This project is for a museum video installation so the hardware and screen will be controlled. I’ve done some tests and a powerful gpu card can output 120fps without dropping frames at 1080P if I use an a codec that is not cpu intensive (according to VLC player). But I’m just in the proof of concept phase so I’m not sure about 4K yet.
The video is a brainwave experience. The video itself does not have to be 120fps (although it can be), but the flickering I induce with an AE opacity expression does need to playback at 120 to work.
I just don’t know how to replicate the expression (other than manually – which would take forever) in another effects program. But if someone knows of one, I would be excited to try it out for this project.