- Posts: 456
- Joined: Thu Sep 16, 2021 7:05 am
- Real Name: Cody Predum
Yeah you can delete keyframes and it will interpolate the transformation where keyframes are missing.
Here's a couple of examples in a comp.
In both examples the the source 'footage' is a moving black rectangle. In the first example, this movement is linear; in the second, it's eased via the default "smooth" operation that does an ease-out, ease-in.
Each example has an 'Original' Planar Transform, with all its keyframes, and a 'RemoveKF' Planar Transform, in which I've removed nearly all the keyframes. In the Linear example I removed all but the first and last keyframes, and in the Eased version I removed all but the first three and last three.
These Planar Transforms are then used to merge a red rectangle over the original black rectangle.
In the linear example, the RemoveKF Planar Transform has the red rectangle sticking to the black rectangle: it works even with only two keyframes because the movement is completely consistent and linear.
In the eased example, the red rectangle starts and ends in the right place, but slips off in the middle, because the few keyframes remaining aren't enough to follow the eased movement of the black rectangle.