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Chroma Key and Effects part 2
my first post can be found here if your interested in catching up
https://forums.creativecow.net/readpost/8/1091366Anyway – I am using Boris Continuum PlugIn for FC… I am checking out how the chroma keyer works and still having issues getting a good key. I have a solid green screen with great lighting but still having issues for some reason.
Pictures are posted below so you have a visual of whats going on – First, I use preset greenscreen option… it leaves the backround choppy and brown – even after playing with the settings it looks like crap. Then, I tried the eyedropper, it does much better taking all the green out except for a section of the hair/head which leaves a weird aura-like stigma around it. When I adjust the settings I cant really get it to go away without the entire image fading/blending. What am I doing wrong? I have watched tutorials on this and have seen it done so effortlessly but can’t wrap my mind around what the problem is. Please help.
https://i309.photobucket.com/albums/kk366/mrgrey26/Screenshot2010-06-17at71826PM.png
https://i309.photobucket.com/albums/kk366/mrgrey26/Screenshot2010-06-17at71843PM.png
https://i309.photobucket.com/albums/kk366/mrgrey26/Screenshot2010-06-17at72329PM.png
https://i309.photobucket.com/albums/kk366/mrgrey26/Screenshot2010-06-17at72058PM.png
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5 Replies
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Not sure about Boris (We use Keylight 2.0 and this works great), but make sure your white and black mattes are set correctly in the screen matte function. The slightly adjust pre-blur or matte dilate to play with the edges.
FCP 6.06, OS 10.5.8 2x3GHZ Quad-Core Intel Xeon, Kona LHe, Dulce Duo-eSATA 8 Drive, 4TB Raid.
John Knapich
Creative Director/Partner
Assembypix.tv -
send me 1 full rez frame and i’ll see if i can key it.
send to jerryw@ktvt.com
i have trouble keying 4-2-0 video….4-2-2 is much easier.
i use keylight and DV Garage -
Andrew, I tried to help you in the other posting.
As I said, keying takes finess. You can watch some tuturials, and a lot of them will over simplify the process. I, like the others in this post, am not fully familiar with the boris keyer. BUT, I’m sure it has documentation that you can study for a while.
It took me nearly a year to be fully comfortable with all the settings in keylight.
Most settings adjustments are going to be very subtle, but the combination of all the tweaks will yield the results you’re hoping for.
I see you’re looking at a composite output mode in Boris. Is there one that is a screen matte? This will make your footage only black and white. Black would be your alpha channel, and white is all your footage that will NOT be keyed. Try to adjust the key using this view. When treated as a matte, you can clip white and black levels so the key comes out sharper.
You WILL need to finess your spill suppression as well. You’re using a very warm green screen, which means its going to bleed into his blonde hair.
So again, here’s my advice… take a huuuuuuge deep breath. Read some documentation on boris. Try an initial sampled pixel in several areas (close to the man). Finess dials/sliders. And work from a screen matte view.
4:2:0 is NOT hopeless for keying. HDV is NOT hopeless for keying. YOUR footage is NOT hopeless for keying.
Go for it!
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I appreciate your info… i started using dvMatte 1.5 and i still cant get it right but getting better ;/
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Andrew,
Which BCC filter or filters are you using?
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