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Things to Remember


Things to Remember

We started with the Track Matte Key, a revised powerful effect in Premiere Pro's arsenal. Because you can use alpha channel information to matte out elements, there is no resolution compromise when you output and render your final results.

When creating your track matte graphic elements, remember that the Matte Luma setting of Composite Using composites through pure white and can be used with gradients fading to complete transparency to have a smooth matte key. If you want to key through the black information of a clip without an alpha, check the Reverse option to composite through the black using luma. With Matte Alpha, Premiere Pro composites through the nontransparent alpha channel information of your media. With titles and Photoshop files, their empty space is not considered the alpha channel; instead the graphic and object within the frame will be attributed to the alpha channel.

Using the method of double-laying clips, you can use Track Matte Key effects to create powerful color correction and image effect. If you haven't yet read Chapter 23, "Advanced Color Correction: Three-Way Color Corrector," check out the Secondary Color Corrector effect used in conjunction with the Track Matte effect.

Finishing with custom PiPs. you learned that with a few simple steps you can use the Titler to create an adjustable border that adds a great look to your PiP effects. To change the emphasis of the frame size around your PiP, adjust the size of the inner stroke in your title frame. To change the shape and look of the frame itself, play with the Lit and Tube options to toggle between a flat frame and a rounded one. As for the colors, you can specify them on a project-by-project basis by loading the frame you build from the Templates dialog.

Adding a slight drop shadow helps give the PiP a greater feeling of depth on top of the image that it covers. You can even add a slight edge feather if you want to soften up the edges a bit.

Finally, using the custom PiP presets can save you a lot of time if you apply them properly. If you intend on using two keyframed effect presets, remember to split the clip in half before adding any of the keyframed presets.

Having one custom title frame and all the custom presets should make your life much easier when it comes to creating a good-looking PiP effect.

In the next chapter, you'll complete your look at advanced effects by learning how to properly shoot and key out green screen material.;



Chapter 25. Green/Blue Screen Keying

As you learned in the last chapter, keying involves replacing elements of one image with those of another. Green and blue screen keying keys out the green and blue information from one image, making it transparent so other images can show through. Using green and blue screen keying techniques, you can make a person appear in different locations or environments. In the Lord of the Rings films and the last remake of King Kong , for example, green screen tarps were hung up around actors and blue screen sets were constructed to enable full flexibility for incorporating computer-generated background elements in hundreds of shots.

In this chapter, you will learn how to set up and light a green/blue screen shoot, as well as how to key out the recorded green/blue elements in Premiere Pro. The first lesson provides an overview of setting up your shoot and of the tools you can use to make green/blue screen keying much easier and more accurate. The second lesson takes some imperfect green screen elements from Chapter 27's live multi-cam shoot and shows you how to key out the green screen to introduce different backgrounds for the material. You also will use Garbage Mattes to clip sections of your image, removing excess material in a single action. Finally, you'll investigate using the new Secondary Color Correction effect in the Three-Way Color Corrector to clean up and strengthen your green screen for better keying results.

To get things started, let me first give you some tips about the fundamentals for setting up a good-looking green screen shoot.