Logger pro

I've been trying to use Logger Pro to model the flight path of a tennis ball. For some reason when I import the video into logger pro, the quality becomes lower and the frames per second is lower than when I play the video normally in quick time movie. The ball looks incredibly blurry as well in quick time player, does anyone know how to solve this issue? Or is there another resource/ app that is better at analyzing trajectories of projectiles, plotting the path on a graph and also finding the velocity at each point?