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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®.
At this point, I've analyzed my clip, and After Effects was saved underneath my named tracker where it found the Feature Center on each frame of my shot, this Confidence that it indeed found at the right point, and I am going to go ahead and drag my time indicator through here and you see I kept a pretty high Confidence throughout the shot, and finally, where the Attach Point is located. Since I left the Attach Point at its default position, the very center, my feature region, it has the same coordinates as my Feature Center. Now that the analysis is done, I can actually apply the results of my track.
In this case, I want to use it to stabilize the shot. So I will make sure my Track Type is set to Stabilize. Since I am stabilizing, my Motion Target, by default, is myself. Since, I am trying to stabilize myself, rather than having another layer, follow me. Once I verify these settings, I click Apply. After Effects will open a dialog with Apply Options so you can decide whether or not to stabilize in both dimensions or only one of the dimensions. The vast majority of the time you are probably going to be stabilizing both dimensions.
However, there will be occasions, when for example, you may want to keep a camera's pan in the X dimension, you only want to stabilize, where you move, it bouncing up and down in the Y dimension. That's why this dialog appears. But most of the time, just go ahead and click OK, press Enter on your keyboard, and now the shot has been stabilized. Notice that when I did so, After Effects brought the Composition panel back forward again so I can see this shot in the context of the composition rather than just in isolation.
And I press U once to twirl the keyframes, press U a second time and now I'll see, not only do I have my Motion Tracker information, I have an animated Anchor Point. That is what After Effects is using to stabilize a shot. It's offsetting where the center of the shot is. I will press 0 on the numeric keypad to RAM preview, hold my cursor over a point that was previously moving, such as this little speck in the clouds and you will see that that shot is now stable. Don't be distracted right now by what's happening with the very edges of the shots and don't be distracted with this little burn that I had to put in this footage.
Our goal of stabilizing the clouds and the horizon has actually been achieved. But we do have some issues with parts of the background being exposed. We will clean those up in the next movie.
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