After Effects Preview only works in certain (strange) situations.
by John Mahaffey on Dec 22, 2015 at 8:36:41 pm
I am having a very strange issue with After Effects that I have never seen before. When I try to preview my composition (and the render bar is ALL GREEN) it is choppy, and usually no higher than half the frame rate of the comp.
The strange part is that it will play perfectly if I close my timeline window.
It will also play perfectly if I zoom in on the timeline as far as it will go and I allow the play head to continue off screen (further down the timeline).