ID 271332 - BM Decklink Studio 2 colours in 8-bit different to 10-bit mode.

Problem summary

Using the Blackmagic Decklink Studio 2 video card in 8 bit mode distributes colours slightly different to 10 bit mode, when using a colorwheel image.

Customer reported version
nuke.10.5v2

Customer reported platform

Steps to reproduce

Open Nuke X.
Import attached ColorWheel.0001.dpx file.
Attach to the viewer
Open the monitor output settings and enable card ideally Decklink studio 4K. (This is the only equivalent card we have.)
Switch to 8-bit mode.
Notice on the broadcast monitor the white point in the centre of the colourwheel in off centre.
Switch to 10bit mode.
Notice that the white point is outputing correctly with the white point in the centre of the colorwheel.

Workaround

Switch video card to 10bit mode in NukeX.

Reproduced by support

This was seen on a clients machine.

Reproduced in clients build of 10.5v3

Expected behaviour

The white point should be in the centre of the colourwheel in 8 bit mode and not just in 10 bit.

Actual behaviour

The white point in the colourwheel is off centre when selecting 8 bit mode. It should be clearly in the centre of the colourwheel.

We're sorry to hear that