Noob here with weird problem regarding DolbyVision transcoding.

[daspunner]

Hi y'all!

I am trying to transcode DolbyVision-content to SDR. In Jellyfins own webplayer they look right but in Kodi with the Jellyfin addons they look green/pink/purple.

Server and client are on the same machine due to the lack of real HDR/DV-support on the display. Transcoding are done through a RTX3060.

Sidenote: HDR-content transcoded with Jellyfin works with Kodi but not DV.

Any ideas?


/Dave

[pxr5]

What Dolby Vision Profile is the the file you are playing back? As for Kodi it has a setting under Video Processing (Settings - Player - Videos - Dolby vision compatibility mode) - set to yes, will convert Profile 7 to 8.1 for better compatibility. Also in Video Processing there is a setting to choose what HDR type is allowed - HDR10/DV.

[TheDreadPirate]

Is Kodi configured to locally tone map? What you've described tells me this is a Dolby Vision profile 5 video.

[daspunner]

Yes it is DV profile 5. So the problem is in Kodi? I think so too. Even the Jellyfin-client on my Android shows correct colors.

[pxr5]

In Kodi Both jellyfin-kodi and jellycon have options in the config to transcode. Kodi itself can't transcode anything.

[daspunner]

In Kodi Both jellyfin-kodi and jellycon have options in the config to transcode.  Kodi itself can't transcode anything.

Are we talking of Kodi in Windows now? Checked both addons and I can't find any setting for transcoding.

[daspunner]

Never mind! I found it!

The videos are a little dark tough. Nothing I can't fix with brightness setting in Kodi but can adjust something so the transcoded streams are brighter from start? Transcoding settings in Jellyfin server perhaps?

[TheDreadPirate]

Did you change any of the transcoding settings for tone mapping? By default the output of a tone mapped transcode should be pretty close in brightness to a native SDR video.

[daspunner]

No I did not change any parameters regarding transcoding. Since I know so little about transcoding I just followed the guide stating that best setting for new users was to set algorithm to BT.2390.

Are there any places that I could read a little bit more about Jellyfin and transcoding? Their documentation is very basic.

[TheDreadPirate]

Fiddled around with some settings and couldn't find a way to reliably increase brightness that did make it worse for other content.