Stabilize an object (the head) in one position


Hello!
We have this video (see the screenshots).
The problem with the video is that the speaker was constantly changing his position. As a consequence, the head sometimes moves to the right, sometimes to the left, sometimes a little bit up or down.
We need to find a way to automatically process the videos and keep the head always in the same place.
That would create black floating areas on the borders, but it's ok.
Since the movements of the head are very smooth, the general video stabilization algorithm (Warp Stabilizer) doesn't really help.
Any suggestion would be really appreciated!
