ID 587613 - Small resolution ProRes files are not read in in the correct colour

 

Customer reported version
nuke.15.1v3
 
Customer reported platform
alma9
 
Steps to reproduce
 
1) Launch Nuke

2) Create a ColorWheel node and set the format knob to HD_1080 1920x1080

3) Create a Write node and write out a ProRes .mov file, all other knob values default
 
4) Read it back in and compare it to the original Colorwheel, it's the same colour
 
5) Create a Refomat node between the ColorWheel and Write node
 
6) Set the Reformat's type to scale and set the scale to 0.5
 
7) Render again and bring in the new file, it is now different to the other render and the ColorWheel
 

 
Expected behaviour
For Nuke to be able to render an image and read it back in the same colour
 
Actual behaviour
When reading in the lower resolution Prores file, it's darker than the original image
 
Workaround
Unknown. 
 
Reproduced by support
This bug has been reproduced in:
Nuke 15.1v3 - Windows 10, macOS Sonoma, Rocky 9
Nuke 15.1v1 - Windows 10, macOS Sonoma, Rocky 9 - Windows/Linux regression
Nuke 14.1v1 - macOS Sonoma - macOS regression
 
Unable to reproduce bug in:
Nuke 15.0v5 - Windows 10, Rocky 9
Nuke 14.0v6 - macOS Sonoma
 
Earliest version tested
Nuke 14.0v6  - This issue doesn't appear in this version and has regressed