Trajectory Curve Generation from Perspective/Camera Movement

Hello, this would help a lot with camera animation:

I need to generate a curve from the movement of perspective (OR camera, but perspective would be a lot better) view. The movement of the perspective (or camera) view would be made realtime, using the mouse abd keyboard for standard movement of the perspective (camera) view. I would hit for example "record" button, then freely move/rotate/zoom etc. the perspective view (camera view) using the keyboard and mouse buttons for manipulating the view. After that i would click "stop" and the script would generate the curve of the camera movement(and rotation and zoom/dolly).

Or something like that, it doesnt matter then the curve is generated.

This would be GREAT for camera animation...

Is it even possible to do somehow?