How to Replace the Background in After Effects

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Replacing the background in After Effects is something that you can do to make it appear like footage was shot someplace else. Replace the background in After Effects with help from a certified Adobe instructor in this free video clip.

Part of the Video Series: After Effects Made Easy
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Video Transcript

Hi, I'm Matt Pizzi. We're gonna talk about how you can replace the background in a video. If you're shooting video with a green screen or a blue screen, you may want to replace that with video footage or a picture, and After Effects make this very easy. The first thing that we need to do is create a new composition. We can do this by clicking the new composition button here in the welcome screen, or we can go up to the composition menu and choose new composition. In the new composition dialogue box, you want to make sure that you give it a name of background example. The dimensions of the composition in this case are for standard definition video. Once you're happy with the composition settings, click okay. The next thing that we need to do is import some media. And we can do that by going to the file menu, and from the file menu you can choose import. In my case I have a folder called examples. And I'm gonna select these two video clips. To select both video clips, click one, hold down the shift key, and select the other. Then go ahead and click open. You'll see the two video clips in the project folder. If you click on a video clip, you'll see a preview up here in the project folder, and if you double-click it, you'll get a larger preview. We need to drag both of these video clips into the timeline. So I'm gonna select the first video clip and drag it down into the timeline, which is the bird flying around in the green screen. Then I'm gonna drag the background video clip, which is the clouds, and place it underneath the bird. Now we want to get rid of the green in the green screen. We can do that by selecting the dove layer. With the dove layer selected, go up to effect menu. From there you can choose keying, and then you can choose Keylight 1.2. Inside the panel, you can come over and select the eye dropper tool. With the eye dropper tool, click on the green portion of the green screen to remove it from the video. Once you remove the green, you can move the time indicator to see the dove video play in front of the clouds. If you need to make adjustments, you can adjust the values to the screen gain here inside this panel.


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