Setting Up the Keyer

Before you start keying, you import the front and back clips, apply a Keyer operator to the front clip, and adjust the Keyer setup options. You can also set up the viewports to display the Keyer, the matte, the composite, or all three.

If you are keying an uneven blue or green screen, you can apply filters to correct the blue screen, and then apply the Keyer, or use another operator as a key-in source. In this case, the transparency of the front clip is based on the matte created by keying the second key-in source.

For information on loading clips, see Importing Footage.

For information on working with uneven blue screens, see Keying Uneven Blue Screens.

You can also key a clip without building a composite, for example, to generate a matte for use in another branch or another composite. To do so, choose File | Open, select the clip that you want to key, and choose Discreet Keyer in the Open Footage dialog that appears. You can also add a Keyer operator to a branch in the Schematic view. For information on using an external matte, see Image Channels.