Cannot open MP4s to change tag data

[ohrenkino]

@JAMotter

Does anyone have any suggestions?

I found this thread:

Tags not saved in mp4 files

I'm trying to add titles, album, artist tags to a set of mp4 files. No error shows up when I tell it to save the tags, but the files do not have any tags in them. As a result this software seems totally useless. What am I doing wrong? I've tried several versions of mp3tag including 2.53 with no change in behavior. I don't see any way to make it work and there is no documentation pointing me to what I'm doing wrong.