This is built for legacy OS with brcm libraries. You should use system ffmpeg for new Raspberry Pi OS
- No GPL
- lite packages: optimized for size. only frequently used formats and codecs are enbled
- avcodec built by arm gcc cross toolchain crashes(infact is as in binutils). so clang is used
- clang packages have no libswscale because clang can not compile some swscale asm files
- appleclang packages contain libswscale
- mmal, omx enabled
Build script: https://github.com/wang-bin/avbuild