Auto detect and auto pan to ball in video I'd like to set up a 4K video camera in the corner of a soccer field and just let it record. Afterwards I'd like to use a video editor to zoom into a smaller (1080) area where the ball is and auto pan to follow. 

This takes too long to do manually. Do you know any software that will track the ball (or movement of people) and zoom into that area generating a 1080 or 720 output of the action around the ball? If not automatically, any suggestions on the fastest/easiest way to do this?
You could do it in real life by attaching a transmitter to the ball and having a robotic pan/tilt tripod head track the movement.  If you're shooting 4K, your budget's probably in line with something like soloshot. Or, of course, you could pay a cam-op.  Taking the time (or paying someone) to track it in Mocha or AE will end up being more expensive than capturing the moment as it happens.