Please support ffv1 in mp4 containers

[Jeremiah Paul Wilson]

Summary of the bug: FFV1 is now officially recognized by the MP4 Registration Authority ( ​http://mp4ra.org/#/codecs , codec FFV1 ), so it would be wonderful if ffmpeg could support the ffv1 codec in an mp4 container.
How to reproduce:

% ffmpeg -threads 16 -i input.mkv -v debug -c:v ffv1 -level 3 -g 1 -pix_fmt gbrp10le -threads 16 -coder -2 -context 0 -slices 30 -slicecrc 1 -c:a copy output.mp4
ffmpeg version N-108650-ga010193fcb Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 12.2.0 (GCC)
configuration: --prefix=/usr --disable-static --disable-stripping --enable-amf --enable-avisynth --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librav1e --enable-librsvg --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-libzimg --enable-nvdec --enable-nvenc --enable-opencl --enable-opengl --enable-shared --enable-version3 --enable-vulkan --enable-alsa --enable-bzlib --enable-iconv --enable-libxcb-shm --enable-libxcb-xfixes --enable-libxcb-shape --enable-lzma --enable-sdl2 --enable-xlib --enable-zlib --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-v4l2-m2m --enable-vaapi --enable-vdpau --enable-librist --enable-lto --enable-libmfx --enable-libsvtav1 --enable-libvmaf --enable-cuda-llvm --disable-cuvid --disable-debug --disable-sndio
libavutil      57. 39.101 / 57. 39.101
libavcodec     59. 50.100 / 59. 50.100
libavformat    59. 34.101 / 59. 34.101
libavdevice    59.  8.101 / 59.  8.101
libavfilter     8. 49.101 /  8. 49.101
libswscale      6.  8.112 /  6.  8.112
libswresample   4.  9.100 /  4.  9.100
libpostproc    56.  7.100 / 56.  7.100

Patches should be submitted to the ffmpeg-devel mailing list and not this bug tracker.

[Jeremiah Paul Wilson]

ffmpeg console output

[Michael Niedermayer]

Fixed in 0b8c9cf5b490a0231949ab3c6d797462ae001730