[QUOTE=bilgekaan] Hey guys, I need a vIdeo capture software that can record smoothly. I already tried CamStudio, Screenr, NHC or something like it and Camtasia.[/QUOTE]
Well if you have tried those and haven't found them to record "smoothly" have you thought about looking at your computer's specs?
Camtasia Studio in my opinion is probably THE best screen recording software out there, if not, it's most definitely one of the top three. When I use it, it records perfectly fine.
Sometimes depending on your settings when you render out your recording it can look a little choppy but that is due to compressing the file size down and such.
What are you trying to record?