ID 606167 - When enabling Monitor Out's Enable Colorimetry Metadata, Nuke outputs Rec.2020 HDMI metadata rather than Rec.709 for DCI-P3 colorspaces when using the Blackmagic UltraStudio 4K Mini

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Problem summary
When enabling Monitor Out's Enable Colorimetry Metadata, Nuke outputs Rec.2020 HDMI metadata rather than Rec.709 for DCI-P3 colorspaces when using the Blackmagic UltraStudio 4K Mini
 
Customer reported version
nuke.n/a
 
Customer reported platform
 
Steps to reproduce
 
1) Connect a Blackmagic UltraStudio 4K Mini HDMI's output to it's input with a HDMI cable and set it up to work with the test machine

2) Download Blackmagic's SDK from here: https://www.blackmagicdesign.com/uk/developer/products/capture-and-playback/sdk-and-software

3) From the SDK samples, launch CapturePreview 
 
4) Launch Nuke
 
5) Create a ColorWheel node and view it
 
6) Open the Viewer properties>Monitor Out tab then set the following options:
  • Check Enable Monitor Out
  • set Device to UltraStudio 4K Mini
  • Check Enable Colorimetry Metadata
 
7) In CapturePreview, set Input Connection to HDMI and press Start Capture, in the Ancillary Data it shows the Colorspace is set to Rec.2020
 
8) In Nuke change the Color Gamut to DCI-P3-D65, in CapturePreview the Ancillary Data still shows the Colorspace is set to Rec.2020
 

 
Expected behaviour
For the Colorspace metadata for DCI-P3 gamuts to be Rec.709
 
Actual behaviour
 The Colorspace metadata for DCI-P3 gamuts is set to Rec.2020
 
Workaround
Unknown.
 
Reproduced by support
This bug has been reproduced in:
Nuke 16.0v4 - macOS Sonoma
Nuke 14.0v1 - macOS Sonoma
 
Earliest version tested
Nuke 14.0v1 - This feature did not exist before this version
 

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