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Need fullSpeed Video on a Layer

My App has hit a performance bottleneck that I haven't been able to get around. I have tried the app based on the 'Performer' sample code, but hit problems I think due to thread issues and quicktime.  And also just using a timer in the main even loop, and also a simple CALayer, But nothing can play a fullscreen movie at full speed. Is there some codec in particular that I should use that would blend nicely in CALayers?  

I have a very simple app that just does this in the awakefrom nib

[mainView setWantsLayer:YES];
[mainView setLayer:[QCCompositionLayer  compositionLayerWithFile:@"/intro.qtz"]];


and the qtz file just has the movie going straight onto a billboard.

Quicktime can play the movie without a hiccup, but it runs like a pig inside these frameworks.  I don't know how to simplify it anymore.

Any clues most welcome.


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