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alpha channels in Boris Red

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lilah_rose
alpha channels in Boris Red
on May 11, 2005 at 4:40:27 pm

I am new to Boris Red and I am having trouble rendering out an alpha channel to be used in Avid Media Composer Adrenaline. I am using the Red Engine (standalone) so that I can render out a movie file to import and manipulate in MCA without having to re-render everytime I change something. The problem is, when I render out a movie from Red and import it into MCA, I can't get the alpha channel to work. I have tried all of the render setting options for alpha channels within Red and I have tried all the different import settings in MCA. Any ideas what is wrong?

lilah


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stephenlnoe
Re: alpha channels in Boris Red
on May 12, 2005 at 1:36:09 am

did you export to MOV using the anamiation compression and the millions + color space? the + is the alpha channel, if it isn't selected there is no alpha channel. Also, make sure there literally is a transparent backgroud by closing the 'eye' on any underlying track. I usually select the checkerboard for transparency to make sure there is a transparent background before I ever start. These settings always work for my premiere station. For my Liquid edition editing suite I use the TGA seqence which will work no matter what (in any NLE i've ever used).

Good luck...


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Editz
Re: alpha channels in Boris Red
on May 12, 2005 at 3:59:41 pm

Ditto on the previous post. When you see checkerboard, that's the area the Avid will key through. Make sure you select "Invert Existing" on MC when importing your movie.


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lilah_rose
Re: alpha channels in Boris Red
on May 18, 2005 at 3:58:43 pm

Thanks for all the input. I was using Boris as a standalone, not within MCA. But once I opened the effect in MCA and "exported" (vs. render) as a targa sequence, it worked just fine. Now I'm having a different problem, though, so I will make a new post so it actually gets read :)

lilah


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