Is 10.8.11 still the best version for Synology NAS?

[TheDreadPirate]

The issue they mention is tone mapping. Not transcoding, in general. If you have no HDR content, or if your clients can direct play your HDR content, there is no concern with upgrading.

But plain SDR transcoding is still supported on the latest versions.

The reason Container Manager isn't saying there is an update is because you specified a version, 10.8.11. It will never prompt you to upgrade, or that there is even an upgrade available. Since Jellyfin doesn't phone home, you will not receive a prompt in that respect either.

If you changed "jellyfin/jellyfin:10.8.11" to "jellyfin/jellyfin:latest", Container Manager will periodically check for new images and pull them. But only when you restart the container.

We always recommend you backup your Jellyfin data. Wherever you mounted /config, make a copy of that folder before upgrading.

Because this is such a large version jump, it will take several minutes for Jellyfin to start up since it has to apply a boat load of database updates. Make sure you don't have any watchdogs that would kill the Jellyfin container if it takes too long to start up.

Be patient during that first startup.