I don't know whether this counts as bug or feature request, as it is related to device compatibility (or DLNA compatibility). So please move/delete it, if it doesn't match.
My media server (AVM Fritz!Media 8260) requires in the protocolInfo-Parameter of the <res> tag not only the MIME type in the third block, but also the media format defined by DLNA.ORG_PN in the fourth block. This seems to be compliant to the DLNA specification, which requires the DLNA.ORG_PN parameter to be always present.
E.g. MediaTomb serves with --enable-protocolinfo-extension this:
while other server provide
There is already a partial support for this parameter in cds_resource_manager.cc for MP3, PCM, and JPG files. Can this support also added for all other files?