Deinterlace like MPV but via FFmpeg

[mark-filipak]

I've searched the net but not github -- search here doesn't seem to work sensibly. MPV's deinterlace (bobbing NTSC) is stunning, very smooth. I've tried to duplicate it with FFmpeg via 'yadif' and 'bwdif', with and without 'dejudder', but without success. How's MPV rendering such a judder-free credit-crawl? Has anyone duplicated it via FFmpeg?

[kasper93]

How's MPV rendering such a judder-free credit-crawl?

It's impossible to answer without a log. mpv can deinterlace using your GPU driver implementation, or a filter in ffmpeg. With log we can tell you which one you are using.

[mark-filipak]

I have no GPU.

I got logging to work. Will I need an isolated, 30000/1001 FPS credit crawl?

[kasper93]

Not really, just a log when you play a file is fine, to see what platform and api you are using.

[mark-filipak]

The log is 772 lines. Platform is Win7.
[ 0.004][v][cplayer] Configuration: -Ddebug=true -Db_ndebug=true -Doptimization=3 -Db_lto=true -Db_lto_mode=thin -Dlibmpv=true -Dpdf-build=enabled -Dlua=enabled -Djavascript=enabled -Dsdl2=enabled -Dlibarchive=enabled -Dlibbluray=enabled -Ddvdnav=enabled -Duchardet=enabled -Drubberband=enabled -Dlcms2=enabled -Dopenal=enabled -Dspirv-cross=enabled -Dvulkan=enabled -Dvapoursynth=enabled -Degl-angle=enabled -Dprefix=/__w/mpv-winbuild-cmake/mpv-winbuild-cmake/build_x86_64/x86_64-w64-mingw32 -Dlibdir=/__w/mpv-winbuild-cmake/mpv-winbuild-cmake/build_x86_64/x86_64-w64-mingw32/lib -Ddefault_library=shared -Dprefer_static=True --cross-file=/__w/mpv-winbuild-cmake/mpv-winbuild-cmake/build_x86_64/meson_cross.txt
[ 0.004][v][cplayer] List of enabled features: av-channel-layout avif-muxer build-date cplugins cuda-hwaccel cuda-interop d3d-hwaccel d3d11 d3d9-hwaccel debug direct3d dos-paths dvdnav egl-angle egl-angle-win32 egl-helpers ffmpeg ffnvcodec gl gl-dxinterop gl-dxinterop-d3d9 gl-win32 glob glob-win32 gpl iconv javascript jpeg jpegxl lavu-uuid lcms2 libarchive libass libavdevice libbluray libm libplacebo luajit manpage-build noexecstack openal pdf-build rubberband rubberband-3 sdl2 sdl2-audio sdl2-gamepad sdl2-video shaderc spirv-cross threads uchardet vaapi vaapi-win32 vapoursynth vector vulkan vulkan-interop wasapi win32 win32-desktop win32-executable win32-threads zimg zimg-st428 zlib
[ 0.004][v][cplayer] Built with NDEBUG.
[ 0.004][v][cplayer] Command line options: '--player-operation-mode=pseudo-gui' '%1' '--log-file=c:\work\mpv.log' 'F:\Documentaries2\mkv\FROM THE EARTH TO THE MOON [1998]12+10+11.mkv'
[ 0.004][v][cplayer] mpv v0.37.0-271-gf5c4f0b0 Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
[ 0.004][v][cplayer] built on Feb 11 2024 00:11:11
[ 0.004][v][cplayer] libplacebo version: v6.338.0-77-g3ba18d5-dirty
[ 0.004][v][cplayer] FFmpeg version: N-113608-gafb630ce4
[ 0.004][v][cplayer] FFmpeg library versions:
[ 0.004][v][cplayer] libavutil 58.36.101
[ 0.004][v][cplayer] libavcodec 60.39.100
[ 0.004][v][cplayer] libavformat 60.20.100
[ 0.004][v][cplayer] libswscale 7.6.100
[ 0.004][v][cplayer] libavfilter 9.17.100
[ 0.004][v][cplayer] libswresample 4.13.100

[kasper93]

If it uses d3d11vpp for deinterlacing it will be simple BOB with this version. If it uses ffmpeg, it will be bwdif or yadif, I don't remember if it changed in that time frame. It did at some point.

[mark-filipak]

Thank you, Kacper,
Well, I don't think my FFmpeg has 'd3d11vpp.' And I've tried 'yadif' & 'bwdif', both with and without 'dejudder'. The FFmepg fields look fine, but there's judder, so it's a frame rate issue -- that's why I tried 'dejudder', to make the PTSes uniform. ...So, no help, eh? -- Mark Filipak (AKA Marek Filipiak).