Solving Camera Motion
In the Tools Region, jump to the Solve tab where you’ll find options to solve the camera motion that will ultimately be in your 3D scene. For example, you’ll see the Tripod option; if you filmed from a tripod, your footage won’t have much perspective information, so Blender will only calculate the camera rotation if you enable this option.
The keyframes selection is also important. Blender needs to select two frames of the footage that will serve as a base for calculating the perspective in the rest of the frames. Those two frames should be frames that include fairly different perspectives but have a significant number of markers in common between them. This way, Blender will compare the perspective shift of those markers ...
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