How to use Quartz Composer as a video effect?

Hello everybody,
I recorded a movie with my iSight camera. And now I want to apply a Quartz Composer effect that I created. I put the Quicktime Movie in the same folder as the .qtc file and imported it via the "Movie Loader". Thats works fine in the Quartz Composer Preview window.
But everytime I exported it from Quartz Composer as a Quicktime movie, the place where the movie is, is just white. No movie.
I tried to open the .qtz file in Quicktime, but I got the same result.
What settings do I have to make, to make sure my movie is exported to Quicktime?
I'm quite new to Quartz Composer, but I hope somebody can help me.
Thank you very much,
Jan
Message was edited by: Jan Riggert
Message was edited by: Jan Riggert

You'll want to use Core Video which is technically part of QC and yes I do believe you can apply QC filters to video clips using Core Video.
Apple's Guide to Core Video is here: http://developer.apple.com/documentation/GraphicsImaging/Conceptual/CoreVideo/CV ProgIntro/chapter_1_section1.html
There are also Core Video examples in the Developer Example code folder in the Quartz folder.
Hope that helps,
=Tod

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