T _ R _ A _ N _ S _ P _ A _ R _ E _ N _ C _ Y ___ &_ S _ U _ P _ E _R_ I _ M _ P _ O _ S _ I _ T _ I _ O _N _The Superimposition (or S1) track gives you the power to layer image upon image in your finished movie. We show you only one superimposition track, but Premiere allows you to add as many as 97 superimposition tracks. What you do with them is limited only by your imagination. Just think of having 97 images (or even just two images) superimposed on each other. Part of each image would need to be transparent so that one image does not simply overlap and block the other. Transparency settings give you the freedom to determine what parts of an image will be visible and which will be invisible. Superimposing titlesS Titles are the most common elements that use the Superimposition track. Try putting a title in an A or B Video track. The background color will be whatever you chose for the title, and there's no way to place a background image without covering over the title. Pretty boring and limited.
Place a title in the Superimposition track, select it, then pull down Clip -> Transparency. In the middle of the window is a pulldown menu called Key Type. Because you have a white background on your title, choose White Alpha Matte. Click on OK. Now using your scrubbing preview (take the mouse to the Time Ruler, it turns upside down, and then drag across the Construction Window), and you will see your title superimposed across your background image. Earlier we showed you how to create alpha channels in Photoshop. When you import images with custom-made alpha channels, Premiere notices marks the file accordingly in the Project Window. |
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| Double click on an alpha channel image and see how the Clip Window is a little different than other ones. You can choose to look at the RGB image or the alpha channel. | ||||||||||||
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| Place your alpha channel image in the superimposition track and pull down Clip -> Transparency. Choose the Alpha Channel Key Type. With the third box chosen from the left chosen under the preview image, you'll be able to see how the superimposition will look. Choose Reverse Key and the images switch: a strange blue-green boy-swan sitting on a merry-go-round on a cobblestone street! | ||||||||||||
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If you look at your titles in the Project Window, you will see that they are marked "alpha channel" as well. When you create titles, Premiere automatically creates the alpha channel for you, masking out everything but the title text. Using only White Alpha Matte and Alpha Channel as key types will let you do quite a bit with superimpositions. As your skills and interests grow, you'll learn what other effects the many other key types can offer. |
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Video fades Besides having the ability to be selectively transparent, images in the Superimposition tracks have the ability to be faded in just the same way as you learned to do with audio clips. At the beginning of "A Recipe," the title fades out right before the transition to the first image. Notice that under the bottom of the title clip in the superimposition track there is a fader line similar to your audio fader. As you move your mouse to the line it becomes a finger. Just as with your audio fade, make a point where you want your fade to occur and pull it down. Scrub preview and you can see the fade. |
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