[FFmpeg-trac] #9717(undetermined:new): dxva qsv deinterlace has unexpected results

[FFmpeg]

#9717: dxva qsv deinterlace has unexpected results
-------------------------------------+-------------------------------------
             Reporter:  s170361683   |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  qsv dxva     |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 I'm getting amazing results with FFmpeg and DXVA, except for
 deinterlacing.

 I've plenty of interlaced '''50i''' samples that I would like to convert
 to a silky smooth '''50p''' but all I am getting is jerky '''25p'''
 deinterlacing

 This happens when I specify '''deinterlace=bob''' or
 '''deinterlace=advanced''' in vpp_qsv filter:

 {{{
 -vf hwmap=derive_device=qsv,vpp_qsv=async_depth=4:deinterlace=advanced
 }}}


 full command:
 {{{
 ffmpeg.exe -r 25 ^
     -init_hw_device qsv=hw,child_device_type=dxva2 ^
     -filter_hw_device hw ^
     -extra_hw_frames 32 ^
     -hwaccel dxva2 ^
     -hwaccel_output_format dxva2_vld ^
     -threads 1 ^
     -i "interlaced_input.ts" ^
     -c:v h264_qsv -q:v 25 -preset slower ^
     -vf hwmap=derive_device=qsv,vpp_qsv=async_depth=4:deinterlace=advanced
 ^
     -y "output.mp4"
 }}}

 Media Player Classic deinterlace it smoothly to '''50p'''.

 If I use yadif's bob, '''yadif=1''', I get the desired result; a smooth
 '''50p'''
 {{{
 -vf hwmap=derive_device=qsv,hwdownload,format=nv12,yadif=1
 }}}

 This is why I feel that this is actually a bug


 FFmpeg official build:
 {{{
 configuration: --enable-gpl --enable-version3 --enable-static --disable-
 w32threads --disable-autodetect --enable-fontconfig --enable-iconv
 --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-zlib
 --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth
 --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-
 libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-
 libass --enable-libfreetype --enable-libfribidi --enable-libvidstab
 --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm
 --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-
 d3d11va --enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt
 --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora
 --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb
 --enable-libopus --enable-libspeex --enable-libvorbis --enable-
 librubberband
 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9717>
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