

Hey. I realise my comment may have come off as rude and made me sound like an asshole. It was not my intention to be disrespectful, apologies for that. The reason I posted that is because I read your post (thanks for taking the time to write and share it) and it left me a bit puzzled. I respect wanting something stable, familiar and that requires minimal maintenance, but you seemed to imply this is not possible with a more “traditional” NAS setup. Many of the points you raised about wanting an applliance-like experience are equally achievable on most Linux distros, with no license fees, and with a lot more flexibility, should you need it in the future (although I understand you don’t need or want it).
Take Debian for example (a.k.a. the world’s most boring distro, in a good sense). With the knowledge you demonstrated about the underlying services involved (BTRFS, Wireguard, etc), it would have taken you no more time to configure the same set of services on a minimal Debian install, it would also run rock-solid for many years, and updates would be entirely at your discretion (as they are with RouterOS). Plus, your pockets would be 50 EUR heavier. But for me, personally, by far the biggest avantage of going with Linux for a data storage solution like this is the possiblity of using ZFS.
Also, have this Debian meme:

I had the same problem: Debian host + official Jellyfin Docker image, all set up according to the official guide, but it would fail to transcode anything.
There was no relevant information about what was wrong in the logs so what I did was:
docker exec -itinto the Jellyfin container.Long story short, because the Nvidia toolkit uses the driver/libraries from the host, the error was that I was missing the library
libnvidia-encode1on the host. After installing that, everything works as it should.