Problems with tracking free move rotations

Hey everyone,

I’ve been doing a ton of tests every day to improve my ability to track cameras. I can do all the easy stuff like where you keep the same tracking markers in the lens view all the time.

The problem I’m having is just with free move rotations. Let’s say I stand facing down the X axis, take a good 5 steps to my left, and then turn 90 degrees and take another 5 steps so my camera is now facing somewhere around 90 degrees to the right from where it started at the beginning of the shot. This type of camera move makes it so that the things that were in the view at the beginning of the shot are no longer in the shot by the end.. (I will draw a diagram if needed, just let me know how much more info I need to give).

What happens is that I track it, and it comes out good for the most part, but there is some slipping on the test objects. The slipping is strange because the test object slips like it is rotating in the scene, but it is not rotating at all. The test object looks like it’s rotating maybe 15-30 degrees.

I even went as far to put actual tracking markers down on the ground, which one would think that would give me a 100% perfect track because they are at a perfect 90 degree angle and perfect for aligning my scene geometry/grid plane.

My main question is this: Is there some sort of special procedure I need to take on a rotating free move like this? I just can’t seem to get it no matter how many manual markers and how much auto tracking I do. It’s just looks like a perspective issue on the camera, but that shouldn’t be happening because the lens never zoomed.

I also just did a 360 degree turn while stepping forwards and backwards and a little bit side to side, and that turned up bad as well. I need to be able to add rotations to my capabilities.. It can’t be that professional camera tracking people working on the Harry Potter films and such have to tell the technical director and director that the camera movement cannot be a rotation, that would just be silly. There’s gotta be a way to do this!

Thanks for any help!

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