Modification of tags for mp4 and case conversion

[ohrenkino]

Here are the FAQS about how to create a new action - and the first example is about case conversion:

Actions and batch-operations

Mp3tag provides a variety of actions, which can be applied to filenames and tags. The actions are grouped together into named sets (action groups), which can be applied independently via Alt + 6. If you do not want to create a reusable action group for applying one single action, the Actions (Quick) toolbar button or keyboard shortcut Shift + Alt + 6 can be used. How to create a new action? How to ... change upper/lower case of tag fields or filenames? replace the string “xyz” in tag-fields …