1
Add the background clip to a track.
2
Add the clip you want to superimpose to any track higher than the track containing the
background clip. This is the clip revealed by the track matte.
3
On a third track, add the track matte clip. (If you need to add a third track, drag the
matte to the empty area in the Timeline window above the highest video track so that a
new track is automatically created.)
4
In the Effects window, expand the Video Effects bin and then the Keying bin, and drag
the Track Matte effect to the superimposed clip.
5
In the Effect Controls window, click the triangle next to the Track Matte name to expand
it.
6
For the Matte option, select the video track that contains the track matte.
7
In the Timeline window, hide the track containing the track matte by clicking the track’s
Eye icon.
8
Adjust other options as needed.
Composite Using
Select Matte Alpha to composite using the values in the alpha channel
of the track matte. Select Matte Luma to composite using the image’s luminance values
instead.
Using Help | Contents | Index Back 233
Adobe Premiere Pro Help Superimposing and Compositing
Using Help | Contents | Index Back 233
Reverse
Inverts the values of the track matte.
To retain the original colors in the superimposed clip, use a grayscale image for the
matte. Any color in the matte removes the same level of color from the superimposed
clip.
Creating a garbage matte
Sometimes the subject of a scene is properly keyed except for undesired objects. Use a
garbage matte
to mask out those objects.
The Garbage Matte keying effect provides four options that represent the X and Y pixel
coordinates of each corner of the garbage matte, measured from the top left corner of the
frame. Changes appear in the Preview view of the Monitor window.
The microphone (left) is masked out by repositioning image handles in the Preview view of the
Monitor window (center), creating a garbage matte that is then keyed and superimposed over a
background (right).
To create a garbage matte:
1
Place a clip in a track.
2
In the Effects window, expand the Keying bin, and drag the Garbage Matte effect to the
superimposed clip.
3
In the Effect Controls window, click the triangle next to the Garbage Matte name to
expand it.
4
Do one of the following:
•
Click the effect name to display the garbage matte handles in the Program view, and
drag the handles to shape the matte.
•
Use the Garbage Matte options to adjust the size and position of the garbage matte.
Creating a color matte
You can create a full-frame matte of a solid color that you can use as a clip. You can use
mattes, for example, as a solid background for titles.
To create a color matte:
1
Activate the Project window.
2
Choose File > New > Color Matte.
3
Select a color from the Color Picker window, and click OK.
