I would like to make custom blender transitions similar to the first second of this video https://www.youtube.com/watch?v=mZvQ9ipTK_8
I know that in reality, it's a transition executed outside the rendering engine, added to the editing software. But I'm trying to find out if it's possible to get the same effect (with the nice animation curve that makes the transition visually beautiful) under blender, if so, how to do it?
As you can see, the effect is not as convincing, and there is a zoom that remains persistent.
I would be happy to have a realtime (or cycle calculated) but not copositor effect as the compositor can't give good real time feedback.