292: Command line: /usr/bin/mpv /home/cybereu/1.mp4 --o=/home/cybereu/1.SVP.temporary.mkv --no-audio --no-sub --no-sub-auto --input-ipc-server=/tmp/mpvencodesocket --input-media-keys=no --no-msg-color --vf=vapoursynth:/home/cybereu/.local/share/SVP4/scripts/ffff.py:4:12 --of=matroska --ovc=h264_vaapi --ovcopts=b=35010130,threads=12
23:05:53.316: Warning: option --o is deprecated and might be removed in the future (lack of maintainer).
23:05:53.373: (+) Video --vid=1 (*) (h264 1920x1080 23.976fps)
23:05:53.373: Audio --aid=1 --alang=eng (*) (aac 2ch 44100Hz)
23:05:53.509: [hwupload] no hw context
23:05:53.509: [hwupload] hardware format not supported
23:05:53.509: [autoconvert] can't find video conversion for yuv420p
23:05:53.509: Cannot convert decoder/filter output to any format supported by the output.
23:05:53.518: Could not initialize video chain.
23:05:53.607: [vo/lavc] error encoding at EOF
23:05:53.607: Video: no video
23:05:53.607: [encode] no data written to target file
23:05:53.607: Exiting... (Interrupted by error)
23:05:53.620: (!!!) Intermediate file may be broken: /home/cybereu/1.SVP.temporary.mkv
23:05:53.620: ===== mpv exited with code 2 =====

Re: Hardware transcoding using VAAPI

can't tell anything except vaapi probably depends on a video drivers