On 11/22/24 18:54, Andrew Randrianasulu wrote:


пт, 22 нояб. 2024 г., 20:37 Terje Hanssen <[email protected]>:




    On 11/22/24 18:12, Andrew Randrianasulu wrote:


    пт, 22 нояб. 2024 г., 20:07 Terje Hanssen <[email protected]>:




        On 11/22/24 17:58, Andrew Randrianasulu wrote:


        пт, 22 нояб. 2024 г., 19:55 Terje Hanssen
        <[email protected]>:




            On 11/22/24 18:41, Andrew Randrianasulu wrote:
            On Fri, Nov 22, 2024 at 2:52 PM Terje Hanssen<[email protected]> 
<mailto:[email protected]> wrote:
            On 11/22/24 08:45, Andrew Randrianasulu wrote:



            ---------- Forwarded message ---------
            От: Wang, Fei W<[email protected]> 
<mailto:[email protected]>
            Date: пт, 22 нояб. 2024 г., 09:10
            Subject: Re: [FFmpeg-devel] qsvenc.c & AV_CODEC_FLAG_INTERLACED_DCT
            To:[email protected] <[email protected]> 
<mailto:[email protected]>


            On Thu, 2024-11-21 at 11:50 +0300, Andrew Randrianasulu wrote:
            Hello.


            Recently I teached cinelerra-gg to use qsv encoders in ffmpeg
            (libavcodec)
            and some test were working but some not.

            We nailed it down to top-field first  material, like HDV files. bff
            files
            like consumer version of DV and progressive worked fine.

            I looked at source and ... I thought condition at

            
http://git.ffmpeg.org/gitweb/ffmpeg.git/blob/HEAD:/libavcodec/qsvenc.c#l852


            must contain case for bff, but I tried this and it was reportedly 
not
            helping?


            We currently set flags = ildct+ilme on interlaced streams, I hope to
            avoid
            special-casing qsv encoders, but may be we have no other choice?

            I asked user (Terje) to add +ildct flag to his normal system ffmpeg
            line
            and it started to fail too:

            
https://lists.cinelerra-gg.org/pipermail/cin/2024-November/009123.html
            AV1 doesn't support interlaced frame.


I wonder if AV1 generic doesn't support interlaced input video, then neither AV1 software encoders like av1_svt should be able to do it. Or may this mean interlaced output?

            We can dual check to transcode hdv to av1_qsv again, as I did with 
ffmpeg in this post
            
https://www.mail-archive.com/[email protected]/msg08314.html

            My issue now currently on Kaby Lake is that I have no hdv.m2t file 
stored and could not find a download link with example hdv. Suggestion?

            https://archive.org/download/hdv01

            Thanks, I downloaded FX1_01.mpg, which even its wrong
            file extension is a 1080i50 HDV recorded on a
            predecessor of my own Sony FX7-E camcorder.)

            mediainfo FX1_01.mpg | egrep -i
            "scan|bit|format|FileExtension"
            Format                                   : MPEG-TS
            Overall bit rate mode                    : Variable
            Overall bit rate                         : 26.1 Mb/s
            Maximum Overall bit rate                 : 33.0 Mb/s
            FileExtension_Invalid                    : ts m2t m2s
            m4t m4s tmf ts tp trp ty
            Format                                   : MPEG Video
            Format version : Version 2
            Format profile : Main@High 1440
            Format settings : CustomMatrix / BVOP
            Format settings, BVOP                    : Yes
            Format settings, Matrix                  : Custom
            Format settings, GOP                     : M=3, N=12
            Format settings, picture structure       : Frame
            Bit rate mode : Constant
            Bit rate : 24.5 Mb/s
            Maximum bit rate                         : 25.0 Mb/s
            Bit depth : 8 bits
            Scan type : Interlaced
            Scan order : Top Field First
            Bits/(Pixel*Frame)                       : 0.629
            Format                                   : MPEG Audio
            Format version : Version 1
            Format profile : Layer 2
            Bit rate mode : Constant
            Bit rate : 384 kb/s
            Format                                   : MPEG Video /
            MPEG Audio /  /


            But unhappily, the HDV --> av1_qsv transcoding I
            previous did on i17-12700/DG2 WS
            
https://www.mail-archive.com/[email protected]/msg08314.html

                HDV --> av1_qsv -global_quality 25
                -----------------------------------
                ffmpeg -hide_banner -qsv_device /dev/dri/renderD128
                -i hdv09_04.m2t -pix_fmt nv12 -c:v av1_qsv
                -global_quality 25 hdv09_04_av1_qsv_format_nv12_gq25.mp4

                ffprobe -hide_banner
                hdv09_04_av1_qsv_format_nv12_gq25.mp4
                  Stream #0:0[0x1](und): Video: av1 (libdav1d)
                (Main) (av01 / 0x31307661), yuv420p(tv, bt709, top
                coded first (swapped)), 1440x1080, 7902 kb/s, SAR
                4:3 DAR 16:9, 24.99 fps, 25 tbr, 12800 tbn (default)

            is not possible on my legacy KBL i7-8550U Intel UHD
            Graphics 620

            [av1_qsv @ 0x5641dd0f5440] This version of runtime
            doesn't support AV1 encoding

            as confirmed by these limited capabilites

            vainfo | grep -i enc
            libva info: VA-API version 1.22.0
            libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
            libva info: Found init function __vaDriverInit_1_22
            libva info: va_openDriver() returns 0
            VAProfileMPEG2Simple :    VAEntrypointEncSlice
            VAProfileMPEG2Main :    VAEntrypointEncSlice
            VAProfileH264Main :    VAEntrypointEncSlice
            VAProfileH264Main :    VAEntrypointEncSliceLP
            VAProfileH264High :    VAEntrypointEncSlice
            VAProfileH264High :    VAEntrypointEncSliceLP
            VAProfileJPEGBaseline :    VAEntrypointEncPicture
            VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice
            VAProfileH264ConstrainedBaseline: VAEntrypointEncSliceLP
            VAProfileVP8Version0_3 :    VAEntrypointEncSlice
            VAProfileHEVCMain :    VAEntrypointEncSlice
            VAProfileHEVCMain10 :    VAEntrypointEncSlice

            By the way, neither this attempt claims about
            unsupported or wrong image structure format !?



        may be it not even come to this line and abort earlier? (in
        compiled languages functions can be executed out of order
        they appear in file)

        HDV --> av1_qsv transcoded as referenced above on the newer
        i17-12700/DG2


    ??

    you mean why default ffmpeg does not trip over this line?

    it silently ignores interlace and makes something flagged as
    interlaced but actually not?

    We can have a closer look at the av1_qsv output, possibly with
    loglevel verbose or debug on that WS, when I'm back again. I don't
    know what ffmpeg really does here, but as far it is accelerated
    (fps=561 for cfhd.mkv), viewable and playable, it will be good?



welll ..may be?

If it works good enough for  those goals may be you can just set cingg's  format to progressive even if autodetect says interlaced, and try to render.

I'll try that also.




















            You may add deinterlace filter
            before encoder after apply this patch:
            https://patchwork.ffmpeg.org/project/ffmpeg/list/?series=13372

            cmd:
            ffmpeg -hide_banner -qsv_device /dev/dri/renderD128 -
            hwaccel_output_format qsv -i input.mp4 -pix_fmt nv12 -vf
            vpp_qsv=deinterlace=advanced -c:v av1_qsv -f null -

            Thanks
            Fei

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