primalair

Hi there
I'm usually over at tony. But now I've a annoying problem while watching movies, for example 720p mp4, in Quicklook (VTDecoderXPCService) and till now nobody could help... Randomly I see some "black frames" and I've absolutely no idea why. I had this problem before with my Hack as I ran with iMac12.2 SysDev. Activating my HD4000 in addition to my GTX670 fixed that Problem for me. But at this moment I'm running on Mac pro 3.1 because of the popping audio and other energy-management problems i had with iMac12.2.

Opening the same movie in Quicktime or iTunes does not show the black frames. I also didn't found any hint in the logfiles.

Any ideas?
Thanks and greets from Switzerland
Marcel