Green Screen Help...

[downtownbrown]

I have been reading every post I can find here about green screen settings and set up.

I've found that the sharpness is an issue so dialing the sharpness down helps.

I haven't particularly found any posting about where the camera should be physically set up from subject(I have talent standing on a green screen cyc approx. 10-12' from background). Should it be set up wide, tele and sweet spot of the lens(f-stop)...

Also any experience with shutter settings?

1080 vs. 720.

Are you guys doing a lot of work to remove halo(dark & white lines around subject foreground)...Is the issue lighting or sharpening or 4:2:2/combination...I've read several reasons but still not sure if I can get a good enough result shooting to p2 dvcpro or should consider capturing directly via bmd intensity via the component cables...

I'm sure you've all been down this road and this info is possibly already here but I am still unsure and was hoping some of you might have some answers to my ?'s...

Thanks in advance.

[Shooter]

There is so much needless mystery and questions about green screen (keying) .

Its not rocket science and you are correct .... Everything you ever need to know has been written and posted and documented a billion times.

Wide , tele or otherwise is up to you. General idea is make the fg fit with the bg but there are no rules.

Lens and f-stop sweet spots dont come into it very much apart from photographic considerations.

4:2:2 is good
720 or 1080 is good

Most important is good key lighting practice and it is very simple and well documented

Good key lighting practice should give you an image that keys immediately you apply the "effect" without resorting to any "fiddling around" with halos etc.

I am in the middle of a major keying project and the keys are working perfectly without any additional tweaking.

[Justyn]

He's right.. it's not too difficult... but it will require some tests. Just do your due dilligence and get to try things out in advance... Avoid shadows on the greenscreen, avoid hot spots.. get an even soft exposure over it all. add a rim light to your subject and try to match your lighting to your background composite if possible.


here's a great article to help you on your way:

http://generalspecialist.com/2006/10/greenscreen-and-bluescreen-checklist.asp