Tracking Assists
                                                    Auto-tracking data can be improved by seeding User Tracks in a sequence, as CameraTracker assumes manually placed tracks are superior to auto-tracking. Re-tracking after adding User Tracks forces CameraTracker to recalculate auto-tracks using more accurate data.
                                                    
                                                    
                                                    Tip:  Adding tracks is time consuming, but the more User Tracks you add, the better the result is likely to be.
                                                    
                                                        
                                                        
                                                        
                                                        
                                                             | 
                                                            3.  
                                                             | 
                                                            Either re-track the entire sequence by clicking Track, | 
                                                        
                                                    
                                                    OR
                                                    If you only added a few keyframes to a particularly troublesome area of the sequence, click Update Track to re-track just that range of frames.