Feature request: optional "Maximum audio channels" setting

[Klumni932]

Litefin appears to always report 6 audio channels in its codec profile, so Jellyfin's server-side "Stereo Downmix Algorithm" setting can never take effect. Even with force transcode enabled, the server generates:

-codec:a:0 libfdk_aac -ac 6 -ab 640000

This is correct behaviour for my hardware, my LG C2 does support multichannel. But I would like to be able to opt in to a server-side stereo downmix, which is currently unreachable from Litefin.

Request: a user-selectable "Maximum audio channels" option in the playback settings (e.g. Auto / 7.1 / 5.1 / 2.0), applied to the codec profile. When set to 2.0, the server would produce -ac 2 plus the configured downmix filter. Ideally video would stay Direct Stream and only audio gets transcoded.

jellyfin-roku implemented exactly this in jellyfin/jellyfin-roku#562 (merged Nov 2025).

Btw: great project! It fixed a lot of problems for me, thank you for that.

[MoazSalem]

@Klumni932 will look into it