[Cin] FFmpeg supported QSV pixel formats and profiles

[Terje J. Hanssen]

Den 26.10.2024 02:12, skrev Andrew Randrianasulu:
>
>
> сб, 26 окт. 2024 г., 03:06 Terje J. Hanssen via Cin 
> <cin at lists.cinelerra-gg.org>:
>
>       An overview over the system FFmpeg 7.1 supported QSV pixel
>     formats and profiles:
>
>
>     ffmpeg -hide_banner -encoders | grep qsv
>      V..... av1_qsv              AV1 (Intel Quick Sync Video
>     acceleration) (codec av1)
>      V..... h264_qsv             H.264 / AVC / MPEG-4 AVC / MPEG-4
>     part 10 (Intel Quick Sync Video acceleration) (codec h264)
>      V..... hevc_qsv             HEVC (Intel Quick Sync Video
>     acceleration) (codec hevc)
>      V..... mjpeg_qsv            MJPEG (Intel Quick Sync Video
>     acceleration) (codec mjpeg)
>      V..... mpeg2_qsv            MPEG-2 video (Intel Quick Sync Video
>     acceleration) (codec mpeg2video)
>      V..... vp9_qsv              VP9 video (Intel Quick Sync Video
>     acceleration) (codec vp9)
>
>
>     ffmpeg -hide_banner -h encoder=av1_qsv | egrep
>     'Supported|profile|main|high|professional'
>         Supported hardware devices: qsv qsv qsv
>         Supported pixel formats: nv12 p010le qsv
>       -profile           <int>        E..V....... (from 0 to INT_MAX)
>     (default unknown)
>          main            1            E..V.......
>
>
>     ffmpeg -hide_banner -h encoder=hevc_qsv | egrep
>     'Supported|profile|main|high|professional'
>         Supported hardware devices: qsv qsv qsv
>         Supported pixel formats: nv12 p010le p012le yuyv422 y210le qsv
>     bgra x2rgb10le vuyx xv30le
>       -profile           <int>        E..V....... (from 0 to INT_MAX)
>     (default unknown)
>          main            1            E..V.......
>          main10          2            E..V.......
>          mainsp          3            E..V.......
>       -tier              <int>        E..V....... Set the encoding
>     tier (only level >= 4 can support high tier) (from 0 to 256)
>     (default high)
>          main            0            E..V.......
>          high            256          E..V.......
>
>
>     ffmpeg -hide_banner -h encoder=h264_qsv | egrep
>     'Supported|profile|main|high|professional'
>         Supported hardware devices: qsv qsv qsv
>         Supported pixel formats: nv12 qsv
>       -profile           <int>        E..V....... (from 0 to INT_MAX)
>     (default unknown)
>          main            77           E..V.......
>          high            100          E..V.......
>
>
>
> from this we can conclude av1/hevc should have 10bit option  ...
>
> probably writing down numerical values for profiles (high, main...) 
> for each codec is also good idea.
>

A reference and overview table for QSV capabilties for each iGPU and 
dGPU generation is here
https://en.wikipedia.org/wiki/Intel_Quick_Sync_Video#Hardware_decoding_and_encoding

And finally, after much trying and failing, I was able to prove that 
true 10bit 422 color depth hevc_qsv encoding is possible with my system 
ffmpeg 7.1
.
While pixel format p010le results in "just" 10bit yuv420p, the clue is 
to to use either (trying this for av1_qsv, auto- switch to 8bit nv12):

    -pix_fmt y210le
    or
    -v format=yuv422p010le

Code example:

ffmpeg -hide_banner -hwaccel_output_format qsv -i cfhd01.mkv -c:v 
hevc_qsv -pix_fmt y210le cfhd01_hevc_qsv_pxfmt_y210le.mp4

Input file:

ffprobe -hide_banner cfhd01.mkv
Input #0, matroska,webm, from 'cfhd01.mkv':
   Metadata:
     ENCODER         : Lavf61.1.100
   Duration: 00:01:11.24, start: 0.000000, bitrate: 393480 kb/s
   Stream #0:0(eng): Video: cfhd (CFHD / 0x44484643), yuv422p10le(tv, 
bt709, top coded first (swapped)), 1920x1080, SAR 1:1 DAR 16:9, 25 fps, 
25 tbr, 1k tbn (default)
       Metadata:
         HANDLER_NAME    : Apple Video Media Handler
         VENDOR_ID       : appl
         ENCODER         : Lavc61.3.100 cfhd
         DURATION        : 00:01:11.240000000

Output file:

ffprobe -hide_banner cfhd01_hevc_qsv_pxfmt_y210le.mp4
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'cfhd01_hevc_qsv_pxfmt_y210le.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2mp41
     encoder         : Lavf61.7.100
   Duration: 00:01:11.24, start: 0.000000, bitrate: 31770 kb/s
   Stream #0:0[0x1](eng): Video: hevc (Rext) (hev1 / 0x31766568), 
yuv422p10le(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 31767 
kb/s, 25 fps, 25 tbr, 12800 tbn (default)
       Metadata:
         handler_name    : Apple Video Media Handler
         vendor_id       : [0][0][0][0]
         encoder         : Lavc61.19.100 hevc_qsv



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