CyberLink PowerDirector is my video editor of choice. Great product! (Sadly, like all software these days, it’s lightly documented.) I just figured out an interesting way to do green screen without having the green screen cover the entire frame.
That sure makes things easier. I did the ham radio videos using green screen. I took video of myself in front of a green screen that completely covered the frame. Then I substituted a photo for a background. I was hampered by the size and shape of the old movie screen I used to hold up the green cloth. This meant I really had to zoom in, which put me sitting very close to the green screen. And green light reflected from the cloth into my hair and coat, making it difficult to set the green screen controls right.
But! There’s an easier way! Take your shots of whatever you want to superimpose on something else with enough green screen to cover just that subject. Then, when you use Modify, you can create a mask that homes in on the green (and your subject), then go set the chroma key, and voila! you have your subject superimposed on the backdrop. Here are a few screen shots to illustrate how this is done.
Note that what you’re doing is using a mask. You are not changing the size or shape of the video with the green screen in it. You’re just masking out the part you don’t want.
The example isn’t the world’s best video. I shot it quickly to illustrate the concept. In this next picture, you can see the result.
True, not Oscar-winning material, but it illustrates the concept nicely and shows that you can do green screen without needing giant green backdrops. Note that you don’t have to use a rectangle as a mask—other options are available. Experiment!