Hello,

We have a QTMovieLayer within a layer-backed view and are seeing stuttering 
issues when text is overlayed onto the video in another CALayer.  The stutter 
happens when we change the text in the text layer (we are cutting between 
different blocks of text while a single movie plays in the background) - we did 
some profiling in Instruments, and the CPU spikes at these transition times, 
with the vast majority of CPU during these spikes spent in QuickTime code.  We 
tried using the new QuickTime X options with QTMovie, but still see the 
stutter.  Are there particular optimizations that are lost when playing a movie 
in a layer?  Are there any particular settings or flags for the layers for 
optimum playback?  Thanks for any help.  BTW, we are mainly testing with H264 
movies (no audio), and are running on 10.6.4.

Jeff_______________________________________________

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