View Single Post
Old 03-20-2012, 05:06 PM   #32
5263
Legend
 
5263's Avatar
 
Join Date: Mar 2008
Posts: 9,033
Default

Quote:
Originally Posted by Chas Tennis View Post
200 fps or more is a good rate for stroke analysis. The shutter speed should be fast to minimize motion blur so that the racket and ball can be located better.

60 fps with fast shutter speed can be a very useful compromise to video both the whole match and some stroke mechanics. (60p progressive and not 60i interlaced.)

At 240 fps, internal shoulder rotation - a very fast motion of the serve that occurs over about 0.03 seconds - takes just 7 frames. With 60fps you do not get enough frames to understand this motion.

(If you want to calculate the motion between frames and motion blur -
http://www.kinovea.org/en/forum/viewtopic.php?id=435 Reply #1)
very helpful, thanks
__________________
MTM Instructor
Pro Supex Big Ace
5263 is offline   Reply With Quote