2 Add the clip you want to superimpose to any track higher than the track

2 add the clip you want to superimpose to any track

This preview shows page 370 - 372 out of 448 pages.

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. Be sure the superimposed clip overlaps the background clip in the Timeline panel. 3 In the Effects panel, click the triangle to expand the Video Effects bin and then click the triangle to expand the Keying bin. 4 Drag the Image Matte Key to the superimposed clip in the Timeline panel. 5 In the Timeline panel, select the superimposed clip. 6 In the Effect Controls panel, click the triangle to expand the Image Matte Key settings. 7 Click the Setup button , browse to the image being used as the matte, and then click Open to select the image. 8 (Optional) If you’re animating the Image 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.
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ADOBE PREMIERE PRO 2.0 User Guide 365 9 Click the Composite Using menu and choose one of the following: Matte Alpha Composites the clips using the alpha channel values of the image matte you selected in step 7. Matte Luma Composites the clips using the luminance values of the image matte you selected in step 7. 10 (Optional) Select the Reverse option to swap the areas that are opaque and transparent. 11 (Optional) If you’re animating the Image 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. Repeat this step as needed. You can also adjust the interpolation between keyframes by editing the keyframe graph. See also “About keyframes” on page 230 “About alpha channels and mattes” on page 354 “To edit keyframe graphs in the Effect Controls panel” on page 238 About the Difference Matte Key The Difference Matte Key creates transparency by comparing a specified still image with a specified clip and then eliminating areas in the clip that match those in the image. This key can be used to create special effects. Depending on the clip, it’s possible to use Difference Matte Key to key out a static background and replace it with another still or moving image. You can create the matte by saving a frame from a clip that shows the static background before the moving object enters the scene. For best results, neither the camera nor anything in the background should move. The following Difference Matte Key settings are adjusted in the Effect Controls panel: Similarity Broadens or reduces the range of color that will be made transparent. Higher values increase the range. Smoothing Specifies the amount of anti-aliasing (softening) that Adobe Premiere Pro applies to the boundary between transparent and opaque regions. Choose None to produce sharp edges, with no anti-aliasing. This option is useful when you want to preserve sharp lines, such as those in titles. Choose Low or High to produce different amounts of smoothing.
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