Andy, an even easier way is just to film a video at say 25 fps, then in DaVinci simply speed the frame rate up to 75+ fps. Saves having to select every n/th frame in another program 
Andy, an even easier way is just to film a video at say 25 fps, then in DaVinci simply speed the frame rate up to 75+ fps. Saves having to select every n/th frame in another program