From the course: Premiere Pro Guru: Compositing and Masks

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Creating and modifying alpha channels

Creating and modifying alpha channels - Premiere Pro Tutorial

From the course: Premiere Pro Guru: Compositing and Masks

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Creating and modifying alpha channels

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- Before you work with all alpha channels, the first thing you need to do is assess your project's requirements. Are there elements that need specific transparency levels? Do you need a key? Do you need a matte or a mask? Let's go ahead and open the sequence named 1.4 Creating and Modifying Alpha Channels. The first clip that we see in here is of Jökulsárlón, which is the glacier lagoon in Iceland. If we want to blur everything but the kayaks, we know that we are looking at some kind of keying. We can do that by using the chroma key. Let's try it. Let's duplicate the clip. Alt or Option while dragging will do just that. Now, let's apply the color key effect to the top clip. Go to the Effects panel, type "color key," and then just drag the effect to the clip. And color key red out. You do that by using this eyedropper and then clicking on the red. You can now start changing the Color Tolerance value a little bit.…

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