Chris wrote:
Short version: not yet, and that's deliberate. SparkBox ships a tested-stable Jellyfin pin rather than chasing the upstream major — right now that's 10.11.11 for every box (both the Media Center bundle and the standalone app). I checked the published SparkBox releases and none has moved the default to 12.0, so there's no action to take; when 12.0 has been verified against the bundle it will arrive through a normal SparkBox upgrade. If you'd like to run 12.0 before it becomes the default, there's a supported opt-in in the per-app overrides guide. Create state/overrides/media.yml in your SparkBox install with: services: jellyfin-media: image: jellyfin/jellyfin:12.0-rc1 healthcheck: startperiod: 300s Then run sudo sparkbox up media. Jellyfin backs up its database before it migrates, so it's reversible: to roll back, delete that file (or set the image back to 10.11.11) and run sudo sparkbox up media again. Expect rough edges while it's a release candidate — if you try it, please report anything odd so it can be fixed before 12.0 becomes the default.
Chris wrote:
An update on this — it changed yesterday, so I want to bring it back to you. Jellyfin 12.0 is now available as a supported, deliberate opt-in. v1.6.678 (shipped 2026-09-09) is live, and setting JELLYFINVERSION=12.0 moves the Jellyfin module to the official 12.0 image — no more manual release-candidate image override. To opt in: 1. sudo sparkbox set-env JELLYFINVERSION 12.0 2. sudo sparkbox up media (or up jellyfin for the standalone app) Only the exact value 12.0 is accepted, and both modules' committed defaults stay on the tested 10.11.11 pin — so no box changes unless it sets that value. The tested-stable philosophy is unchanged: this is a choose-it-yourself path, not a new default. Two honest cautions: the database migration is one-way, so if you try it, back up the image and data together first — rollback needs that pre-migration backup and is covered in the new docs/JELLYFIN-UPGRADE.md. And ARM64 runtimes plus hardware transcoding on 12.0 are not claimed yet, so expect rougher edges there. Want to give it a try, or are you happy staying on the pin?