Certain types of shots are difficult to
solve. In these situations, review this table to see how to obtain
a good solution. Many of the tips involve constraints; for complete
information see
Solving in Maya Live
Shot Type
Difficulty
Tip
Camera rotation only (panning
on a tripod)
Using track points alone does not provide enough information.
The camera translation constraint may be useful. (Live also
has camera rotation constraints, but you can only constrain all
three axis at once.)
Change the Rotate Order to
ZXY in the Attribute Editor, under the shotCamera
node, Transform attributes.
Also try adding survey constraints, especially Depth.
Truck or dolly with
no camera rotation (moving down a hallway)
Features do not stay in frame long enough to provide
useful tracking data
Choose features in the center that overlap the
start and end of the shot. Also use ample survey constraints. In
the hallway example, use plane constraints for the floor and walls.
Whip pan (quick movement)
Tracking information is not accurate enough.
If the whip pan affects minimal frames, you
can fine-tune the camera manually.
Increase root frames around areas of exaggerated movement.
Minimal camera movement
There’s not enough information for a camera solution.
If Live cannot
solve for a camera, it may solve for object movement.
Few track points (desert, snow, or water scenes)
There are not enough track points to produce a solution.
Add survey and camera constraints to compensate for the
lack of data.
Camera zoom
It is difficult to discern between zoom and camera movement.
Turn off the Static parameter
on the Solve Camera control panel.Make two
or more 3D points Infinite, using the Locator Summary panel,
provided those points are visible long enough.
Very long shot (1000 frames or more)
Too many variables for the solver.
Track and solve for
a segment of the shot, such frames 1-300. Once you have an initial
success, you can then complete the rest of the scene.
