Dolby Vision Profile 5 does not play correctly (DirectPlay)

[kaysond]

Software Versions

• Jellyfin Server Version: nightly (10.9.0; also happens with 10.8.13)
• Roku Client Version: 2.0 build 5

Describe the bug

When playing a video with the following profile, the colors have a green/purple hue, as if the setup does not actually support HDR, when it in fact does.

Video
Title: 4K HEVC HDR
Codec: HEVC
Profile: Main 10
Level: 150
Resolution: 3840x2160
Aspect ratio: 16:9
Interlaced: No
Framerate: 24
Bitrate: 16373 kbps
Bit depth: 10 bit
Video range: HDR
Video range type: DOVI
DV title: DV Profile 5
DV version major: 1
DV version minor: 0
DV profile: 5
DV level: 6
DV rpu preset flag: 1
DV el preset flag: 0
DV bl preset flag: 1
DV bl signal compatibility id: 0
Pixel format: yuv420p10le
Ref frames: 1

How To Reproduce

1. Find video with above profile
2. Play it without Transcoding

Expected behavior

Video should play as HDR

Logs

Server debug log: https://hastebin.com/share/omiqezupev.yaml

Screenshots

Connection Information

Local over https

Additional context

I'm playing this on a Roku 4800X which supports the above video profile. If I use Roku Media Player to play the file, it works just fine, and my TV shows "HDR". With Jellyfin, "HDR" does not show up, and I get the incorrect colors. I suspect the Roku is trying to play it as SDR. Maybe there's some kind of hint that has to be given to the player API to decode it as HDR?

[kaysond]

Bump. I'm happy to help debug and/or fix this if someone can help point me in the right direction.

[cewert]

Nothing jumps out to me that could be causing this but I also don't use HDR. Note that your device has two versions, Roku Ultra and Roku Ultra LT. The Roku Ultra LT also supports HDR10+.

Here's the docs for HEVC - https://developer.roku.com/en-ca/docs/specs/media/streaming-specifications.md#supported-video-codecs

A good first step when debugging video files, is to see if roku's own media player can play the file correctly. If that can't play the file, then neither can our app.

[kaysond]

@cewert - I have the non-LT. I mentioned this in the "Additional Context", but Roku Media Player can play the video files just fine.

My theory is that for some reason in the Jellyfin app, it's trying to play the video as non-HDR, so it's decoding the colors incorrectly. I believe that the HDMI link has to specify the color range, so maybe there's some command that sets the Roku into an HDR mode?

[kaysond]

Yeah I think I'm on the right track.

Here's my receiver's video info when playing on Jellyfin:

And when playing on RMP:

I did a quick search through the Roku dev docs, and the only mention I could find of HDR was the downloadedSegment property of the TrickPlay fields on a video media playback node. It says it only applies to DASH/HLS, but maybe it's taking a cue from there as to how to set up the HDMI link?

[cewert]

There's no HDR flag to toggle that I'm aware of.

Thanks for the testing info. That explains why your colors are off but I'm not sure what the fix is at this time.

[kaysond]

There's no HDR flag to toggle that I'm aware of.

Thanks for the testing info. That explains why your colors are off but I'm not sure what the fix is at this time.

Can you give me a rough idea where in the code the video player is set up? I'll try messing around with it and see if I can get anywhere.

[kaysond]

Bumping. I made a slightly interesting discovery today - this issue doesn't impact regular HDR videos. Just DoVi. No idea why but maybe that helps narrow things down.

[jimdogx]

Just triple checking, does the server indicate that it's direct playing? Or is it transcoding / remuxing by chance?

[kaysond]

Direct play

[kaysond]

@cewert - are you ok with me putting a bounty on this?

[cewert]

@kaysond Maybe #1919 would fix this?

[kaysond]

@kaysond Maybe #1919 would fix this?

Definitely will give it a shot and let you know

[kaysond]

@cewert - #1919 doesn't fix it. It looks like these profiles are sent to the jellyfin server to determine valid codecs? That's not relevant for this issue because it's already directplay. The problem is in how the roku player is being set up to play dovi.

[kaysond]

I'll try to dig in a bit more now that I've got the dev stuff set up, but in the meantime - I'm going to put up $100 for anyone who can fix this (with permission of maintainers)

[cewert]

@kaysond what does it say under roku settings -> Display type?

[kaysond]

@kaysond what does it say under roku settings -> Display type?

Automatic 4k Dolby Vision