Overall memory bytes limited?

I'm creating a video editing program with QTKit.

There is a sample program provided by apple here, http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/QTKitApplicationTutorial/CreatingaQTKitStoporStillMotionApplication/CreatingaQTKitStoporStillMotionApplication.html

My test program is based on this program, but use

QTMovie *movie = [[[QTMovie alloc] initToWrita开发者_运维百科bleFile:@"foo.mov" error:nil] autorelease];

and

[movie updateMovieFile];

for saving memories.

If there are not so many frames, the program runs well. But with so many frames, the program begins to show

QTKitServer(5618,0xa0924540) malloc: *** mmap(size=33554432) failed (error code=12) *** error: can't allocate region *** set a breakpoint in malloc_error_break to debug

I checked memory leaks with Instruments,

but Live Bytes are not so big and found no memory leaks. Overall Bytes is really big but is this a reason of this problem?

Any ideas will be appreciated.

Thanks,

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The overall bytes should not be a problem unless there is an unreported memory leak.

After some googling some people seem to get this problem when compiling for 32bit, what architecture are you compiling against?