Adjusting tracking paths
You can fine-tune or modify the behavior of a tracking path by manually resetting track points. For more information on creating tracking paths, see
Tracking motion of video objects.
To adjust tracking paths
1 Select a video file on the Video Track and click the
Track Motion button
on the
Toolbar.
2 From the list of trackers, select the tracker that you want to adjust.
3 Drag the Scrubber to locate the point where you want to adjust the path.
4 Drag the tracker to the new key frame position.
5 Click the
Track Motion button
to retrack the path. The tracker continues tracking using the new key frame position.
Adjusting the track points allows you to fine-tune or smoothen the movement of matched objects.
To define the tracking path duration
1 Drag the
Scrubber to the point where you want to start motion tracking. Click the
Track in button
.
2 Drag the
Scrubber to the point where you want to end motion tracking. Click the
Track out button
.
The tracking path duration is defined.
To extend tracking path duration
1 Drag the Scrubber to the untracked area where you want to end motion tracking.
2 Click the
Track Motion button
.
The motion of the tracked object and the extended path are generated.
Dragging the
Scrubber and clicking the
Track in 
button removes the current path and marks a new starting point.
To reset tracking paths
You can reset the current tracking path and select a new area to track by doing any of the following:
• Drag the tracker point to another location.
• Drag the
Scrubber to another location and click the
Track in button
.
• Click the
Reset button
.
To show or hide trackers
• Click
or
to show or hide trackers.
To add trackers
1 Click the
Add a new tracker button
to add the second tracker. A new tracker appears on the screen and a new tracker is added to the list.
2 Drag the tracker to the part of the video that you want to track.
In our example, the second tracker is dragged to a stationary fishing ladder on the lake.
3 Click the
Track Motion button
.
If Show tracking path is selected, the paths of both trackers are displayed and the selected tracker is highlighted.
In the example, Tracker 1 tracks the boy while Tracker 2 tracks the stationary fishing ladder on the lake. Since the camera is panning to the right, the result shows the path of Tracker 1 moving to the right and the path of Tracker 2 moving to the left.
4 Click OK.
To remove a tracker, select a tracker and click the
Remove tracker button
.
To rename trackers
1 Select a tracker and click the
Rename tracker button
.
2 Enter the new tracker name in the Rename Tracker dialog box.
3 Click OK.
