I have a ~10,000 library of album art-embedded MP3s, but unfortunately my music player cannot detect the album art because it is in progressive format. All other metadata are properly detected.
Does MP3Tag have a batch edit for changing album art from progressive to baseline type?
Use an action of the type "Export cover to file" to export.
Enter a useful format string like
Format String: %album%_%title%_%cover_type%
Execute the action.
Do the conversion.
See the help on the next action type:
Create an action of the type "Import cover from file"
Format string: %album%_%title%_%cover_type%.jpg
Tick "Remove existing covers"
Execute the action.
This should be it.