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Zero-Weighted Frames
If you have a few frames where you have eyeballed tracker positions, perhaps due to extreme motion blur or defocusing, you have the option to tell SynthEyes to solve
for the camera/object position on those frames, but not affect the 3D tracker positions.
To do that, open the Solver Locking panel (title line is Hard and Solf Lock Controls), and animate the Zero-weighted frame checkbox at its top to indicate those particular frames.
Don't use the zero-weighted frame channel so much that all of a tracker's frames are zero-weighted. If that happens, the tracker will be insoluble and the solve will fail.
Trackers need to have a sufficient amount of perspective shift over their lifespan. If a tracker is valid on twenty frames, which would be fine by itself, l but all except the first two are zero-weighted, that tracker cannot be solved accurately because there is too little shift between the two usable frames.
Once you have created some animation on this channel, it will be visible in the Graph Editor, up at the top for each affected camera and object.
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