My question is not related to post-processing or color-space transformation. It is about how to hardware encode using a pixel format that provides high color accuracy for screen capture, differently from what NV12 is capable of offering.
Regarding hardware encoding support, accordingly to this: https://github.com/intel/media-driver/blob/master/README.md Hardware support has been added since Ice Lake (2019, 10th generation) to HEVC and VP9 codecs for 4:4:4 chroma for both 8 and 10 bits modes and also for both encoding and decoding. This other page gives more details: https://github.com/intel/media-driver/blob/master/README.md Accordingly to the above link , the following 4:4:4 formats are supported for hardware decoding when using HEVC or VP9: AYUV (8 bits) and Y410 (10 bits) and the following 4:4:4 formats are supported for hardware encoding when using HEVC or VP9: AYUV and RGB (8 bits) and Y410 (10 bits). I've found out that gstreamer in my system (ubuntu version 1.20.1) is able to perform 4:4:4 10 bits encoding when using the Y410 format and the following command (ffprobe for the generated file reports pixel format as yuv444p10le): ==== gst-launch-1.0 ximagesrc display-name=:0.0 show-pointer=false use-damage=false num-buffers=2400 ! video/x-raw,framerate=20/1 ! videoconvert ! video/x-raw,format=RGBx ! vaapipostproc ! video/x-raw,format=Y410 ! vaapih265enc rate-control=cqp quality-level=1 quality-factor=18 ! video/x-h265 ! h265parse ! matroskamux ! filesink location=desktop.mkv ==== and hardware decoding of the above generated file can be achieved with the following command: ==== gst-play-1.0 desktop.mkv ==== Unfortunately, gstreamer version I have has no support for the AYUV pixel format with hardware acceleration, therefore I could not test 8 bits hardware encoding and decoding, but at least for 10 bits it is working properly and colors looks just great. =========================== I believe it would be great to add support in ffmpeg for hardware encoding and decoding for at least the following 4:4:4 pixel formats: AYUV, RGB and Y410 as this is available in Intel hardware since 2019. On Sat, 10 Dec 2022 at 17:00, Carl Eugen Hoyos <ceffm...@gmail.com> wrote: > I wanted to write "no hardware encoders support full chroma" and > "no hardware encoders support RGB" - Wenbin's answer seems > to indicate that I was wrong but in any case the qsv code in FFmpeg > currently neither allows full-chroma encoding nor RGB encoding. > > I don't know if mxf (the library used for qsv encoding) support > full-chroma and RGB. > > No idea how your question could be related to post-processing > or colour-space transformation. _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".