I took a quick video on my iPhone 4, and tracked it in Blender. It appears to have tracked quite well. Note that I have some tracks in the foreground and some in the background:
However, after solving, Blender seems to think that all the tracks are basically planar, at a roughly fixed distance from the camera:
I used the tripod solve mode, because the camera isn't moving (just panning/rolling) in the shot, as suggested here. Is this correct?
I did select the "iPhone 4" preset, but I didn't change any of the other settings.
What can I do to get the scene to be tracked correctly?