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perspective and green screen???
Hey everyone
I’m shooting a musicvideo with a band in front of a green screen. I just want to make shure that this is how I come around my problem: I want to be able to move the camera (pan, tilt and dolly) and still be able to put footage in the green screen area in the right perspective…
So can’t I just put 4 dots in a rectangle on the green screen, and then just use them to motion track the perspective in the motion tracker in AE 7??
Any good tips and ideas how to come around this?
– thanx, Rune
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3 Replies
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I think it’s a bit more complicated than that to get a good match, but with quick cuts in music video on-the-cheap I believe you’re doing what I would do. You want to make your dots a contrasting, keyable color… like red.
Good luck. Let us know how it comes out.
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[RuneMadsen] “I want to be able to move the camera (pan, tilt and dolly) and still be able to put footage in the green screen area in the right perspective…”
This really depends on what your backgrounds will be like. It depends on what’s in the shot, what lens you’re using, how much movement, the size of your subjects in the frame, the distance of your subjects from the background, and how “real” you want it to look. Your technique is capable of tracking only two dimensions, but the perspective within the shot is affected by 3 dimensions. For small movements it should look almost perfect, but say, for a long dolly shot the perspective will skew unless you shoot the backgrounds with the same dolly movement.
I’ve done this before with my foreground subject being quite large in the frame and it came out great. Depending on what you’re doing your results will vary. Let us know how it turns out.
Matt
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Hey everyone
Thanks for your replies…. it helped a lot… give me a couple of months and I post you a link 🙂
– Rune
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