I wonder how the computers can generate the in-between frames that actually mimics the movement of the character without other possible flaws.
@Leon-Shao It should be pretty simple for computers to generate in-between frames by simply using some properties of animation like ease-in and ease-out. This should work well in some but not all occasions since not all movements share the same in-between animation.
I think this video showing the interpolation of animations to 60fps using AI is a form of tweening, which I found pretty cool
"tweening" can be done with live action videos too as a fay to bump something up to higher FPS