ADOBE PREMIERE PRO 2.0
User Guide
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2
Save this frame as an image file.
3
Place the video clip on a track in the Timeline panel.
4
In the Effects panel, expand the Video Effects bin and then the Keying bin.
5
Drag the Difference Matte effect to the video clip.
6
Click the Setup button
, browse to the frame you saved, and then click Open to select the image.
7
(Optional) If you’re animating the Difference Matte Key over time, make sure that the current-time indicator is
in the position you want. Click the Toggle Animation icons for the settings you adjust.
8
Select the Reverse option to invert the values of the matte and key out the static background.
9
Adjust the other settings as needed:
10
(Optional) If you’re animating the Difference Matte Key, move the current-time indicator either in the Effect
Controls panel or Timeline panel and change the Image Matte Key settings.
A new keyframe appears in the Effect Controls timeline when you change the settings. You can also adjust the inter-
polation between keyframes by editing the keyframe graph. Repeat this step as needed.
See also
“To export a still image” on page 380
“To edit keyframe graphs in the Effect Controls panel” on page 238
Using the Track Matte Key
The Track Matte Key reveals one clip (background clip) through another (superimposed clip), using a third file as a
matte that creates transparent areas in the superimposed clip. This effect requires two clips and a matte, each placed
on its own track. White areas in the matte are opaque in the superimposed clip, preventing underlying clips from
showing through. Black areas in the matte are transparent, and gray areas are partially transparent.
A matte containing motion is called a
traveling matte
or
moving matte
. This matte consists of either motion footage,
such as a green-screen silhouette, or a still image matte that has been animated. You can animate a still by applying
the Motion effect to the matte. If you animate a still image, consider making the matte frame size larger than the
project frame size so that the edges of the matte don’t come into view when you animate the matte.
Because the Track Matte Key can be applied to a video clip, the matte can change over time.
You can create mattes in various ways:
•
Use the Title panel to create text or shapes (grayscale only), save the title, and then import the file as your matte.
•
Apply the Chroma, RGB Difference, Difference Matte, Blue Screen, Green Screen, or Non Red Key to any clip and
then select the Mask Only option.
•
Use Adobe Illustrator or Adobe Photoshop to create a grayscale image and import it into Adobe Premiere Pro.