Capture 4K resolution video of gameplay automatically using only blueprint?

I have a Camera actor blueprint that is created by the Player Controller automatically when the game starts. Then I move that camera around using Timeline and other stuff in blueprint.
What I’m trying to do is:
1- trigger 4K video capture as seen from the RTS cam with Event Begin Play
2- and then stop the capture before the game quits also from the blueprint
How can I do 1&2?

p.s. if 4K is not possible, I’m OK with 1080p too