If video i/o error is received, do:
- in shell: ps aux www
- find possible processes that use the camera (such as previous HeadTracker-d)
- kill them.

If non-root user cannot access video:
- sudo chmod 777 /dev/raw1394
or
- sudo chmod 777 /dev/video1394/*

If ISO/Bandwidth errors exist:
- Run ../CameraCleanup
