Is there video editor that lets you *easily* move a 2:35:1 crop in a 16:9 picture? For example, in one part of a scene, I'm fine with the typical 2.35:1 crop; i.e., 131.5 pixels off the top, 131.5 pixels off the bottom. But in another part of the scene, I'd prefer, say, 200 pixels off the...