Okay, I suppose people are aware thatMP3Tag and Softpointer Audioshell both permit one to embed a jpg, but neither will detect what the other did. So, is it a waste of effort to attempt it with either?
Florian's Mp3tag (http://www.mp3tag.de/en/) does not allow adding cover art to Vorbis comments (yet?). Perhaps you mean some other program with "MP3Tag".
IIRC Ogg Vorbis spec does not explicitly support coverart embedding in the .ogg file.That said, if you really want to embed a coverart, you can embed a Base64-encoded file into your own custom tag.
I think that's because the Ogg spec implictly supports cover-art embedding, because you can mux any file in an .ogg file.
I did mean Florian's project: I right-click on the CD pic at lower left, select image, and write tag to file. When one views the files in MP3Tag, the cover is displayed. This was with development builds e and f of this month.