Jellyfin won't play file in HDR mode

[crunge]

I am moving from Plex to Jellyfin and the only issue keeping me from shutting down Plex for good is that Jellyfin won't play HDR files as HDR; my TV indicates when it goes into HDR mode and while this works when I play the file with Plex, it does not for Jellyfin. I've searched for a solution but can't find one. Am I missing a setting that will address the issue?

Both Jellyfin and Plex are running on the same server, a Windows 11 machine with an i9-13900H and 32GB RAM. The Jellyfin server version is 10.11.6. This happens on two different TVs, both using Roku.

The file info is below. Again, if I play this with Plex, the HDR icon pops up on the TV and the video looks great. If I play it with Jellyfin, the HDR icon does not appear and the video looks washed out. Any advice is appreciated.

Video
Title: 4K HEVC Dolby Vision Profile 8.1 (HDR10)
Codec: HEVC
AVC: No
Profile: Main 10
Level: 150
Resolution: 3840x2160
Aspect ratio: 16:9
Anamorphic: No
Interlaced: No
Framerate: 23.976025
Bitrate: 29962 kbps
Bit depth: 10 bit
Video range: HDR
Video range type: DOVIWithHDR10
DV title: Dolby Vision Profile 8.1 (HDR10)
DV version major: 1
DV version minor: 0
DV profile: 8
DV level: 6
DV rpu preset flag: 1
DV el preset flag: 0
DV bl preset flag: 1
DV bl signal compatibility id: 1
Color space: bt2020nc
Color transfer: smpte2084
Color primaries: bt2020
Pixel format: yuv420p10le
Ref frames: 1

[cewert]

Sounds like the file is an MKV container. Roku support for dolby vision using MKV is inconsistent and not great. Either convert to mp4 or force a remux to preserve dovi.

JellyRock has a user setting, Preserve DoVi, that will automatically remux dovi files in mlv container to mp4. That should fix your problem.