Replacing Green Screen
WHAT IS A GREEN SCREEN?
The Sandbox studios have pull-down green backdrops and walls painted green. If you film in front of themm you can replace the backdrop in iMovie with anything you want - a PowerPoint slide, another video clip, a photograph - the choice is yours!
Replacing the green screen in your video:
1. Record your content in front of a green background; it should be solid and evenly lit. Make sure the green background covers all of the background in the shot:
2. Download your footage onto a computer and import the footage into iMovie. Create a new video.
3. Choose a background (still image or video): Use the built-in Content Library, or import your own.
4. In the bottom left of iMovie, click on the header “Content Library”, choose a background, drag and drop that background onto the main timeline:
5. Select the clip you want in the front, and drag and drop it into the main timeline, above the background you have chosen.
6. Extend the background to match the length of the “front” clip:
6. Select “Adjust” in the top right hand corner of iMovie. Click the “Video Overlay Settings” button and change “Cutaway” to “Green/Blue Screen”:
7. Use the Softness slider and the Clean-up tools to perfect the image, play around with them to see what they do and how they work. Remember to undo your changes if you don’t like an effect (Command-Z):
