Mtag is a utility tool that tags mpeg-4 based media files.
Any format that uses mpeg-4 would work, but i tested it with m4b and m4a files and it works.
This tool is written in rust, so get a rust toolchain on your system and you're good.
You have two options:
With this method, you'll also have auto generated shell completions after you build the crate.
The generated shell completions will be in the target
directory.
sh
git clone https://github.com/insomnimus/mtag
cd mtag
git checkout main
cargo install --path .
cargo install mtag