User Manual

316 | CHAPTER 17
7. The 3D track motion occurs instantly, and the results are updated in the Video Preview window.
8. Use the keyframe controller at the bottom of the Track Motion window to establish distinct track motion settings throughout
the duration of the track.
During playback, immediate frames are interpolated to create smooth motion. Expand the Keyframe interpolation heading
on the left side of the window and drag the Smoothness slider to adjust the interpolation.
For more information, see Using
keyframe animation on page 332.
Applying a stereoscopic 3D camera
The Stereoscopic 3D Camera controls allow you to add stereoscopic depth to 3D track compositing elements.
1. Set up your project as a stereoscopic 3D project. For more information, see Setting up your stereoscopic 3D project on page 125.
2. Add 2D media to the timeline.
3. Click the Track Motion button ( ). The Track Motion window is displayed.
4. From Compositing Mode drop-down list, choose 3D Source Alpha.
5. Click the Expand button ( ) next to the Stereoscopic 3D Camera heading on the left side of the Track Motion window. The
Lens Separation and Depth Adjust controls are displayed.
6. Use the Lens Separation and Depth Adjust controls to set the depth of your media:
Changing editing options
Use the toolbar at the top of the Track Motion window to change your editing options.
Item Description
Lens Separation
Type a value in the box (or click the down arrow button ( ) to display a slider you can
drag) to set the distance between the lenses in your virtual stereoscopic 3D camera.
The setting represents a percentage of the frame width. For presentation on a 40-inch
HDTV, the value typically would not exceed 7 percent. For theatrical projection, the
value typically would not exceed 0.5 percent.
Depth Adjust
Type a value in the box (or click the down arrow button ( ) to display a slider you can
drag) to displace the left-and right-eye images to set the depth of your 3D image. You
usually want all of the action behind the screen plane, only crossing the screen plane
for dramatic or special effect. However, make sure never to create divergence, where
the left-eye picture would appear more than 2.5 inches to the left of the right-eye
picture on the largest screen where your movie will be shown.
A value of 0 represents screen depth; positive values push action behind screen
depth, and negative values push action in front of screen depth.
Icon Command Description
Enable Rotation Select this button if you want to be able to rotate, or spin, the video.
When the button is not selected, video is locked so you can move it along the X, Y, or Z axis,
but the event will not rotate.
Enable Snapping to Grid Select this button if you want your editing to snap to the grid.
Edit in Object Space Select this button if you want to edit in the object’s space rather than the camera’s space.
For example, if a video object is rotated, its X axis may not correspond to the X axis of the of
the Video Preview window. Selecting the Edit in Object Space button in conjunction with
the Prevent Movement buttons allows you to move the object along its own X, Y, and Z
axes.
Prevent Movement (X) Select this button if you want to prevent horizontal movement of the track.
Prevent Movement (Y) Select this button if you want to prevent vertical movement of the track.
Prevent Movement (Z) Select this button if you want to prevent movement of the track along the Z axis (closer to
or farther from the viewer).
Lock Aspect Ratio Select this button if you want the selection box to retain its aspect ratio during resizing.
When the button is not selected, the height and width can be resized independently.