I can only guess as to how you describe it that either the hard drive or the cam are not running at the same speed and the difference is the jerky results,or you have other programs like a virus scanner ckecking the file as it saves.
This thread is now locked and can not be replied to.
How to get Windows 10 for free | How to install Windows 10: There is still a way to avoid paying…
1995-2015: How technology has changed the world in 20 years
Alex Chinneck’s giant ice cube Christmas tree at Kings Cross