I have found a bug in the opacity of clips. I have the same clip being stacked three layers deap, intent is to use a 9x16 in a 16x9 video frame. I have the main video in Track V1, and in Track V2 I have a mirrored video, that I apply a blur and reduce the opacity to 20% to fill the rest of the screen.
The source clip is a ProRes 422 HQ video, REC 709
The error is a lower than expected opacity on the video used on the right of this screen capture:
The video on the right 1/2 of the screen happens to be in V2, but if I move it to V3 or V4 (and leave V2 black same condition exists).
However if I move V1 track to the top of the stack, the opacity is correct for all layers.
This is the settngs for the Opacity of the clips in question:
If I try to crop out the main center video on the right hand part of the clip, expecting it to effect the clip below differently so the reduced opacity is not visable, it crops the video as if there is no extra black footage to the right (I hope that make sense) - basicaly it does what is expected, and crops the visable part of the video and there is no extra pixels to the right that may be causing the transparency issue.
Additional observation is that when I play around with the clips placement on the video track, I notice that the clip that is on the left hand 1/3 of the screen, affects the opacity of the video clip on the right 1/3 of the screen. It can be demonstrated by turning off the video layer:
With the video layer on:
And now I turn off the video layer on the left side of the screen and you will see the right hand 1/3 video appear brighter with no intervention:
Attempting to crop the video on the left, has no effect on the opacity of the clip on the right 1/3 side of the screen.
This is Beta Version 25.4 Build 83, Windows 11 Pro for Workstations 24H2, Studio Diver nvidia 576.80 if that is needed.
My work around was to change the layer for now.
1 Correct answer
Often opacity issues can be cured by turning off 'composite in linear colour' in the sequence settings.
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I wrote a nice response out to you, and the forum dumped it when I hit submit (it errored with "idea not found" and deleted my post), so this one will be shorter.
Before @Richard M Knight pointed out Linear color setting, (which solved it), I tested it without the BCC effect, and same result. I also tested with version 24.3 and it also did the exact same.
Enabling Linear Color solved the issue in both the 24.4 Built 83 and 24.3 versions of premier, works flawless.
I never noticed this issue before, and I use this treatment often.
Also; this project was never rendered for preview, does it make sense that a setting grouped in the previews would have this effect on a project that was not rendered for previews? that seems like the incorrect place to put that...
Also, no frustration on this, minor issue, but thank you for the empathy none the less.
@jamieclarke Okay, wow - didnt see this comming as a solution - but you solved it by putting me into the right place with this.
I had this off by default, and the issue was present:
But turnign in on and the problem goes away:
However, this is listed in the preview section, I am not building previews, this is all viewed without a rendering of preview files.... not sure how a setting that seems tied to preview generation is effecting the clips in this way.
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