What I'm trying to achieve is to be able to specify a image size, by pixel count, of a clip within a sequence. Say my sequence is 1920x1080, and I have a clip which is 1280x720. Suppose I want to put that clip into the sequence, scaled to exactly 960x540.
The only way I found to get there is to scale the image to 150% in the Basic Motion area, and then adjust the Distort slider to -100.
a) I don't understand the math FCP is using;
b) I only got to those numbers by visually playing around with the frame until i got to what I wanted, then stepping into the motion tab and seeing what I was close to, and then rounding to the next logical number.
That seems backwards. It seems like I ought to be able to just type in the dimensions at which I want FCP to display the clip.