Hi.
I have this shot to track. It starts looking at the green screen wall, some camera movement and plenty of markers to get a 3D solution and camera parameters.
Then the camera, as it moves back a little, refocuses on a character on the foreground.
Finally the camera drops and the shot ends by looking a the ground.
There are enough markers on the ground to apparently get a good 3D solution but the previous marker of the green screen wall are not visivle anymore.
Question 1: how do i tell mmp that the first few hundred frames are of constant focal length (constant initialized), the last frames have a constant FL but different from the one before, and in between the FL is variable?
in mmp you can specify whether the FL is constant or variable but there doesnt' seem to be a way to keyframe those properties.
You guys do have the camera constraints that can be set on specific frames but constraints on FL can only be set to 'constant initialized' 'unknown' or 'fixed'. You cannot specify the FL to be variable.
There seems to be a need for such a feature in mmp because as it is right now it looks like mmp can solve shots of constant or variable FL but not combinations of them. Forgetting about the variable FL, It also Cannot solve shots that have a constant FL on one part and a different constant FL on the second part.
Question 2: how to proceed to solve such a shot? solve both start and end parts independently in different projects and then animate the camera in between in a 3D package?
I tried to solve in sections but if i select the first few hundred frames and set the other frames to do not solve, solve, and then select the last few hundred frames and set the first few hundreds to do not solve, solve, when trying to solve this last section, it will not work because the coordinate system was defined with the points of the first section which are not visible anymore.
