2025-12-12, 02:38 PM
(This post was last modified: 2025-12-12, 03:19 PM by raulo1985. Edited 3 times in total.)
Do you have the prefer fMP4-HLS setting enabled or disabled on your WebOS client? Try disabling it if it's enabled. And if that doesn't work, try enabling it again and also enable the use shorter segments setting. And I would remux the file first before testing those settings, MKV is problematic on WebOS, specially with DV.
If nothing of the above works and if you can and have backups of your setup, I would try downgrading to JF 10.11.2 (if you do, don't forget to have backups). Since JF 10.11.3 a commit was reverted and the web client is using the WebOS native player again instead of hls.js. Some users (including myself) have better results avoiding the WebOS native player, which is kind of buggy. JF 10.11.2 still used hls.js in the case of WebOS. If you could try this, I would reinstall/downgrade jellyfin-server and jellyfin-web to version 10.11.2, and try with your files (ideally MP4) with both prefer fMP4-HLS and use shorter segments settings enabled.
If nothing of the above works and if you can and have backups of your setup, I would try downgrading to JF 10.11.2 (if you do, don't forget to have backups). Since JF 10.11.3 a commit was reverted and the web client is using the WebOS native player again instead of hls.js. Some users (including myself) have better results avoiding the WebOS native player, which is kind of buggy. JF 10.11.2 still used hls.js in the case of WebOS. If you could try this, I would reinstall/downgrade jellyfin-server and jellyfin-web to version 10.11.2, and try with your files (ideally MP4) with both prefer fMP4-HLS and use shorter segments settings enabled.