Dolby Vision Playback Freezes on LG TV

[Lemaireus]

Jellyfin server: 10.10.7
Windows 11 Installer
Samsung Monitor LS32A800NMWXXL with HDR
Intel Core i5, 13600K, Raptor Lake
32 GB DDR5 RAM, 6000MHz
Crucial T500 2TB Gen 4 NVMe M.2 SSD

There are no playback issues on the PC: Samsung does not support Dolby Vision so that is that.

The problem occurs when I am streaming from the PC to my LG TV which supports Dolby Vision playback.

The latest Jellyfin client is running on LG 55-inch TV 55QNED88T with WebOS 23.20.51.
The TV is hooked to Denon AVR-X2600H through the HDMI eARC port for audio.

Each time I try to play an MKV file with Dolby Vision, profile 8.1 (I have not run tests with other DoVi formats), the playback triggers 'Dolby Vision' on the TV exactly as it should. However, the playback freezes after about ten to fifteen seconds. If I skip back or forward in the video, it'll play fine for another ten-odd seconds before freezing again.

Since LG apparently supports only MP4 playback, I encoded a Dolby Vision film in the MP4 container. The file froze after ten-odd seconds exactly as the MKV had.

The subtitles are turned off in all the aforementioned cases.

There is no problem whatsoever in watching HDR10/HDR10+ movies with the MKV container. They trigger HDR on the TV exactly as they should, and the playback is smooth and judder-free.

There are no audio issues: I have a 7.1 speaker setup--not Atmos--hooked to the Denon AVR and 5.1 and 7.1 audio playback works flawlessly.

[Not sure if this is relevant, but an interesting detail nonetheless: I had first installed the Plex server on the PC and its client on the TV. However, Plex never triggered 'Dolby Vision' on my TV and played back DoVi MKV files as only HDR content. The playback in HDR mode, though, was smooth. In fact, that was why I moved over to Jellyfin, because Plex did not trigger Dolby Vision on my TV while playing my MKV files with DV Profile 8.1.]

I had searched the forum for Dolby Vision playback issues and found quite a few threads but could not find one that might have a solution to the problem I have run into. If I have missed a thread, I would be grateful for a link.

Thank you!

[bitmap]

Can you upload your logs to a pastebin site like privatebin.net and post them here? Both Jellyfin and ffmpeg logs (if they exist). If you haven't triggered this issue lately, recreate it, then upload those logs.

I have had enough issues with DV on my LG C1 to abandon it entirely. I never noticed much difference when I was able to get it to work, so not a big loss in my book. Plus it's barely supported in AV1, which is my bread and butter.

[nyanmisaka]

https://github.com/jellyfin/jellyfin-web/pull/6530

This fix should be related.

[Lemaireus]

Can you upload your logs to a pastebin site like privatebin.net and post them here? Both Jellyfin and ffmpeg logs (if they exist). If you haven't triggered this issue lately, recreate it, then upload those logs.

I have had enough issues with DV on my LG C1 to abandon it entirely. I never noticed much difference when I was able to get it to work, so not a big loss in my book. Plus it's barely supported in AV1, which is my bread and butter.

Thank you, bitmap, for sharing your experience with LG C1. I am planning to get the LG G5 in a couple of months but I'll hold off until I can get the Dolby Vision issue resolved. If I cannot get Dolby Vision playback, then there is little point in splurging on the G5.

I am out of town for a couple of days. Will post the logs once I get back home. Triggering the issue won't be a problem at all: the playback freezes after ten to fifteen seconds every single time when I play an MKV file with Dolby Vision, profile 8.1.

[Lemaireus]

https://github.com/jellyfin/jellyfin-web/pull/6530

This fix should be related.

Thank you, nyanmisaka. That seems exactly like the problem I have and the solution, therefore, should work. I am out of town for a couple of day so won't be able to try the patch/fix until I get home. Since this is exactly the issue Jellyfin runs into with WebOS, I'll keep my fingers crossed and hope the patch works, or gets incorporated into Jellyfin's next Windows release.

Thank you for the lead; can't wait to get back and give the patch a run through. I'll post an update after I run the patch.