Voodoo, the well known free camera tracking software, has recently been updated with some nice fixes.
From the Voodoo site:
The Voodoo camera tracker estimates camera parameters and reconstructs a 3D scene from image sequences. The estimation algorithm offers a full automatic and robust solution to estimate camera parameters for long video sequences. The results are useful for many applications like film production, 3D reconstruction or video coding... Export the estimated camera parameters to the 3D animation package 3D Studio Max, Softimage, Maya or Blender.
Voodoo, for Linux and Windows, has the following fixes listed with this new version:
- fixed bug that causes regular crashes in free-move tracking in version 0.8 and version 0.8.1
- allow later refinement (bundle adjustment) of results in memory
- added new Modelling Tools