On each of my first two video tracks (V1 and V2), I have a simple PNG image. Both of them have motion effects (position and scale).
I want the upper half of the output video to show V1 and the lower half to show V2. How do I do this?
I've tried crop but this doesn't work, because the crop "moves along" with the image. I've also tried mask but I run into the same trouble.