After you have keyed your green-screen footage in Adobe After Effects, you will want to send the keyed clip to another application. You have a few choices to pick from for sending the clip. In this video, Richard Harrington demonstrates how to render a clip with a straight alpha channel out of After Effects.
- Sometimes as you work, you might decide that you want…to preserve flexibility for later.…If you've already keyed footage,…you can actually render that transparency data in…and store it inside the movie.…This'll make it that much easier…when you need to go ahead back to an editorial program…or reuse a shot in the future…that the transparency is actually baked in.…Let me show you.…Now we've opened up a project in After Effects,…and previously I had keyed my subject over a backdrop.…
But perhaps I want to save this…as a video file with embedded transparency.…Well, this is pretty easy to do in After Effects.…If you want to see the traditional transparency grid,…just click the checkered box here,…and you'll see the grid inserted.…That makes it easier to judge.…You might want to punch in to 100%…and just check your edges.…You can hold down the spacebar…to get the Hand tool and navigate through.…But look at your document, and make sure you're satisfied…with the overall transparency.…
If you are, this is pretty easy now.…
- Keying in Premiere Pro vs. After Effects
- Importing footage to key
- Stacking layers in Premiere Pro
- Using the Ultra Keyer
- Using KEYLIGHT
- Enhancing a key with 3D lights
- Deciding when to use a third-party tool
- Processing backdrops in Photoshop
- Exchanging transparency data
Skill Level Intermediate
After Effects Apprentice: 12 Tracking and Keyingwith Chris Meyer3h 54m Intermediate
VFX Techniques: Crowd Replication with After Effectswith Lee Lanier2h 54m Intermediate
After Effects Compositing: 4 Color Keyingwith Mark Christiansen2h 7m Intermediate
1. Deciding Where to Key Your Footage
2. Importing Footage to Key
3. Keying in Adobe Premiere Pro
4. Keying in Adobe After Effects
5. Selected Third-Party Keyers
6. Processing Backdrops in Photoshop
7. Backdrop Techniques
8. Exchanging Transparency Data
Next steps1m 9s
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