I am trying to create some funny videos where I am taking faces (heads) of people in my family and attach them to a different body. Can this be done in Motion 5 or FCPX? If it can, do I use keyframes, match moves or what? I understand a 4 point match move but wouldn't this have to be done with 2 points?
Thanks in advance.
I *know* there are those who would argue with me, but I find the absolute fastest way to "match move" is to manually keyframe.
Take your image overlay (some else's face) and place it over the face to replace. You might want to send the Properties > Blend > Mode to overlay or set the Opacity down about 50% to help you line things up.
Set a Position keyframe (the keyframe to the right of the word Position -- that will set all 3 x,y, and z positions at once.) It's the only keyframe you need to manually set.
Use Shift - right arrow key to advance the playhead by 10 frames at a time (you can fine tune the "interkey" motion later.)
Simply drag the overlay image to the new position.
Repeat until you get at the end.
Any frame the motion goes off too much, make a minor adjustment to the position of the overlay -- the new keyframe will be added. (It really is as simple as dragging the picture around on the canvas.)
Continue until done. Turn the Opacity back up or reset the Blend Mode to Normal.
Once you get the basic motion down, you can go back and keyframe Scale and Rotation if you like.
It's a very fast workflow. It beats trying to get Motion's match move to work from frame 1 to the end without going off the rails somewhere (say, if your person in the video turns their head and the tracker is "lost".)
You can use this exact same technique in FCPX (keyframe the overlay position in the Tranform pane. Also, there are no trackers in FCPX.)
Maybe some else will have some tips on how to get the Motion trackers to shortcut this technique. [One way might be to ramp up the contrast on the original until after the tracker was finished, then turn the contrast back off again, but it really still depends on the footage.]