Compositing Image Sequences in Final Cut Pro
Place two video tracks, one over the other, in the timeline and click the Clip Overlays button in the bottom left of the timeline window to activate it.
You will see a rubber band towards the top of your video clips in your sequence. Click and drag downward the rubber band, which looks like a dark line, in the top video clip to change the opacity of the clip.
Now the clip beneath it can be seen through the image. Control click or right click the top video clip and highlight the Composite Mode option from the menu and a list will appear. experiment with these settings until you find the one that best suites your needs. As long as you keep the locator bar parked over the stacked clips in the timeline you will be able to see the changes you make in the Canvas Window.
Check out RED 3GL for Titling Compositing and Effects.
