Additional Album art using embedded album art (or all in the folder)

[simoncn]

MinimServer is a UPnP server, so it uses the UPnP protocol to send images to the control point (not the renderer). Each image must be associated with a library item (audio file, album, artist, etc.) The UPnP protocol doesn't allow sending mutiple different images for the same library item. Roon uses its own proprietary protocol, so it can do things that aren't supported by UPnP.

The UPnP protocol does support libraries containing images (photos) and videos but this is different from associating images with audio files and isn't supported by MinimServer.