Hello, this quick tutorial is to introduce an experimental Debian and Ubuntu APT repository to install ffmpeg and mpv compiled with v4l2request and v4l2drmprime patches developed by Linux kernel, LIbreELEC and Kodi folks to allow hardware video decoding on stateless decoders like those implemented in Rockchip and Allwinner SoCs for h.264, h.265, vp8 and vp9 codecs.   The repository introduces a new package ffmpeg-v4l2request that integrates and substitues the base ffmpeg package and it