LIBVA_DRIVER_NAME=iHD ffmpeg -loglevel verbose -i  test.mp4 -qsv_device /dev/dri/renderD129 -c:v h264_qsv -global_quality 18 -rdo 1 -preset:v slow -y output.mp4
ffmpeg version 6.0 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 12 (Gentoo Hardened 12.3.1_p20230526 p2)
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --docdir=/usr/share/doc/ffmpeg-6.0-r6/html --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --nm=x86_64-pc-linux-gnu-nm --strip=x86_64-pc-linux-gnu-strip --ranlib=x86_64-pc-linux-gnu-ranlib --pkg-config=x86_64-pc-linux-gnu-pkg-config --optflags='-march=native -O2 -pipe -w' --disable-static --enable-avfilter --disable-stripping --disable-optimizations --disable-libcelt --enable-nonfree --enable-version3 --disable-indev=v4l2 --disable-outdev=v4l2 --disable-indev=oss --disable-indev=jack --disable-indev=sndio --disable-outdev=oss --disable-outdev=sndio --enable-nonfree --enable-bzlib --disable-runtime-cpudetect --disable-debug --disable-gcrypt --enable-gnutls --disable-gmp --enable-gpl --disable-hardcoded-tables --enable-iconv --disable-libxml2 --disable-lzma --enable-network --disable-opencl --enable-openssl --enable-postproc --enable-libsmbclient --enable-ffplay --enable-sdl2 --enable-vaapi --enable-vdpau --enable-vulkan --enable-xlib --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-zlib --disable-libcdio --disable-libiec61883 --disable-libdc1394 --disable-libcaca --disable-openal --enable-opengl --disable-libv4l2 --disable-libpulse --disable-libdrm --disable-libjack --disable-libopencore-amrwb --disable-libopencore-amrnb --disable-libcodec2 --enable-libdav1d --enable-libfdk-aac --enable-libopenjpeg --disable-libjxl --disable-libbluray --disable-libgme --disable-libgsm --disable-libaribb24 --disable-mmal --disable-libmodplug --enable-libopus --enable-libvpl --disable-libilbc --disable-librtmp --disable-libssh --disable-libspeex --disable-libsrt --enable-librsvg --disable-ffnvcodec --enable-libvorbis --enable-libvpx --disable-libzvbi --disable-appkit --disable-libbs2b --disable-chromaprint --disable-cuda-llvm --disable-libflite --disable-frei0r --disable-libvmaf --disable-libfribidi --disable-fontconfig --disable-ladspa --enable-lcms2 --disable-libass --disable-libplacebo --disable-libtesseract --disable-lv2 --enable-libfreetype --disable-libvidstab --disable-librubberband --disable-libzmq --disable-libzimg --disable-libsoxr --enable-pthreads --disable-amf --disable-libvo-amrwbenc --disable-libkvazaar --enable-libaom --enable-libmp3lame --disable-libopenh264 --enable-librav1e --disable-libsnappy --disable-libsvtav1 --enable-libtheora --disable-libtwolame --disable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --disable-gnutls --enable-version3 --disable-armv5te --disable-armv6 --disable-armv6t2 --disable-neon --disable-vfp --disable-vfpv3 --disable-armv8 --disable-mipsdsp --disable-mipsdspr2 --disable-mipsfpu --disable-altivec --disable-vsx --disable-power8 --disable-amd3dnow --disable-amd3dnowext --disable-fma4 --disable-xop --enable-pic --cpu=host --disable-doc --disable-htmlpages --enable-manpages
  libavutil      58.  2.100 / 58.  2.100
  libavcodec     60.  3.100 / 60.  3.100
  libavformat    60.  3.100 / 60.  3.100
  libavdevice    60.  1.100 / 60.  1.100
  libavfilter     9.  3.100 /  9.  3.100
  libswscale      7.  1.100 /  7.  1.100
  libswresample   4. 10.100 /  4. 10.100
  libpostproc    57.  1.100 / 57.  1.100
[AVHWDeviceContext @ 0x559be3d16d00] libva: VA-API version 1.19.0
[AVHWDeviceContext @ 0x559be3d16d00] libva: User requested driver 'iHD'
[AVHWDeviceContext @ 0x559be3d16d00] libva: Trying to open /usr/lib64/va/drivers/iHD_drv_video.so
[AVHWDeviceContext @ 0x559be3d16d00] libva: Found init function __vaDriverInit_1_19
[AVHWDeviceContext @ 0x559be3d16d00] libva: va_openDriver() returns 0
[AVHWDeviceContext @ 0x559be3d16d00] Initialised VAAPI connection: version 1.19
[AVHWDeviceContext @ 0x559be3d16d00] VAAPI driver: Intel iHD driver for Intel(R) Gen Graphics - 23.3.2 ().
[AVHWDeviceContext @ 0x559be3d16d00] Driver not found in known nonstandard list, using standard behaviour.
[AVHWDeviceContext @ 0x559be3d16800] Use Intel(R) oneVPL to create MFX session, API version is 2.9, the required implementation version is 1.3
[AVHWDeviceContext @ 0x559be3d16800] Error adding a MFX configurationVendorID property: -9.
Device creation failed: -1313558101.
Failed to set value '/dev/dri/renderD129' for option 'qsv_device': Unknown error occurred