FPS fluctuation when QC is in Focus

robbietherobot's picture

Here's a weird one. Just got a new MacMini (Late 2012) with onboard Intel HD graphics. Have noticed this also on a previous Mac Mini with an AMD graphics card but it's far less pronounced.

Basically my (fairly complicated) composition runs at 60 fps in full screen but every 3-5 seconds it drops to 45 fps for about 3 seconds then pops back up.

However I switch to the Finder or any other app with the file still running in Full Screen the frame rate stabilises to 60fps constantly.

Weirder still, if I open "Activity Monitor" and run the floating CPU panel and switch back to Quartz in full screen, it all works solidly at 60 fps without any problem.

Has anyone else spotted this/come up with a solution?! The issue is the same if I wrap it in an Xcode App. Only I can't float anything in front because it takes over the whole screen.

Any help would be much appreciated. Installing 15 of these in an exhibition in two weeks!

Ta. Rob

Mac Mini Processor 2.3 GHz Intel Core i7 4 GB 1600 MHz DDR3 Intel HD Graphics 4000 512 MB OS X 10.8.2 (12C2034)

Output Frame Rate

scalf's picture

I was wondering if there was a way to output the frame rate of a composition, such as to another computer or device via OSC.

When I pull up the fps patch, there are only inputs and no outs. Is there a way to get the fps number into some sort of output?