Checking the Tracker Trails

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‌Checking the Tracker Trails

The following procedure has proven to be a good way to quickly identify problematic trackers and situations, such as frames with too few useful trackers.

1. Go to the camera view

2. Turn off View/Show Image on the main or right-click menu.

3. Scrub through the shot using the time bar. Look for

1. regions of the image without many trackers,

2. sections of the shot where the entire image does not have many trackers,

3. trackers moving the wrong way from the others.

4. Turn on View/Show tracker trails on the main or right-click menu.

5. Scrub through the shot using the time bar. Look for

 funny hooks at the beginning or end of a track, especially at the edges of the image,

 zig-zag discontinuities in the trails.

Your mind is good at analyzing motion paths without the images — perhaps even better because it is not distracted by the images themselves. This process is helpful in determining the nature of problematic shots, such as shots with low perspective, shots that unexpectedly have been shot on a tripod, tripod shots with some dolly or sway, and shots that have a little zoom somewhere in the middle. Despite the best efforts and record-keeping of on-set supervisors, such surprises are commonplace.

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