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Using the Roto Brush tool in Adobe After Effects CS5

Article Description

This excerpt from Adobe After Effects CS5 Classroom in a Book shows you how to use the new Roto Brush tool in After Effects CS5, which is much faster than conventional rotoscoping, and for movies with complex backgrounds, much easier than keying.

Adding a background image

You could dissolve to a transparent background, but for this project, you’ll add a peacock image as the final visual component.

  1. Drag the Peacock.jpeg element from the Project panel into the Timeline panel, placing it at the bottom of the layer stack.
  2. Press the P key to reveal the Position property for the layer, and change the Position value to 405, 399.
  3. Press the Shift key and the S key to reveal the Scale property as well. Change the Scale amount to 83%.
  4. Go to 3:05. Create initial keyframes for both the Scale and Position properties.
  5. Move to 4:00. Change the Scale amount to 45% and the Position value to 153, 240.
  6. Select the Position property to select both keyframes. Right-click (Windows) or Control-click (Mac OS) one of the keyframes, and choose Keyframe Assistant > Easy Ease.
  7. Select the Scale property to select both keyframes. Right-click (Windows) or Control-click (Mac OS) one of the keyframes, and choose Keyframe Assistant > Easy Ease.

    Easy Ease makes movement more natural-looking. So does motion blur, so you’ll add that now.

  8. Click the Toggle Switches/Modes button at the bottom of the Timeline panel. Then select the Motion Blur switch (motion_blur.jpg) for every layer except the Flamingo Video layer.

    The Flamingo Video layer doesn’t need motion blur because it doesn’t move.

  9. Select the Motion Blur For All Layers button to enable motion blur.
  10. Hide any properties that are open for any layer.
9. Adding audio | Next Section Previous Section