I'm trying to use the Colour Grading panel on a media clip. As soon as I change any control on the panel, the preview video clips and goes washed out and the waveform shows a drop from a peak of 500 nits to clipping at 100.
Any ideas what is going wrong?
Found the problem - looks like a new color grading defect present in Vegas Pro 22 Build 122.
In Vegas Pro 21 Build 315 there is no issue.
The difference between VP21 Build 315 and VP22 Pro Build 122 is reproduceable and clear to see.
Running the steps below on VP21 Build 315:
1) Start Vegas and drag the clip below onto the timeline:
https://drive.google.com/file/d/1RRy-F6xHccULCGl6mBu4e-dbonfmM8Sb/view?usp=sharing
2) Set Media Properties Color Space to: Panasonic - V-Log - V-Gamut
3) Set Media Properties Color Range to: Full
4) Confirm Project Properties are: HDR10, 32-bit floating point (full range), 1.000, Default (ACES2065-1), Rec. 2020 ST2084 1000 nits (ACES) (Vegas has already set these)
5. Click on HDR button on Video Preview.
6. Note the Wave form shows the clip peaking around 500 nits.
7. Click on track Colour Grading icon
8. Set Color Wheels Gain Y to 0.999.
Waveform stays peaking at 500 nits, video preview still looks good. This is what I would expect after making such a minor change.
Now lets do the same on Vegas Pro 22 Build 122:
1) Start Vegas and drag the clip below onto the timeline (click Yes when Vegas asks to match project settings to media):
https://drive.google.com/file/d/1RRy-F6xHccULCGl6mBu4e-dbonfmM8Sb/view?usp=sharing
2) Set Media Properties Color Space to: Panasonic - V-Log - V-Gamut
3) Set Media Properties Color Range to: Full
4) Confirm Project Properties - this time Vegas has chosen settings: HDR Off. Change the settings to: HDR10, 32-bit floating point (full range), 1.000, Default (ACES2065-1), Rec. 2020 ST2084 1000 nits (ACES) (Vegas 21 Build 315 set these automatically)
5. Click on HDR button on Video Preview.
6. Note the Wave form shows the clip peaking around 500 nits (so far, so good).
7. Click on track Colour Grading icon
8. Set Color Wheels Gain Y to 0.999 (or any control in the color grading panel).
Defect: Waveform now clipped at 100 nits, video preview is over-exposed and washed out. VP21 Build 315 did not have this issue.
The only way to restore the image is to clip 'Undo' or disable the color grading plug-in. If you repeat the above steps but touch literally any control in the color grading panel (it does not have to be Gain Y), it will do literally the same thing. So, its completely unusable for me now in this latest build.
HDR grading not working in VP22 is something others have reported and apparently related to the video engine rebuild.