smooth follow camera jerking

Hi friends.
i am working on a running game like temple run, i have used the smooth follow camera script , now the problem is that
the camera is jerking, please guide me.

thanks

This could be any number of things. A few common gotchas:
Any camera manipulation should be done in LateUpdate() if at all possible.
Even if camera motion is smoothed, it may still be moving too much in one frame.
Still jerky? Try manually changing the execute order of your scripts to affect when the smoothing occurs.
A stylish way to combat jerky cameras (when it’s possible) is to also track and smooth rotations.
For added smoothing over precision, the object the camera is tracking can be smoothed too.
You can code your own custom interpolator for smoothing.

Good luck!