I also turned on 'Use YUV Texturing if available' as this seemed
to improve frame rate (as reported by the Viewer) so long as
texturing is set to 2D. What is tis doing and should I have the
bottom setting for 'Texture Parameters' set to Bilinear
(currently set to None)?
Using 2D texturing instead of Rectangle will resize the source
video images to have power-of-two dimensions, so you shouldn't do
that
Other texture parameters will have no performance effect
Ok, but the YUV texturing option makes a big difference to the
frame rate so there is somehting going on here. It seems I'm not
going to achieve a true overlay with DVCPRO HD using QC, even with
the comp being this simple and all the settings correct, its still
jerky and blurry. I have an X800XT graphics card, 4GB RAM, Dual G5
2.0 and this can't get a clean playback so its not a machine
specific issue.
Sorry, I meant to say YUV texturing is indeed an option that should
be on, and RECTANGLE texture, but the rest won't affect performance
Also leave dimensions to 0x0
________________________________________________________
Pierre-Olivier Latour email@hidden
Quartz Composer Team Apple Computer, Inc.
