Intel ARC 380's are ideal at 4k realtime transcoded streams. And theyre cheap as well.

You could probably do a sticky round robin reverse proxy with a few backends doing transcode.

The biggest issue is bandwidth, but you probably knew that.

Even better is a passive cooled GPU like the Palit 3050 KalmX https://www.palit.com/palit/vgapro.php?id=5147 Too bad they are not producing them anymore

Absolutely not.

Nvidia arbitrarily locks number of encodes between 2 to 5 streams, depending if you're willing to run hacked firmware and drivers.

Multi-encoding on nvidia is a "professional card option" only.

Intel's ARC line has no such arbitrary encode/decode limit. And they are significantly cheaper as well.

https://jellyfin.org/docs/general/post-install/transcoding/h...