I want to convert a bunch of FLAC files to OPUS, keeping the folder structure and all metadata (including the cover art). Does anyone know the best way to do that? All the finished scripts I found don't fulfill all of those requirements.

Needs to be something for Linux
@LilaHexe does it also need to be ready made? i would write a short shell script that traverses every directory, converts the file w/ ffmpeg and on exit code 0 deletes the source file