The most important feature of this release is the CLI. Its usage is very simple:
mtag --get -f myfile.mp3
mtag --set --artist --value "My Favorite" -f myfile.mp3
But also now libmtag has one feature that taglib doesn’t have: file type identification. Currently taglib relies on the file name extension to guess the file type, and usually that’s enough, but not always.
So there’s a new function, mtag_file_get_type, which basically returns the mime type (audio/mpeg, audio/x-vorbis, audio/x-flac, etc.)
Grab it from here.