This is a tool I made to make replacing audio in Cinepak files easier. It also allows you to extract audio. It's written in Java so you will need the Java Runtime Environment to run it. More info can be found in the readme as well as on github:
GitHub - TrekkiesUnite118/SegaSaturnFilmMuxer: Remuxes Sega Saturn FILM files from Audio and Video sources
Remuxes Sega Saturn FILM files from Audio and Video sources - TrekkiesUnite118/SegaSaturnFilmMuxer
github.com