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Using a separate file as Alpha

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Chad Tate
Using a separate file as Alpha
on Oct 26, 2005 at 4:26:16 pm

Ok, I have tried alot of stuff, and cannot get this to work. I want to use a quicktime movie as the alpha channel for another quicktime movie. Sounds easy enough, but I cannot find how to do it with Boris Red. I can do it very easy in AE, but can't for the life of me figure out how in Boris Red.


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Chad Tate
Re: Using a separate file as Alpha
on Oct 26, 2005 at 4:57:54 pm

Found my answer. I was trying to put a video clip in a luma key effect, but you have to do it backwards. Drag the Alpha Clip to the Mask of the desired Clip. Apply Luma Key effect to Alpha Clip, adjust clipping to you liking.


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mark harvey
Re: Using a separate file as Alpha
on Oct 26, 2005 at 6:34:47 pm

Chad, you got it, except, try using the make alpha key filter instead of the luminance key....that is what it is made for.

HTH

Mark


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Chad Tate
Re: Using a separate file as Alpha
on Oct 26, 2005 at 7:47:51 pm

Thanks a ton! I knew there had to be something. I knew Boris wouldn't miss something like that, but they sure did make it hard to find.



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