🚀 Jellyfin Server 12.0 RC1

We are pleased to announce the first release candidate preview release of Jellyfin 12.0!

This is a preview release, intended for those interested in testing 12.0 before it's final public release. We welcome testers to help find as many bugs as we can before the final release.

As always, please ensure you stop your Jellyfin server and take a full backup before upgrading!

A note about versioning

Starting with this release, we are dropping the preceeding 10. from our versioning. Thus, 10.11.x -> [10.]12.x = 12.x. The reason is simple: at this point in the project, we don't envision a hard break in the API like we planned way back in the early days, and this version scheme was causing a lot of confusion amongst users about what a "major" release was.

Thus, we are now on two digits:

The first digit is the major release. Expect signifiant changes between major releases. Do not ever auto-update to a new major release without first checking the release notes, and always take a backup of your server data and config before a major release upgrade.
The second digit is the minor release. These are primarily bug and security fix releases, and do not introduce significant feature or functionality changes. You can, usually, safely auto-update between minor releases and should not need a full backup, but it is prudent just in case. You should also ALWAYS strive to run the latest point release as security fixes are embargo'd for at most 2 weeks after the release.

What's new?

The main goal of this release has been performance. 10.11.0 dropped a major backend rewrite, and while it was broadly functional, it had a lot of rough edges. This release seeks to polish out most of those rough edges and bring better performance to all users.

There are many other small fixes, improvements, changes, and translations. See our draft release notes here or below for the full list of pull requests.

Note: You must be on Jellyfin 10.11.x (ideally, 10.11.11) before upgrading! If you are not, the upgrade will fail.
Note: The initial load of Jellyfin 12.x will run a few migrations and will take several minutes. Please be patient and do not interrupt the process.

Installing

This preview release is distributed in all our traditional forms, though not automatically via our Apt repository or latest tag.

For all non-Docker environments, you can find the files for manual download in our repository by selecting "Stable Preview" for your OS.
For Docker, you can pull the 12.0-rc1 or preview tags.

What's Changed (since `v10.11.x`)

Update CODEOWNERS to capture bump_version by @joshuaboniface in #7263
Add css variable support for dark theme by @thornbill in #7277
Refactor dark theme to base theme by @thornbill in #7343
Hide empty message box if there isn't text by @viown in #6151
Migrate dashboard user pages to use TS SDK by @viown in #7089
Refactor light theme to use base theme by @thornbill in #7347
Fix base theme icon color by @thornbill in #7386
Add delay setting for photo slideshow by @nesnass in #7038
Pass the new player to nextTrack to allow mixed playlist playback by @kevgrig in #5488
Add HEVC level 6.2 (186) device capability check by @imtsuki in #6376
Remove usages of deprecated framerate properties by @thornbill in #7395
Add support for custom links in the experimental layout by @thornbill in #7394
Use experimental layout by default by @thornbill in #7393
Use enum for item actions by @thornbill in #7389
Remove unused network share references by @thornbill in #7342
Use consistent padding on item details screen by @thornbill in #7279
Refactor themes structure by @thornbill in #7382
Use sdk for item download url by @thornbill in #7412
Remove dead itemsrefresher class by @thornbill in #7420
Add support for scanning tartgeted paths with lint npm script by @tylers-username in #7436
Tizen: Enable direct-play of anamorphic videos by @kinke in #7321
Fix item grid inconsistencies by @thornbill in #7435
Upgrade to NPM 11 and Node 24 active LTS by @larouxn in #7282
Fix .nvrmc to .nvmrc typo in PR GitHub workflow by @larouxn in #7522
Fix jellyfin sdk type errors by @PeachesMLG in #7491
Add missing Rewind & FastForward PlayState commands handling by @HamletDuFromage in #7527
Remove unused AudioPodcast item type by @dfederm in #7532
Remove reference to non-existing Recording media type by @dfederm in #7533
Remove unused showFindNew export from itemidentifier.js by @dfederm in #7537
Remove getData() and importFrom() dead code from userSettings.js by @dfederm in #7536
Add max value to streaming bitrate textfield by @haleyburns in #7519
Add video title to experimental layout by @viown in #7530
Clarify Playlist and Collections delete prompt by @dfederm in #7534
Remove old irrelevant comment about 'LabelSyncPlayTimeOffset' by @dfederm in #7535
Add caniuse-lite as dev dependency to keep it updated and update it by @larouxn in #7474
Mitigate pull_request_target privilege escalation by @andrewrabert in #7616
Add code assistance section to pull request template by @viown in #7619
fix book player fullscreen on mobile apps by @dkanada in #7399
Add playlist button and sort options to Playlists tab in experimental layout by @theguymadmax in #7538
loosen anamorphic restrictions for browser device profiles by @meop in #7520
Fix dashboard buttons overflow by @thornbill in #7648
Stop using native scrollTo for smooth scrolling by @larsmunkholm in #7606
move broken actions to workflow_run event by @dkanada in #7684
Fix react cards showing default background when loading by @thornbill in #7674
Hide home loading indicator optimistically by @thornbill in #7678
Fix react card text missing keys by @thornbill in #7675
define secrets for nested workflows by @dkanada in #7688
Add error handling to rest of dashboard pages by @viown in #7223
Migrate networking page to React by @viown in #7502
add debug logging to PR step in workflow by @dkanada in #7690
use pr list subcommand for pull request search by @dkanada in #7691
Fix login loop by @Crashdummyy in #7685
Add a Reset Filters button to bottom of filter dropdown by @1hitsong in #7130
remove merge group events from main workflow by @dkanada in #7692
Add watch feature to log viewer by @viown in #7268
improve author and book support on itemDetails page by @dkanada in #7656
Bump axios from 1.12.2 to 1.13.5 by @dependabot[bot] in #7578
Fix password input type for CertificatePassword by @DatScreamer in #7696
Use getBackupApi util from SDK by @thornbill in #7729
Remove var mixin by @thornbill in #7647
Cleanup typescript types by @thornbill in #7673
Fix active library highlighting for items by @thornbill in #7644
Extract getCardImageUrl and remove duplicate hook by @thornbill in #7676
initial sections for book library view by @dkanada in #7354
Fix multiselect panel styles by @thornbill in #7730
Add display version util for 12.0 by @thornbill in #7677
Fix sass if syntax by @thornbill in #7731
Move users edit page to tabs by @viown in #7497
Move card utils to utils directory by @thornbill in #7733
Update Music Videos views in experimental layout by @theguymadmax in #7567
Replace the buildin xbox limit it with a native shell option by @JPVenson in #7670
Add default tab options for Home Videos and Photos library by @theguymadmax in #7557
Add contributing guide and pr checklist by @thornbill in #7693
Bump picomatch by @dependabot[bot] in #7762
Add a gap to stack elements to prevent numbers from other adjacent stack to collapse and appear as one by @uxdesignerhector in #7419
Add a folder view to the modern home videos library layout by @theguymadmax in #7741
Fix CF pages deployment directory by @thornbill in #7784
Fix react keys on item details metadata by @thornbill in #7785
Fix theming for reactUtils component rendering by @thornbill in #7788
Refactor wmc theme to use base theme by @thornbill in #7789
Refactor blueradiance theme to use base theme by @thornbill in #7790
Add explicit dependency on axios by @thornbill in #7797
Bump lodash from 4.17.21 to 4.18.1 by @dependabot[bot] in #7793
Compact the "playback info" overlay to add more infos by @nyanmisaka in #7291
Enable AV1 fMP4 stream copy on TV clients by @nyanmisaka in #7802
Add device id to StorageListItem by @thornbill in #7756
add audiobooks back to book libraries by @dkanada in #7816
Fix chromium browsers not cleaning up backdrops by @thornbill in #7738
Cleanup removed api members by @thornbill in #7839
SyncPlay menu update by @thornbill in #7643
Add folders tab to experimental view in book libraries by @dkanada in #7822
Fix backdrop size changing on mobile by @thornbill in #7849
Fix clock icon alignment on scheduled tasks page by @TarasSmal in #7841
Handle Seasons in recently added by @Shadowghost in #7623
Add frame scrubbing controls by @flying-sheep in #7315
Refactor user hooks to simplify usage by @thornbill in #7875
Fix drawer display version by @thornbill in #7884
Bump web version to 12.0.0 by @thornbill in #7885
filter music artists from person results by @dkanada in #7882
Disable sonarjs/aws-restricted-ip-admin-access lint rule by @terite in #7847
Fix books not displaying in genre lists by @theguymadmax in #7911
Fix blurry card images on high-DPI displays by @Maxr1998 in #7879
Update sort options, default tab, and landing screen options for music videos by @theguymadmax in #7805
Update Collections & Playlists library view for the modern layout by @theguymadmax in #7808
Display music video title correctly if it belongs to an album by @hazemkrimi in #6819
Fix keyboard controls working only on latin keyboard layouts by @MBR-0001 in #7398
Fix duplicate locations by @Collin-Swish in #7469
Update Mixed Media library view for the modern layout by @theguymadmax in #7821
Fix genres not showing for collections and playlists by @theguymadmax in #7807
Use innerHTML instead of replaceChildren to empty div by @mrxz in #7907
Fix case sensitivity in library folder checks by @thornbill in #7914
Move bitrate detection to web by @viown in #7864
Bump axios from 1.13.6 to 1.16.0 by @dependabot[bot] in #7888
Add translation for VideoRotationNotSupported by @nyanmisaka in #7894
Use tanstack query for user settings by @thornbill in #7890
Fix homescreen settings for mixed libraries by @theguymadmax in #7916
Make library header sticky by @thornbill in #7836
Use tanstack query for home screen sections by @thornbill in #7918
show progress indicator for books by @dkanada in #7921
add authors tab to book library by @dkanada in #7874
Implemented sorting and filtering for Activity page by @bjorntp in #7431
Fix behavior when applying filters and switching pages by @Shadowghost in #7820
Fix keyboard in old browsers by @dmitrylyzo in #7917
Add warning to backup operation if scan is running by @viown in #7923
Add similarity provider configuration by @Shadowghost in #7663
Fix xss in checkbox element by @thornbill in #7942
Fix user view nav overflow logic by @thornbill in #7943
Encode auth params when creating ApiClients by @thornbill in #7947
Add collections tab for book libraries by @dkanada in #7946
Start a library scan when adding folders to a library by @Shadowghost in #7952
fix cardImage data-src set to "undefined" by @edvwib in #7929
Add Collections and playlist tab to all libraries by @Shadowghost in #7939
Add polish to library toolbar and menus design by @thornbill in #7927
Reload item data on version change and use correct parts on playback by @Shadowghost in #7919
Reload scroller on data receive by @Shadowghost in #7954
Add OriginalLanguage as option to PreferredAudioLanguage by @Lampan-git in #6022
Fix layout mode for library routing by @theguymadmax in #7951
Replace ElevationScroll with OffsetAppBar by @thornbill in #7965
Fix alphapicker alignment on desktop by @thornbill in #7964
Fix backdrop in music queue by @me25542 in #7897
Migrate WebSockets to SDK Subscriptions by @anultravioletaurora in #7838
Disable touch switcher on experimental and disable scroll buttons on touch devices by @Shadowghost in #7971
Studios tab extension by @Shadowghost in #7940
Fix image upload spinner on failure by @darbyjack in #7949
Implement studio search by @Shadowghost in #7970
Support DOVI in mkv container on WebOS 25 and newer by @ErebZx in #7328
Fix OSD animation event hiding header after leaving the video player by @brad1111 in #7968
Fix navigation with game controllers by @MBR-0001 in #7975
Fix slideshow interval not saving by @theguymadmax in #7983
Use String.raw to avoid escaping backslashes in eslint config by @Mayme123 in #7866
Remove repository prefix for pages deployment on push workflow by @nielsvanvelzen in #7978
Fix broken layout on table pages by @thornbill in #7990
Only show Play All button when items are present by @theguymadmax in #7988
Add Play All and Shuffle buttons to series library by @theguymadmax in #7989
Hide Group Versions for unsupported item types by @theguymadmax in #7999
migrate book OSD to react component by @dkanada in #7848
Fix Multiselect not working in collections by @austinhardaway in #7925
Add still watching prompt by @thornbill in #7979
When deleting a single item, include the name of the item in the confirmation message by @joshuaobrien in #7697
Refactor library pages by @thornbill in #7998
Fix playback issues in the home videos and photos library videos tab by @theguymadmax in #7986
Fix blurhash and faster animation settings in new layout by @nyanmisaka in #8014
Hold and drag on media no longer activates Multi-select by @bjorntp in #7732
Merge library toolbar into main AppBar by @thornbill in #8030
Fix Add to collection permissions by @theguymadmax in #8036
Respect DisplayMissingEpisodes setting in item details pages by @lmaotrigine in #7810
Add audiobooks to the authors tab by @theguymadmax in #8034
Fix New Collection button permissions by @theguymadmax in #8037
Always round up for card image sizes by @enter-a-random-username in #8022
Add query caching to indexeddb by @thornbill in #7679
Prevent invalid paths from being added to the list of folder paths by @theguymadmax in #8048
Make Played and Unplayed filters mutually exclusive for the Modern view by @theguymadmax in #8002
Fix errors on view change with pending requests by @thornbill in #8055
Use plugin provided icon if available by @Shadowghost in #8053
Adjust the section header link limit by @theguymadmax in #8019
Remove pagination controls if user disabled by @thornbill in #8059
Add Screensaver Time to Experimental layout by @dmitrylyzo in #8052
Hide studios filter when empty by @theguymadmax in #8058
Fix wrong settings applied on view change by @thornbill in #8062
Disable play all and shuffle buttons instead of hiding by @thornbill in #8056
Fix Duplicated /socket Connections by @anultravioletaurora in #8011
Add TV Shows creators to item details by @Rant423 in #8042
Allow folders to be marked as played by @theguymadmax in #8063

New Contributors

@nesnass made their first contribution in #7038
@imtsuki made their first contribution in #6376
@tylers-username made their first contribution in #7436
@larouxn made their first contribution in #7282
@HamletDuFromage made their first contribution in #7527
@dfederm made their first contribution in #7532
@haleyburns made their first contribution in #7519
@meop made their first contribution in #7520
@larsmunkholm made their first contribution in #7606
@Crashdummyy made their first contribution in #7685
@1hitsong made their first contribution in #7130
@DatScreamer made their first contribution in #7696
@uxdesignerhector made their first contribution in #7419
@TarasSmal made their first contribution in #7841
@flying-sheep made their first contribution in #7315
@hazemkrimi made their first contribution in #6819
@mrxz made their first contribution in #7907
@Lampan-git made their first contribution in #6022
@me25542 made their first contribution in #7897
@anultravioletaurora made their first contribution in #7838
@darbyjack made their first contribution in #7949
@ErebZx made their first contribution in #7328
@Mayme123 made their first contribution in #7866
@austinhardaway made their first contribution in #7925
@joshuaobrien made their first contribution in #7697
@Rant423 made their first contribution in #8042

Full Changelog: v10.11.11...v12.0-rc1

jellyfin/jellyfin-web v12.0-rc1 12.0 RC1 on GitHub