I've been trying to work with Roto Brush and on a 8-second clip and it's painfully slow (about 4-5 seconds to propagate between individual frames). Adding and subtracting to the mattes take a fair amount of time to refresh too; all said and done I might as well have just painted mattes by hand.
Is this normal? The demos make it looks so quick and simple...
I'm on a fairly decent machine (Windows 8.1 64-bit, 8-core Xeon, 64GB RAM). Looking at the task manager it seems it's only using one CPU core while working, but it's not even maxing out that core.
Thanks for any insight/tips!
That's just how it works. Traditionally, AE can only use 1 thread/core for most temporal operations since they need to be handled linearly and in sequence. Equally traditionally Xeons have a smaller per-core efficiency since they are aimed at parallel processing more than peak performance with TurboBoost as a core(X)i would. Simply not an ideal combination.