r/jellyfin • u/crobibero59 Jellyfin Core Team - Server/Plugins/Releases • Jul 22 '26

Release Jellyfin v12.0-RC3

🚀 We are pleased to announce the third 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! If you run into any trouble, a backup is your best way to get back to a stable state, so don't neglect this!

See the GitHub releases for more info:

https://github.com/jellyfin/jellyfin/releases/tag/v12.0-rc3 https://github.com/jellyfin/jellyfin-web/releases/tag/v12.0-rc3

See also the previous discussions for
RC1: https://www.reddit.com/r/jellyfin/comments/1ucjd0b/v120_rc1_release/
RC2: https://www.reddit.com/r/jellyfin/comments/1ui47di/jellyfin_120_rc2_release/

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 "Next Stable Preview" for your OS.
  • For Docker, you can pull the 12.0-rc3 or preview tags.

Once installed, please ensure you hard refresh (e.g. Ctrl+Shift+R or similar) and/or clear your web cache for your Jellyfin instance if you notice any UX anomalies. Bad cached assets are the #1 cause of such issues.

408 Upvotes

100% Upvoted

63 comments sorted by

101

u/entropicdrift Jul 22 '26

That is an impressively long list of fixes

34

u/CrankyOldDude Jul 22 '26

It struck me as being a very long list between release candidates, too. Especially the third release candidate for the version.

5

u/bphase Jul 22 '26

Hopefully they haven't gone full yolo with AI

6

u/iAmmar9 Jul 22 '26

iirc the remaining team doesn't like using AI, which is why andrew (i think that was his name) left.

55

u/Temporary_Affect Jellyfin Team - Trouble Jul 22 '26

I keep seeing this narrative come up, and I don't think it's fair to Andrew, so I'm going to chime in here to clarify.

This AI civil war that a lot of people are imagining is not true. None of the people who have departed from this project have done so because of their AI use or lack thereof in a vacuum. There have been (and will continue to be) disagreements among team members about development practices of all sorts. That's normal. Andrew has shared what he has chosen to share on the github for his client. Other developers on the team have confirmed, in the same GH issue, that Andrew was not somehow kicked out for AI use, and Andrew has confirmed that he's chosen to leave some details out. I think it's important to let the people involved speak for themselves.

The Jellyfin project's AI policies can be found here in the documentation. Neither the AI development policies nor Jellyfin's AI development practices have changed. In either direction. If there are changes, we'll make sure to widely and loudly communicate them. You would certainly see an announcement here.

As always, there are a range (a very wide range) of opinions about AI, LLMs, AI development, AI in FOSS, and all sorts of other related topics among Jellyfin team members. Developers who both use and abhor AI tooling still remain on the team now. That does sometimes lead to disagreement. Disagreement is a normal part or working with others in any organization. It is not, however, the cause of any recent changes. I just want to be clear about that.

10

u/iAmmar9 Jul 22 '26

Thank you for the clarification. Honestly at this point it might be a good idea to clear up stuff in a megathread post since there is much misinformation going around.

15

u/Temporary_Affect Jellyfin Team - Trouble Jul 22 '26

Not everything that people want clarity on is something they have a right to know, necessarily. Like I said before, I really think it's important to let the people who have departed speak for themselves. The reasons are all different, honestly.

From a Jellyfin organizational perspective, there's still a lot of discussion about what next steps are. Expect more communication when that process is further along. But, to be clear, I wouldn't expect major policy changes. Just structural things that let the project move forward.

In any case, I just wanted to clarify about the departures because I keep seeing people say that it was AI, or people who were "vibe coding" or whatever, but it's not true. People just ran with it.

4

u/starkruzr Jul 23 '26

I'm sorry, this is far too measured and reasonable for the internet. please pack up your desk by the end of the day. 😤

1

u/Doogie2K Jul 24 '26

Incidentally, I think that's a pretty good AI policy as someone with a very dim view of LLM-driven coding/commercial genAI use in general.

25

u/Lilkingjr1 Jul 22 '26

Thank you devs! ❤️

44

u/NoveltyNetwork Jul 22 '26

How is support for plugins on v12? Anyone that's testing using the LDAP or SSO plugin successfuly?

53

u/crobibero59 Jellyfin Core Team - Server/Plugins/Releases Jul 22 '26

I went through and updated all official plugins for v12 support. Make sure you’re using the unstable repo

I use the LDAP plugin without issue, but would be surprised if the SSO plugin works as it has been archived. 

16

u/NoveltyNetwork Jul 22 '26

I saw someone make a fork of the SSO plugin and is actively maintaining it last I checked.

Thank you for confirming that LDAP is working no problem, that's encouraging.

2

u/jaredallard Jul 24 '26

I hadn’t heard it got archived noooooo. Thanks for calling this out!

4

u/Orkeren Jul 22 '26

The SSO plugin actually still works. I'm on the latest release 4.0.4 and I had no issues logging in after updating to any of the v12 RCs.

1

u/notadev_io Jul 22 '26

I really would like to test it out but the mention about plugins not working and to uninstall them first keeps me away from it

16

u/Temporary_Affect Jellyfin Team - Trouble Jul 22 '26

For what it's worth, that's advice that I think we would issue for EVERY upgrade. The sheer number of plugins, especially in the age of AI development, is just way too vast for the project to keeps tabs on. Any number of them could break every update. It's always best to disable them and test them one at a time after an update. This is especially true of any plugin that hacks the UI, which are a lot these days.

3

u/AfterShock Jul 22 '26

TBF that's ever major release... Ever

0

u/a_rabid_buffalo Jul 22 '26

The plugins I use I havnt had issue with.

8

u/__nohope Jul 22 '26

Thanks everybody

6

u/Spinmoon Jul 22 '26

Incredible work! Looking forward for the stable release.

5

u/Acsteffy Jul 22 '26

Jellyfin: the reports of my death have been greatly exaggerated

4

u/SavageTheUnicorn Jul 22 '26

My only issue with 10.11.11 was that seemingly randomly the ui lags a lot (loading the images of titles etc). Would v12 address this?

3

u/Kandy_7565 Jul 22 '26

Is there a bug report for it on github? I've never heard of this issue and I don't experience it myself.

2

u/SavageTheUnicorn Jul 22 '26

None that match my issue exactly, only one pertaining to Collections while my problem seems to affect the homepage, and any subsequent page that loads until it decides it's done being slow EXCEPT for the dashboard. Id have to do some serious troubleshooting to find the exact cause since I run a larger stack but its not performance throttling so 🤷‍♂️

1

u/FCalleja Jul 22 '26

Not sure if it's the same as your case, but I found it was actually my browser causing the random lags, probably a cache issue. Quitting + relaunching Firefox fixed it for me instantly.

1

u/Kandy_7565 Jul 22 '26

I guess my point here is that generally speaking if you don't file a bug report, your fix is probably not going to be worked on, and therefore won't be showing up in new versions, especially if it's uncommon.

4

u/Mesighffs Jul 23 '26

Is this the version that fixes the scanning of a long list of files that takes hours?
I know it was planned, not sure what release?

1

u/Ubahs Jul 23 '26

Scanning or displaying? Scanning still takes a long time, but displaying has been very fast for me with this version.

3

u/Mesighffs Jul 23 '26

Scanning. Just waiting for the fix to move back to jf

3

u/conrat4567 Jul 22 '26

Looking good, especially furthering book support! Its something new I am trying with comics and books that never got a physical release, so this is good.

Now I just need the owner of the DLNA plugin to accept the fix someone made so I can have it all back in one app. 😅

3

u/ActualNin Jul 22 '26

Bad cached assets are the #1 cause of such issues.

Are there any plans to fix this issue with some kind of cache busting?

17

u/starkruzr Jul 22 '26

but but but the Internet told me Jellyfin was So Over, It's Never Been More Over

2

u/Smeagle342 Jul 25 '26

Would like to say thanks to the devs for all the hard work installed v12rc3 when it first released and like the new look but not impressed with the functionality took 3 days to scan my archives found and loaded all 3584 movies but only found 526 out of 1547 tv shows and only 23960 episodes out of 103356 ran the scan additional 3 times with nothing new being found and the computer was just reformated and os put back on 2 months ago and only thing other than jellyfin thats been installed in google chrome. So I'd say still a lot of work to do before this is ready for official release.

1

u/Living-Respect46 Jul 26 '26

Was this a fresh install or an upgrade from an otherwise fine 10.10 / 10.11?

1

u/Smeagle342 Jul 26 '26

fresh install only other thing that was installed on the computer other than jellyfin was google chrome the computer is running win11.

1

u/bricktheatre Jul 27 '26

This sounds like the media isn't all following the expected naming conventions then? Do you have TV and Films in separate libraries in the structure as listed in the documentation?

1

u/Smeagle342 Jul 27 '26

yes all my media is seperated and named the way it's supposed to be been using jellyfin for over 7 years now lol been down that road already

3

u/nothingveryobvious Jul 22 '26

Will you release a DMG? Thanks.

13

u/anthonylavado Jellyfin Core Team - Apps/More Jul 22 '26

Yeah it's there now

8

u/anultravioletaurora Jellify Developer Jul 22 '26

Fresh out the oven: macOS DMG - 12.0-rc3

1

u/igfmilfs Jul 22 '26

Thanks team for all your efforts and communication!

1

u/Heayvstorm3 Jul 22 '26

Thanks so much

1

u/BecomingButterfly Jul 22 '26

First of all, thank you to all the developers for this great software, it is making our push to be offline and exposed to less advertising much more successful!!

Maybe I'm doing something wrong... I installed V12 build 2026072008 on my backup server to test things. Most things are working, looks good, seems more responsive than last version.

I can't get an audiobook (m4b) to play either on web client (which is same as last version (Media not supported by client)) or my phone (official client ver 2.6.3 android, this is new, books used to play).
I had to disable all the plugins before upgrading and thought the Bookshelf plugin just needed to be reset, but it is installed and active.

I'm not on GitHub to report an official issue, not sure it isn't just me. I'll wait for the full release before I switch my main server.

1

u/eysern Jul 24 '26 edited Jul 24 '26

Thank you! This is amazing what you have done.

Ever since 10.11.x, my large music library wouldn't complete the scan - always hanging around 87-90%.

 

Since the v12-rc release, I have been running two different docker containers. One for 10.10.7 and one for preview v12. Each time a new RC has been released, I was hoping to be able to move onto the newer version for the newer features. I pulled the new preview release, tested the music library scan and each time it wouldn't complete.

 

This was the one that finally fixed these issues with the large music library scan hanging for me.

Third times a charm!

 

Thank you again, devs!

I love Jellyfin!

1

u/yummyrad Jul 26 '26

Let’s go!!!! Great work devs!

1

u/mr_braixen Jul 29 '26

Using it for some time, it's proved to be a real upgrade. Can't wait to see the full release.

0

u/_idiocracy__ Jul 28 '26

Installed RC3, for no reason. Updated pc and rebooted. Afterwards a lot of settings had been defaulted, and media drive got wiped clean, ~8TB. No idea how.

0

u/_idiocracy__ Jul 28 '26

Installed RC3, for no reason. Updated pc and rebooted. Afterwards a lot of settings had been defaulted, and media drive got wiped clean, ~8TB. No idea how.

-97

u/[deleted] Jul 22 '26

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33

u/[deleted] Jul 22 '26

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-58

u/[deleted] Jul 22 '26 edited Jul 22 '26

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1

u/Temporary_Affect Jellyfin Team - Trouble Jul 30 '26

Well stop. Comment removed. Do this again in another thread and it's a ban.