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Looking to Chroma Key 2 times at once.
Okay, I’ll try my best to explain exactly what I’m trying to do. What I want to make is a clip where everything is represented by 2 different rainbow gradients. So, if you imagine a black and white line drawing only rather than being white the paper is a rainbow gradient running from the top left to the bottom right, and rather than being black the lines are a rainbow gradient running from the bottom left to the top right.
It seems to me that the best way to do this is to turn the original image into a 2-tone image (I’ve been using blue and red) with Gradient Map. Then use the Media Generator to create a rainbow gradient in the track below the original footage, and key out the blue. That gets half of it done, but the problem I’m having is then getting the other rainbow. If I key out the red, it just shows the same track as the blue and I end up with none of the original picture left. If I render and then use Chroma Key again, then the part of the rainbow that’s the same colour as the colour I’m using to Key becomes transparent.
There must be a way to accomplish this.
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1 Reply
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I’ve figured out one way to do it, but it’s not terribly elegant. First turn the clip black and white, then use the Chroma Keyer to replace the black with the gradient you want underneath the black. Render that out as a file. Then change the gradient for the one you want underneath the white and change the Key colour to white. Render that out as a file. There’s now one file that’s black and rainbow, and one that’s white and rainbow. Load both back in, layer them on top of each other, and use the Chroma Keyer to make the non-rainbow colour of the top clip transparent.
It’s doable like that, but I can’t help but think there’s a more elegant solution somewhere.
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