QTMovieLayer performance
QTMovieLayer performance
- Subject: QTMovieLayer performance
- From: Jeff Schindler <email@hidden>
- Date: Tue, 26 Oct 2010 09:38:05 -0400
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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