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View Poll Results: for green/blue screen you use ...
edius filter 27 84.38%
after effect with no plugin 4 12.50%
after effect and some Primatte plugin 1 3.13%
what is kromakey ? 0 0%
Voters: 32. You may not vote on this poll

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Old 12-17-2008, 12:52 AM   #1
opensource
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Default chroma keying, blue/green screen, need advice

hello everybody,
I started in the advanced chroma keying.
I try to reach the proper setting, but the edges (in blue) will make me crazy.
Do you have any advice with Edius chromakey filters?

ps : My English is bad, but the blue screen and the actor are well (3 point) Lighting ...

Last edited by opensource; 12-17-2008 at 01:07 AM.
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Old 12-17-2008, 02:05 AM   #2
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Proper lighting for chromakey is crucial for a proper key.
A light magenta light from behind generally gives a snappy key on green screen.
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Old 12-17-2008, 05:09 AM   #3
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Source also plays a major part. DV/HDV footage is a bit harder to key than lets say DVCPRO50 or DVCPROHD footage.

Always light the green/blue screen as well. Do tests on the spot, key it. It's all based on trial and error.

EDIUS does good chromakeying for a real time solution. If you want to through a compositor such as After Effects, you will obviously have more control with spill suppresion, feathering, choking or whatnot. You don't really need to buy the Primatte plugin for AE, just use Keylight that comes with AE. It does a decent job. Mix a matte choker in there and you're good to go.
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Old 12-17-2008, 07:00 AM   #4
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here are my rules:

1. when using blue screen, always light with blue gels over the redheads and balance for daylight, this will kill 99% of your problems, or use a backlight on the subject with a yellow gel

2. when using green screen, always light with 3200k redhead, this will kill 99% of your problems, or use a backlight on the subject with a magenta gel

also, fine tune as seen here
http://www.videoproductions.com.au/h...chromakey.html
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Old 12-17-2008, 12:37 PM   #5
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If you're using miniDV footage, that is about the worst thing (other than VHS or Hi-8, lol) that you could try to key. HOWEVER, I successfully pull great keys all the time with Ultra2. Unfortunately it is not sold individually any more, as Adobe now only sells it with the Suite. However, I see new and used copies floating around on eBay all the time.

For everything else, I use After Effects Keylight or a combination. Edius is good for quick keys and those that are going to be scaled down to hide the imperfections. I would never use Edius to key anything that was important or supposed to look professional. It is possible I suppose with the right footage and one heck of well lit scene and screen.

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PS> Another GREAT feature with Ultra2 is that you can have a live preview of your key and therefore make needed corrections to your lighting before you capture your video. Can't beat that!
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Old 12-17-2008, 02:49 PM   #6
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Horses for courses! I think Edius is one of the best chroma keyers around and certainly outshines Ultra - I've used both for ages with a regular half hour television show.
I can understand your comments with NTSC DV and its 4.1.1 colour space but PAL DV 4.2.0 is predominantly green and great for keying.
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Old 12-17-2008, 06:44 PM   #7
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As Anton has posted it is all in the Lighting.
I also pull sharp clean keys on material shot on dvcam.
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Old 12-17-2008, 06:54 PM   #8
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I think Edius has a decent keyer, but I find it needs some edge controls for my taste.

If they had some more adjustments it would be the best option as it is real-time and so easy to preview.

But until Edius gets a proper alpha export option, it is tough to deliver the key to another person.
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Old 12-17-2008, 11:59 PM   #9
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Quote:
Originally Posted by Bassman View Post
I think Edius has a decent keyer, but I find it needs some edge controls for my taste.

If they had some more adjustments it would be the best option as it is real-time and so easy to preview.

But until Edius gets a proper alpha export option, it is tough to deliver the key to another person.
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Old 05-04-2009, 06:20 PM   #10
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Quote:
Originally Posted by antonsvideo View Post
here are my rules:
2. when using green screen, always light with 3200k redhead, this will kill 99% of your problems, or use a backlight on the subject with a magenta gel

also, fine tune as seen here
http://www.videoproductions.com.au/h...chromakey.html
I used 4 3200k redheads to light the green screen but no magenta gel with the backlight. It's DVCPro HD 720/25p footage. I'm still trying to improve the picture and to get rid of the spill. To be honest - I was somewhat disappointed to have this spill. Best results till now using the shape picker (better than the cancel color slider). See pictures: default and shape2.

Any suggestions to further improve the picture and/or future greenscreen shootings?
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