I have taken the sampled pixel values in a tracker file and used the raw pixel data in various Python programs.  

Those programs have access to the extensive processing functions available in Python, and for example can  use spline fitting techniques to produce smoothed angle, angular velocity, and angular acceleration graphs.

This approach would also get rid of the large ripple effects that result from the  simple finite difference approaches used to calculate the velocity and acceleration graphs in Tracker for high speed videos.

Is there someway to input that processed data to a input tracker file so that data can be shown in the tracker graphs rather than the default velocity and acceleration graphs?

It would also be useful if processed pixel data for the rotation angle of bat or stick could be input to tracker and have them displayed on athe final output video.

Thank you for making such a useful tool available for digitizing high speed videos.  The ability to "nudge" sampled points with a second pass through the video is especially useful.