Hi Gang.
Has anyone tried pulling keys on cineon sequences before? I'm using after effects to pull a difficult key on a house explosion we shot. The house is a scale model and has been shot at the same angle of the back plate, which is footage of the real house. The miniature and background of the plate I'm keying have been painted Chroma Blue except for the windows and doors, which blow out in the explosion.
The question is, should I apply a cineon converter to the footage before I pull the key, or apply the converter to an adjustment layer and then pull? I think if we ever do this type of thing again, we will use black instead of blue. The fire gets so bright, the blues change dramatically.
Thanks, August
Has anyone tried pulling keys on cineon sequences before? I'm using after effects to pull a difficult key on a house explosion we shot. The house is a scale model and has been shot at the same angle of the back plate, which is footage of the real house. The miniature and background of the plate I'm keying have been painted Chroma Blue except for the windows and doors, which blow out in the explosion.
The question is, should I apply a cineon converter to the footage before I pull the key, or apply the converter to an adjustment layer and then pull? I think if we ever do this type of thing again, we will use black instead of blue. The fire gets so bright, the blues change dramatically.
Thanks, August
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Los Angeles
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Re: Chroma Keying Cineon Files
Sun, January 23, 2005 - 3:58 PMYou should try posting a frame of it somewhere, hard to suggest anything without seeing what the problems are. You should do your key in linear color space as the keyers seem to be designed to work in that format.
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Re: Chroma Keying Cineon Files
Sat, April 16, 2005 - 10:44 AMYes.. I've always keyed greenscreens and the like on the base cineon files. I often use a monitor LUT instead of loglin LUT for keying. But yes, usually if you shoot fire and explosions, you'd build a black box model of the object you're destroying. But now that this answer is four months old, I'm sure you've figured it out by now. ;) -
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Re: Chroma Keying Cineon Files
Tue, June 14, 2005 - 10:20 AMLOL yeah I figured it out. when we shot the house the pyro guys were saying over and over again how we should be using black, but my vfx supervisor insisted that we used blue to compensate for the debris. well, when the explosion hit, it of course changed the blue to 40 different shades of blue and purple throughout the footage. I told him if we ever did another pyro on blue I was just going to have to kill him. I also found a good cineon forum, btw: www.cineon.com/forums/viewforum.php
Cheers, thanks alot.
August
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