Discsubtitle handling

[simoncn]

What is the other solution that you mentioned in your post?

The UPnP specification defines how the server sends artwork to the control point and the various tagging formats define how artwork can be embedded in an audio file. There is no standard specification for how artwork is associated with albums, discs, tracks and index entries for Genre, Artist, etc., so each media server has its own rules for this.

The rules used by MinimServer have been refined over many years with feedback from users to arrive at the current set of rules which seem to be working well. I am reluctant to make any change to these rules that would produce different results with the tagging and embedding schemes of current users. Maintaining upward compatibilty for users when new versions and updates are released has always been an important principle for MinimServer development.

What exactly do you mean by FRONT and DISC? Is FRONT the ID3v2 APIC picture type (front cover = 3, etc.) or is it the value of the APIC description string? There is no APIC picture type for DISC, so I presume this would be a description string. Please clarify. Also, how would FRONT and DISC be encoded in the COVR atom in an Apple MP4/M4A file?

Regarding your suggestion for search results, the semantics of UPnP Search are clearly laid down in the UPnP specification and MinimServer implements this specification as closely as possible. UPnP doesn't have a concept of Disc (an unfortunate omission), so there is no standard mechanism for a UPnP server to return a DiscSubtitle value and the MinimServer implementation has no easy way to add this capability. Also, I don't quite understand your scenario with The Beatles in Mono and Please Please Me. What UPnP Search query would you like to return a different result in this case?

Some time ago the concept of album groups was discussed (see this post). This might be a better way to handle The Beatles in Mono (tagged as an album group) and Please Please Me (tagged as an album). Would adding this feature provide a solution for your request?