thx !
it works without the spaces.
i left all tag names in the blacklist.
now picard behaves as: update empty tags, but not overwrite any. thats ok!
but, the function cant be set for the covers? does it update all covers, no matter if they already exist (higher resolution existing covers updated by lower res?)? is it “apic” tag name, as mentioned in : Re-tag without losing current cover art? ?
also i dont quite get it, it seems that for some mp3 's if rescanned, picard suggests another cover image every scan…
still, an option to choose to only update specific empty tags would be nicer.
to your question:
no, for the moment i am doing acrcloud music recognition and fetching music info online according to the result. it is also possible to get the track played i.e. by clementine via dbus and with that info i display infos available.