After Effects Apprentice 12: Tracking and Keying
Illustration by John Hersey

Quizzler #2 solution: Stabilization plus tracking


From:

After Effects Apprentice 12: Tracking and Keying

with Chris Meyer and Trish Meyer

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Video: Quizzler #2 solution: Stabilization plus tracking

Your second Quizzler challenge was how do you both stabilize and track the same shot? We want to stabilize the bouncy tripod motion in this shot but also attach our text bubble to the second wildebeest moving across the scene. Well, our solution is down in the Quizzler 2_solution folder. I will twirl that open and again you will see that we use a divide and conquer approach. In one composition, we stabilized the wildebeest shot, here's a motion tracking information and here's the anchor point animation.
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  1. 9m 2s
    1. Welcome
      2m 38s
    2. The Tracker panel
      4m 24s
    3. Using the exercise files
      2m 0s
  2. 13m 25s
    1. Warp Stabilizer basics
      5m 59s
    2. Warp Stabilizer advanced parameters
      7m 26s
  3. 30m 6s
    1. Setting up a stabilization
      2m 57s
    2. Track points explained
      5m 48s
    3. Performing a track
      5m 11s
    4. Applying a stabilization
      2m 42s
    5. Cleaning up the results of a stabilization
      3m 0s
    6. Performing a motion track
      5m 57s
    7. Applying the results
      4m 31s
  4. 13m 48s
    1. The Radio Waves effect
      4m 16s
    2. Tracking the mountain
      5m 31s
    3. Compositing the effect
      4m 1s
  5. 24m 28s
    1. Perspective tracking overview
      2m 40s
    2. Tracking to a corner pin
      7m 1s
    3. Improving the composite
      5m 39s
    4. Tracking with mocha-AE
      9m 8s
  6. 31m 49s
    1. Tracking in 3D (new in CS6)
      4m 31s
    2. Creating 3D objects (new in CS6)
      5m 12s
    3. Hanging a poster (new in CS6)
      8m 8s
    4. Adding text (new in CS6)
      5m 33s
    5. Using shadow catchers (new in CS6)
      8m 25s
  7. 16m 46s
    1. Tracking dots
      5m 43s
    2. Dealing with obscuration
      5m 12s
    3. Cleaning up the stabilization
      5m 51s
  8. 12m 40s
    1. Basic keying
      7m 20s
    2. Refining the key
      5m 20s
  9. 13m 32s
    1. Quizzler challenges
      3m 35s
    2. Quizzler #1 solution: Stabilization plus masking
      2m 58s
    3. Quizzler #2 solution: Stabilization plus tracking
      2m 50s
    4. Quizzler #3 solution: Copying a camera's motion
      4m 9s
  10. 12m 28s
    1. Tracking for multiple effect points
      4m 44s
    2. Converting to ray-traced 3D (new in CS6)
      7m 44s
  11. 23m 59s
    1. Legacy tracker advice
      8m 14s
    2. Tracking interlaced sources
      5m 59s
    3. Using garbage masks for keying
      4m 51s
    4. Using the Rolling Shutter Repair feature (new in CS6)
      4m 55s

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Watch the Online Video Course After Effects Apprentice 12: Tracking and Keying
3h 22m Intermediate Nov 23, 2011 Updated Dec 12, 2012

Viewers: in countries Watching now:

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®.

Topics include:
  • 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
Subject:
Video
Software:
After Effects
Authors:
Chris Meyer Trish Meyer

Quizzler #2 solution: Stabilization plus tracking

Your second Quizzler challenge was how do you both stabilize and track the same shot? We want to stabilize the bouncy tripod motion in this shot but also attach our text bubble to the second wildebeest moving across the scene. Well, our solution is down in the Quizzler 2_solution folder. I will twirl that open and again you will see that we use a divide and conquer approach. In one composition, we stabilized the wildebeest shot, here's a motion tracking information and here's the anchor point animation.

That was result of applying the track to stabilize it. As you may remember from earlier in this lesson, once you do that, you do have problems with your video no longer filling the entire frame, one solution is to scale it up, and re-center it. But another solution many people use is they will just make a copy of the footage, paste it behind and use some trick maybe even like a feathered mask to blend the edge between the stabilized footage and the original full frame footage. This doesn't look too bad actually because we do have fairly constant colors around the edges.

Once I have a stabilized composition, again I will nest it into a second composition where I perform the motion tracking. Since liked that composition but I have tracked the stabilized shot that's used so you can see the tracker keyframes and applied that which is apparent to our pointer and our text just like we showed you earlier in this lesson; and this is the result that text thought bubble being attached to the second wildebeest by using tracking. By the way just another creative I've thrown here, I have key-framed the text animation to change the line right in the middle, and by the way, text was a subject of a completely different After Effects Apprentice lesson, but I might change my key-frames here, so that he seems to look at us just as he is making that comment.

So I am going to grab these key-frames, drag them later in time, preview that animation and see if this plays better for laughs. Yeah, I might tweak the time a little bit more, move it back a little bit earlier so the text stays on screen longer so I can read it better. But, that's something to keep in mind when you're working on shots like this. Don't just do the mechanical work of the stabilization and of the track, also look at the footage, think about your timing and think about how to make the shot play out more effectively.

Let's try that key-frame idea. Yeah, I like that better. Again, it's all about dividing the task into individual modules you can solve, then combining them to create your final result.

Find answers to the most frequently asked questions about After Effects Apprentice 12: Tracking and Keying .


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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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