Re: Stuttering Multiple QTMovieLayers in Single Window

FROM : David Duncan
DATE : Wed Apr 30 18:22:48 2008

On Apr 30, 2008, at 12:28 AM, Greg Sutton wrote:

> I have a single QTMovie with one video track playing well in a 
> QTMovieLayer within a window. In fact I can have three or more of 
> these windows open all playing separate videos without noticeable 
> slow down. However when I add a second QTMovieLayer to a single 
> window things start to fall apart. This happens whether or not the 
> QTMovieLayers are in the same layer tree.


In general, one layer tree should be more performant than multiple 
layer trees in a single window, as there are fixed costs for each root 
(basically an OpenGL context and the associated machinery for getting 
it drawn correctly). That the QTMovieLayer is causing you problems 
like this is a bug that you should file.
--
David Duncan
Apple DTS Animation and Printing
david.<email_removed>