I've recently been ripping more of my CDs and have noticed that there seems to be no command-line tool that allows for converting to id3v2.3. The only tool I've found that can actually even properly fix my tags (The tagger rip, the script I use for ripping, uses seems to only write id3v1) is mid3v2 that uses mutagen.
The only problem? Mutagen basically tells me to choke on a phallic object if I want to use any other format than v2.4. I would have no problem with that if my mp3 player just supported said format.
id3v2 -C as well, but that seems to use an 8-bit non-unicode encoding to store the tags. This is something I would rather not do. Especially since none of my other software supports tags in this format
Basically, I'm trying to solve a very specific problem that should have a trivial solution. And I'm wondering why it doesn't.
Edit: I'm actually not sure of that non-unicode encoding right now, but it seems to double-encode; I get double characters in place of "ä"s and "ö"s