Use the Average curve options to smooth out uneven camera motion. For example, if the camera moves at a certain rate and suddenly drops or increases in speed, the Average option can stabilize the camera motion.
The Average curve smooths out camera motion over a group of keyframes, by affecting the Stabilizer's Shift values. The Shift values represent the amount of movement in a clip. Use the Curve Value field to determine how much stabilizing is applied to the clip. A larger value averages camera motion over more keyframes and increases camera smoothness. This is largely a process of trial and error.
Analyze your clip to generate the initial channel data, then select the channel to apply the average to.
To smooth out camera motion:
(a) Keyframe tab(b) Curve option box (c) Curve Value field
The transformation is applied to the curves. The Curve Value field defaults back to 0, where 0 always represents the average of the current curve.