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Jellyfin on Synology NAS without Docker
(lemmy.ca)
Current stable release: 10.10.0
Matrix (General Information & Help)
Matrix (Off-Topic) - Come get to know the team and blow off steam!
Matrix Space - List of all the available rooms on Matrix.
Discord - Bridged to our Matrix rooms
You could add the Synocommunity as a package source, instructions here and then install Jellyfin from their repository in the Package Center. Jellyfin is available on their repository.
A disadvantage of this is that you're dependent on the maintainer of the package on the Synocommunity and it could take a while for new versions to be uploaded to their repository. If you use Docker, then you can basically get new versions immediately.
I used this version of Jellyfin for a long time and had no significant issues. The maintainer usually had new versions available within a week.