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Need help auto sizing a movie during playback.
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Need help auto sizing a movie during playback.

Hello,

I have a QT 7 Carbon application that uses GWorlds to get access to each frame of a movie in real time. It uses MovieTask() to play the movie and SetMovieDrawingCompleteProc() to recognize when each frame is ready. I'm running into CPU limitations when I process 1920x1080 sized images. SD video works fine.

Without totally restructuring my application, is there a way to have the standard QT mechanism scale my image before it passes it to me so that I receive a 1/4 sized image directly in my GWorld. Currently, when my application scales the image itself, the CPU has to process the full image twice, once to read it to my GWorld and once by my application to scale it with CopyBits(). I am hoping that there is a direct way to have the initial acquisition of the image return to me the properly scaled image. I can't switch to a newer Apple QT technology quite yet so I am looking for a solution compatible with my current implementation.

If possible, I do not want to go the bottleproc approach to get the speed I need.

Thanks,

--
Jeff Schriebman    http://www.ccaption.com    415-499-5609
Captioning solutions for video editing and streaming media
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