Comments

cpc000cpc wrote on 4/16/2013, 7:17 PM

kamshing,

I'm not sure what you want to achieve. The usual application of chroma key is to place subjects against an alternate background eg (from http://www.mediacollege.com/video/special-effects/green-screen/):

If you are, in addition, using a mask are you wanting to see some of the green screen rather than the background or do you want to remove say one of the people from the foreground? If the latter you can do this:

A second copy of the background is placed in front (lower track) and a black and white mask is inserted and given 'alpha' chroma key. Where the mask is white you see what is in front (the copy of the background). Where the mask is black you see whatever is in back (your original people with green screen + background pair).

For a still image I could paint out the woman with green but that would be difficult to do with a video clip!

Hope this helps,

Carl

 

 

 

johnebaker wrote on 4/17/2013, 1:15 AM

Hi

Also look at these questions and answers for another member of the forum who has asked several questions on this topic.

http://www.magix.info/uk/effects.knowledge.885467.html

http://www.magix.info/uk/this-effect.knowledge.861611.html

http://www.magix.info/uk/title-effect.knowledge.933429.html

John

Last changed by johnebaker on 4/17/2013, 1:25 AM, changed a total of 2 times.

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kamshing wrote on 4/21/2013, 7:08 PM

Thanks

kamshing,

I'm not sure what you want to achieve. The usual application of chroma key is to place subjects against an alternate background eg (from http://www.mediacollege.com/video/special-effects/green-screen/):

If you are, in addition, using a mask are you wanting to see some of the green screen rather than the background or do you want to remove say one of the people from the foreground? If the latter you can do this:

A second copy of the background is placed in front (lower track) and a black and white mask is inserted and given 'alpha' chroma key. Where the mask is white you see what is in front (the copy of the background). Where the mask is black you see whatever is in back (your original people with green screen + background pair).

For a still image I could paint out the woman with green but that would be difficult to do with a video clip!

Hope this helps,

Carl