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Old 01-15-2008, 09:07 PM   #1
tdtinker
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Default ChromaKey Help?

We have several clips that we have shot in our studio, with a chroma-key green wall. We are using edius to key-out the back ground. We are have a hard time getting a clean key. Is there any tutorials on this? We have done this before, but today and with these clips it is a problem.
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Old 01-15-2008, 11:00 PM   #2
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There is in fact a tutorial here: http://ediustraining.grassvalley.com/index.php

Under the "6. Effects" section, video 6.1 explains it pretty well, and even goes in to how to finesse a better keying using the various tools within the Chromakey effect palette. Though the EDIUS GUI in this video is still for EDIUS 4.0, the location of each tool and the usage remains the same.
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Old 01-15-2008, 11:35 PM   #3
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lighting is important

if using a green background, use a magenta backlight to shine onto the back of suject without spilling any of that light onto the screen, this will give you a super clean key

here is how I usually key
http://www.videoproductions.com.au/h...chromakey.html
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Old 01-16-2008, 05:17 PM   #4
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Oh, it will be helpfull.

And if the background is blue, what color choose for the backlight ?

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Old 01-16-2008, 05:22 PM   #5
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After the fact you can try and use some of the tools to help make the key better.

You can use the soft edge to try and make the key a little better... also you have the Range and Power features that help bring the other colors back to as close to the original shot that can help with cleaning it up also.


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Old 01-16-2008, 05:23 PM   #6
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Quote:
Originally Posted by Marc44 View Post
Oh, it will be helpfull.

And if the background is blue, what color choose for the backlight ?

Marc
If I remember correctly yellow. This will neutralize the blue spill. I think you can also gel the kicker.
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Last edited by SRsupport; 01-16-2008 at 05:29 PM.
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Old 01-16-2008, 05:41 PM   #7
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Quote:
Under the "6. Effects" section, video 6.1 explains it pretty well, and even goes in to how to finesse a better keying using the various tools within the Chromakey effect palette. Though the EDIUS GUI in this video is still for EDIUS 4.0, the location of each tool and the usage remains the same.
Doesn't really give enough detail on the different tools in the chromakeyer. Is there something more in depth or is it just trial and error? What is CG mode, liner canelcolor, cutout line and cut out frame.
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Old 01-16-2008, 05:44 PM   #8
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Quote:
Originally Posted by tdtinker View Post
We have several clips that we have shot in our studio, with a chroma-key green wall. We are using edius to key-out the back ground. We are have a hard time getting a clean key. Is there any tutorials on this? We have done this before, but today and with these clips it is a problem.
tdtinker
What if you upload 3 sec of footage for me somewhere and I'll run it here and give you the settings to get a clean key?
Would that work?

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Old 01-16-2008, 06:07 PM   #9
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I have sent you a private message.
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Old 01-16-2008, 06:58 PM   #10
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Quote:
Originally Posted by SRsupport View Post
If I remember correctly yellow. This will neutralize the blue spill. I think you can also gel the kicker.
Thanks, Sr
What want you to say by : gel the kicker

Marc
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