ID 414828 - ProRes Quicktimes have wrong colour metadata

Problem summary
Nuke writes ProRes Quicktimes with incorrect colour primaries metadata (Rec.601 when it should be Rec.709).

Customer reported version
Nuke 12.1v1

Steps to reproduce

1) Write out a ProRes QuickTime file using Nuke.

2) Check the metadata using Nuke.

3) quicktime/nclc_primaries should indicate Rec.709 metadata values.

4) Check the metadata using RV using the Image Info Widget.

5) COLR/Primaries and ColorSpace/Primaries metadata fields should be present and indicate Rec.709.

Expected behaviour
Nuke should write ProRes QuickTimes with the correct colour primaries metadata (Rec.709).

Actual behaviour
Nuke writes ProRes QuickTimes with incorrect colour primaries metadata (Rec.601).

Workaround
Unknown.

Reproduced by support

This bug has been reproduced by QA.