How do you capture in HDR when there's no 10bit video format option for the source properties?

[DaveyMames]

OBS said that you can record in HDR: https://obsproject.com/kb/video-capture-devices-with-hdr-support

However, in the Source Properties for OBS 31.0.2 in Windows 11 "Video Format" doesn't have "P010" as an option which you need for a 10bit source so how do you properly capture in HDR?

My source is HLG HDR. Do I have to capture in SDR then do tonemapping? If so, any idea how to do tonemapping? Thanks

 

[koala]

You need to select a 10-bit color format in Settings > Advanced > Vidoe > Color format to switch OBS to HDR processing in general.

 

[DaveyMames]

But that's just the output. Why have a Video Format for the video input if it serves no purpose? There's only NV12 and YUY2 for the Video Format input which are 8-bit colour formats.

I'm having trouble getting the colours of a Sky Q 2160p 50hz HLG F1 channel to come out correctly. These are my settings:

Source Properties: Video Format: NV12
Color Space: Rec. 2100 (HLG)
Colour Range: Limited

Settings: Advanced > Color Format: P010 (10bit) [This makes the video 10bit]
Color Space: Rec. 2100 (HLG)

The colours a a bit too over saturated in the capture. I could instead set the input nd/or output color a space to Rec 2100 PQ but that makes the picture look even worse.