If you’re using Avid’s new DX hardware (Nitris or Mojo), then you’ve probably been using “Fast Scrub,” perhaps without knowing it. This is a slick new feature that makes the timeline more responsive, by dramatically improving the number of frames displayed as you drag. Fast Scrub offers some of the smoothest timeline performance in the business — so smooth that you can often check your work just by dragging through it. It also improves audio responsiveness, especially if you keep the caps lock key down. (I don’t, but I know many of you do.) If you’re using DX hardware you’ll find it in Timeline settings. It’s turned on by default.

But if you like to leave waveforms on — and I can’t work any other way now — then Fast Scrub will make you crazy. Why? Because it causes waveforms to redraw much too frequently, even when you are just manipulating video. If you simply move a video clip in segment mode — with no change to any audio — all your waveforms, for your entire timeline, will slowly redraw, during which time you can’t do anything but wait. Many other seemingly innocuous things will also trigger a redraw. Undo will usually do it, for example. I’ve even seen redraws after simply changing a clip name in a bin.
With a fast CPU, waveform display in the Media Composer has become very usable (and waveforms in MC have always been much more detailed than in FCP). But with Fast Scrub you have to turn waveforms off, or keep a straight jacket handy.
Okay, so why not just disable Fast Scrub, itself? Timeline dragging is plenty responsive with software-only systems or even with Adrenaline, so turning it off shouldn’t be a big deal. Unfortunately, with the DX hardware and Fast Scrub off, timeline dragging goes back to the way it was before version 3 — very slow. So you’re damned either way.
Caught between a rock and a hard place, I’ve had Fast Scrub off for a week or so now, and I’m getting used to it. But I sure wish the timeline could be as responsive as it is on my laptop at home.
Recent Comments