I'm working on a QTKit project in cocoa where the QT movie is taking up ~70% of the CPU load. I would like to move some of the processing load onto the GPU, if possible. Does anyone know if that is possible?
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On Snow Leopard, use
initWithAttributes:error:to create the QTMovie object, and include theQTMovieOpenForPlaybackAttributeattribute with a value ofYES. This will use QuickTime X to decode/play the movie, which, if possible, will play it with GPU acceleration.Be aware that this locks out a lot of functionality. You really do need to only be using the movie for playback. The QuickTime Kit Application Programming Guide has more information.