Originally Posted By: Kuato
Originally Posted By: Quattro Pete
Originally Posted By: Kuato
Our eyes "see" at 60fps. So with any slower speed, the frame change will be noticeable.
The thing is, if I shoot the video natively at 30 fps, it is smooth and not jerky. So it's something in my 60>30 frame reduction process that causes this.
Hmmm sounds like your software in the camera automatically adjusts for it?
Frame rate and shutter speed are important and can have unintended consequences if chosen on merely a whim without understanding what is involved. With an increasing frame rate the shutter speed should be ever shorter. General rule: set shutter speed to inverse twice the frame rate. For example, at 30 fps, you should have 1/60 sec shutter speed and at 60 fps you should have a 1/120 sec shutter speed. And here lies the problem: if you convert to a lower frame rate, the shutter speed at which you recorded is way too fast for the new lower frame rate. That, potentially combined by simply dropping frames instead of morphing/blending, causes the jerkiness.