View Full Version : Chroma Key Problems
January 25th, 2007, 06:18 AM
Hi, i'm pretty much a novice to chroma keying, only a few months playing around with it. I'm currently using the Keylight plugin for After Effects and the problem i'm having is that the subject when still has greyish patches all over him. When this is rendered and the subject moves he starts to flash. Has anyone experienced this? Any help appreciated.
February 27th, 2007, 12:49 AM
plugins name ultra 2 award winner for chroma key
February 27th, 2007, 12:26 PM
you need to study a little bit about all the options in Keylight. There are tons of them, and when used properly, it's pretty much the most amazing keyer available! Read the keylight manual and play with the sliders as you read about them.
here's a half hour video tutorial i did using keylight. It mainly demonstrates a couple more advanced things (edge blurring and lightwrap), but it's the closest thing I've done thus far to a real keylight tutorial.
February 28th, 2007, 05:55 AM
Hi Hype, thanks for your advice. I'm getting more into keylight now. I've also bought a new camera as the one we was using wasn't really up to it. I'm still using dv but thats down to budget and we are getting better results already. I'll have a look at your video for some tips. Thanks again, dink
February 28th, 2007, 12:17 PM
there's also a trick you can do to remove DV aftifacting before keying, which involves converting your footage to YUV color space, blurring the green and blue channels, then converting back to RGB.
Here's a script that will do it automatically for you.
I wouldn't recommend using these preset keylight settings, but the channel blurring stuff works pretty well.
oh, this really isn't a script. just some preset effects.
February 28th, 2007, 06:18 PM
Thats sounds and looks awesome, only i can't get the preset to load in keylight? I've saved it in the preset dir in after effects but when i try to load it in animation preset within keylight i can't see it? Any ideas? Thanks a lot for the tips by the way you've been very helpful :)
February 28th, 2007, 07:14 PM
it's not a keylight fx setting, its an "animation preset"
just select your layer, go up under "animation" (i think), and select "browse animation presets". then navigate to the ffx file.
it automatically applies a convertor effect, a blur, another convertor, and a keylight effect with saved greenscreen settings.
I like it all except the default settings in the keylight effect it applies. I usually press reset on only that effect and pull my own key.
March 7th, 2007, 08:12 PM
i hope i can do those things hehehee i just started to learn AE :cowboy: