Motion 5 - Manually Coaxing Your Track with Keyframes

Manually Coaxing Your Track with Keyframes

When dealing with more challenging tracks, you can manually insert track position
keyframes to help guide the tracker towards a reference pattern. For example, if you have
a footage with significant motion blur or objects that partially obscure the tracking pattern,
you can manually create tracker position keyframes to help guide the tracker.

To manually coax a track using the Record button

1

Apply a Motion Tracking behavior to the clip, then enable Record (press A).

2

In the Canvas, position the tracker at the reference point you want to track.

A track position keyframe is created in the behavior (visible in the Keyframe Editor).

3

Navigate to the next frame where you want to create a keyframe.

Note: You can press Shift-Right Arrow key to jump forward ten frames, or press Shift-Left
Arrow key to jump backward ten frames.

4

In the Canvas, position the tracker at the reference point you want to track.

5

Repeat steps 3 and 4 until you’ve completed the track.

6

In the Behaviors Inspector, click the disclosure triangle for the track you have manually
adjusted, then choose Use Existing Keyframes from the Fail Behavior pop-up menu.

7

Turn off the Record button (press A).

8

Go to the first frame of the clip, then click the Analyze button in the behavior HUD or
Inspector.

Important:

Even though keyframes are created, you must analyze the footage to obtain

the tracking data.

To manually coax a track without enabling Record

1

Apply a Motion Tracking behavior to the clip.

2

In the Canvas, position the tracker at the reference point you want to track.

3

Choose Object > Add Position Keyframe.

This command is available for the Analyze Motion, Match Move, Stabilize (with manual
trackers), Track Points (in the Shape behaviors category), and Track (in the Parameter
behaviors category) behaviors.

Note: Keyframes cannot be created for automatically stabilized footage. Use the Track
Region option for adjusting automatic stabilization, or convert the stabilized footage to
keyframes. For more information on the Track Region parameter, see

Adjusting the

Stabilize Behavior’s Track Region

. For more information on converting tracking data to

keyframes, see

Converting Tracks to Keyframes

.

4

Navigate to the next frame where you want to create a keyframe.

Repeat steps 2–4 until you’ve completed the track.

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Chapter 22

Motion Tracking