I am using Pinnacle Studio Ultimate version 12 to edit my HD footage. After several time consuming attempts every completed version has jerky footage especially when the camera is panning. I used a Panasonic HS300 camera and copied the raw footage onto DVD with Panasonic DVD Burner VW-BN1 and this footage is perfect. The problem seems to be when I start editing and using the above software. I have used this software for six months now and just noticed the problem. Does anyone have any suggestions or similar experience?