In my first experiences with wobbling of footage after stabilization process,I thought it was caused by cheap lenses distorting the images, but the main factor is the CMOS sensor inside many photo cameras, video cámeras and most of 'one-piece helmetcams' that you can buy.
It is the result of operation by 'rolling shutter', opposite to 'global shutter' usual in CCD sensors.
It is the result of operation by 'rolling shutter', opposite to 'global shutter' usual in CCD sensors.