The camera was handheld and passed from one operator to another or connected to cablecam trollies ascending from street level, through the building and at the other side again on a cablecam and above the street.Together there were two flights with cablecam systems and the rig was connected with a magnet to the trollies for fast coupling. this is how a shot is made using Movi. http://www.gemsys.ca/products/uavs-pathway-to-the-future/
It worked for me by using accelerometer and filtered magnetometer. From these two sample vectors, an orthogonal basis is formed whereby a rotation matrix is developed. and posibly made the camera movement, Thanks for the stuffs.