I frequently get mp4 files from friends who strictly use MAC/iTunes.
I've read here that Mp3tag will not write leading zeros in Mp4 tags because the format does not support them. I also read that a custom "track" field was added at some point to accommodate this but then removed because iTunes choked on it.
I am curious then, as to why I have some Mp4 files that HAVE leading zeros in the track numbers and other don't. The ones that do can be written/converted back and forth and they retain the leading zeros, but there are some which will not, even though Mp3tag does not indicate there was a problem writing the data. The only difference I can see between the files is either the encoder or the version of iTunes listed, but even that is not consistent. The tag field ONLY shows "MP4 (MP4)" in both cases.
I have tried deleting the tags completely. Doesn't matter. The ones that can have leading zeros still can and the ones that can't still can't. Can someone explain why this is or if there is a work-around? Would it be possible to give the option of using the custom "track" field or not with a check box?
Few more questions:
Can an ID3v2 tag be written to an Mp4 file?
Will there be any support for other file types (.wav .aif, etc.)?
I am able to write tags to these file types in Tag&Rename, and they read fine in other apps, but I have no idea how that application is doing it.
Will Mp4 be added to the options dialog so it can be checked unchecked for reading/writing?
Thank you for your time. This is a wonderful program that I've only recently discovered and it's already saved me a lot of headache getting things in order!