Is it possible to configure MP3Tag to map the
SUBTITLE field to the MP4 atom
If so, please tell me how. If not, consider this a feature request.
I'm having trouble with MP3Tag's tag mapping for the field
SUBTITLE to the MP4 atom
I recently evaluated several UPnP servers (Asset UPnP, MinimServer, ReadyMedia). They can be configured to show subtitles, but none of them has shown the subtitle fields of my M4A files (FLAC and MP3 worked, though). I then found out that according to a iTunes Q&A, the
desc atom is for video content only. I've read about a MP4 tag field
----:com.apple.iTunes:SUBTITLE on Hydrogenaudio and found out that is's used by some products (e.g. Picard, EZ CD AudioConverter, JAudiotagger, taglib-sharp).
I tried to override the tag mapping for my M4A files in Mp3Tag by setting a custom tag mapping of
With this, the
desc atom was no longer written (good), but the tag was not shown in UPnP servers either (bad).
I then tagged my M4A files with Picard. The subtitle was shown in the UPnP servers. Using a hex editor, I saw that the Picard-written structure is different from the MP3Tag-written structure. I suppose that I created a simple text tag field with MP3Tag, and that these iTunes tags are composed ones and have to be treated specially somehow.
My conclusion is that MP3Tag's default mapping is incompatible to the UPnP servers (at least, maybe also to other software) and that I didn't manage to change this default mapping according to my needs. Is this kind of custom mapping supported by Mp3Tag?