Hi Christian,
if you're capturing your live video at max resolution, you should try to reduce the resolution ... Capturing dv via firewire at full res pretty much maxes out my cpu, which is a p4 running at 2.6gigs (gem 0.90.1 on win2k). remember that we're talking about more than 3mbytes per second that need to get into you computer first and then onto your graphics card. Lowering the resolution to dv_quarter leaves me with about 20 percent cpu usage (and some spikes every now and then), which is quality-wise a trade-off I can live with. appearantly, the process of getting those data into the vram is much more optimised when running gem on recent macs. a while ago, someone stated on this list that displaying two hd-streams simultanously (1080i each) left a lot of cpu power unused on this platform.
hope this helps, thoralf.
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