I just wanted to enquire about the values mp3tag writes for the iTunesMediaType field. Phil Harvey (creator of exiftool) and I were discussing the problem in some mappings of values last night on exiftool's behalf and I just wanted to clarify a couple of things with you.
The thread can be found here, hopefully it's easy to follow: http://u88.n24.queensu.ca/exiftool/forum/index.php/topic,9059.0.html
mp3tag writes a value of 0 when "Short Film" is entered to the iTunesMediaType tag but then loads a value of "Unknown" when it is re-opened. We had found out that the value of short film is no longer used and a value of 0 is unused. I was wondering if it would be possible to update the mp3tag mappings to reflect this change and an update to the documentation to remove the short film value.
As Phil and I also discussed, mp3tag writes a value of 23 for the type "iTunes U" and we were wondering if this was a sole mp3tag implementation or you were referencing some documentation somewhere?
In the thread we have listed a group of tags along with their values that we believe should be used unless, as I said, you indeed know of or are able to find the documentation for these tags elsewhere.
Look forwarding to hearing from you regarding this