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Stereo Solving Mode
The stereo mode uses the trackers that are linked between cameras to get things going. It does not rely on any camera motion at all: the camera can be stationary, and even a single still for each camera can be used, as long as there are enough nearby features (compared to the inter-ocular distance).
Important : The Begin and End frames on the Solver panel should be configured directly for Stereo Solving mode—somewhat differently than for a usual automatic solve, so please keep reading. To begin with, the checkboxes should be checked so that the values can be set manually.
The Stereo solve will literally start with the Begin frame from both cameras; it should be chosen at a frame with many trackers in common between the two cameras.
However, this offers a limited pool of data with which to get started. A much larger, and thus more reliable, pool of data is considered when the End frame is set as well. The Stereo solver startup considers all the frames between the Begin and End frames as source data.
The one caveat: none of the camera parameters must change between the begin and end frames, including the distance or vergence, even if they were marked as changing (see the next section).
If any of the camera parameters are constantly changing throughout the shot, or it can not be determined that they do not, then you must set the End frame and Begin frame to the same frame, and forego having any additional data for startup. Such a frame should have as many trackers as possible, and they should be carefully examined to reduce errors.
If you do not select the Begin/End frames manually (leave them in automatic mode), then SynthEyes will select a single starting/ending frame that has as many trackers in common as possible. But as described, supplying a range is a better idea.
Note that you might be able to use the entire shot as a range, though probably this will increase run time and a shorter period may produce equivalent results.
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