Can anything be compiled additionally in the FFMpeg library?

[niels]

Those mappings are for the new playback code which is only in use by the audio player. They are also extremely new, the commented out lines are the ones I did not easily find a mime type for right away. More information on the playback rewrite can be found in the GitHub issue https://github.com/jellyfin/jellyfin-and...ssues/1057