After Effects Apprentice 12: Tracking and Keying
Explore how to use the motion tracker and stabilizer built into After Effects and shows how to handle a variety of shots. Author Chris Meyer leads a quick tour of the third-party software mocha and demonstrates the workflow for The Foundry's KEYLIGHT, both bundled with After Effects. The course also covers tracking a greenscreen shot with a handheld camera and replacing its background.
The After Effects Apprentice videos on lynda.com were created by Trish and Chris Meyer and are designed to be used on their own and as a companion to their book After Effects Apprentice. We are honored to host these tutorials in the lynda.com Online Training Library®.
- Understanding motion stabilization and keying
- Performing a track
- Applying tracking to effects
- Keying with KEYLIGHT
- Replacing images
- Improving the composite
- Garbage masking
- Dealing with interlaced footage
Hi! I'm Chris Meyer of Crish Design and welcome to the After Effects Apprentice Lesson on Tracking and Keying. Tracking and Keying are two essential cornerstone skills for creating visual effects. Tracking is the ability to follow objects in already shot footage so that you can add new objects into that scene and the final composite looks realistic. Keying is the ability to take footage shot against a colored background, typically green or blue, remove that color background and now take your remaining foreground object and put it in front of a brand-new scene.
First we'll cover the Warp Stabilizer, which was introduced in After Effects at CS5.5. This is a highly automated way of smoothing out what might otherwise be a rough camera move. We'll then cover the so-called Classic or Legacy point-based tracker and stabilizer that has been in After Effects for ages and it's an essential tool to track and stabilize existing footage. We'll show you how to use Mocha AE, an advanced planar tracker that makes it easier to do screen replacement, change out billboards and already shot footage, etcetera. And then we'll play around with the brand-new 3D Camera Tracker added in After Effects CS6.
Instead of tracking objects in a scene, this recreates the camera's original position on a shot so that you have a new 3D world that matches the original world. Once you have mastered these tools and skills, you can stabilize movement in a shot; attach another layered tool feature in a shot; have an effect point to follow that feature, so for example radio waves emanate from it; replace an object with a brand-new layer, we'll be doing some screen replacement later in this lesson; and create fantastical new worlds where objects hang in 3D space. For Keying, we'll be taking action shot with a handheld camera against a green or blue screen; make that background transparent; make sure that you actually want to keep is nice and opaque with some nice smooth edges; and then place result over new background.
We'll combine that with stabilization to either remove the camera or add the camera's original movement to a new background. This lesson also includes Sidebars with advice on Tracking and Keying, plus how to use a brand-new Rolling Shutter Repair effect to remove artifacts introduced by many current generation cameras. Now, Tracking and Keying are very deep subjects that require a lot of practice to master. Our goal here is to get you introduced to them, get you familiar with them, feeling more comfortable with them, so as you can go ahead and tackle jobs, practice, and get really good at these, so you too, can create Visual Effects in After Effects.
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- Q: This course was updated on 12/12/2012. What changed?
- A: We added new chapters on the Warp Stabilizer and the exciting new 3D Camera Tracker, and new movies on the Tracker panel, converting to ray-traced 3D, and rolling shutter repair, all new features introduced in After Effects CS6. In addition, there are new sets of exercise files designed for After Effects CS5.5 and After Effects CS6 and a companion movie that shows our premium subscribers how to use the exercise files.
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