I have 3 DS-2DF8236 series cameras. These are the huge $3500 ones that have or at least had excellent tracking.
Two of my cameras have v5.4.9 and track perfectly.
The third has v5.6.0 and can't track hardly at all. It seems obvious that the algorithm was updated either intentionally or a bug that results in the camera zooming in first and then panning rather than panning and then zooming in. You can see the results in the two video. I've tried everything from using identical settings to many variations on the 5.6.0 firmware. Nothing seems to make much of a difference.
Smart tracking with 5.6.0:
Smart tracking with 5.4.9:
Two of my cameras have v5.4.9 and track perfectly.
The third has v5.6.0 and can't track hardly at all. It seems obvious that the algorithm was updated either intentionally or a bug that results in the camera zooming in first and then panning rather than panning and then zooming in. You can see the results in the two video. I've tried everything from using identical settings to many variations on the 5.6.0 firmware. Nothing seems to make much of a difference.
Smart tracking with 5.6.0:
Smart tracking with 5.4.9: