The track matte key effect works with just about any type of moving video clip you choose to use as your matte image. You can layer any three video clips (stills or moving video) and use the track matte key to generate an animated or traveling matte key effect. To accomplish this technique, do the following:
or
note Matte keys work best when there is a clear distinction in the image's contrast. To improve the video's keying capability in Video Track 3, apply filters to adjust the contrast and brightness as well as turn it to grayscale. The result you get should show you the image that is in Video Track 2 with the white (or brighter) portions of the video in Video Track 3 (that shape). The areas that were black (or darker portions of the video) in Video Track 3 should hold the shape while displaying those portions of the video clip found in Video Track 1. |