On 11/22/24 18:41, Andrew Randrianasulu wrote:
On Fri, Nov 22, 2024 at 2:52 PM Terje Hanssen <terjejhanssen@gmail.com> wrote:




On 11/22/24 08:45, Andrew Randrianasulu wrote:



---------- Forwarded message ---------
От: Wang, Fei W <fei.w.wang-at-intel.com@ffmpeg.org>
Date: пт, 22 нояб. 2024 г., 09:10
Subject: Re: [FFmpeg-devel] qsvenc.c & AV_CODEC_FLAG_INTERLACED_DCT
To: ffmpeg-devel@ffmpeg.org <ffmpeg-devel@ffmpeg.org>


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.


We can dual check to transcode hdv to av1_qsv again, as I did with ffmpeg in this post
https://www.mail-archive.com/cin@lists.cinelerra-gg.org/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/cin@lists.cinelerra-gg.org/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 !?


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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