Quest VR Gameplay footage advice

Any advice for upscaling and framerate adjustment for VR gameplay captured footage? I need to upscale from 1920x1080 to 4k and conform variable frame rates (37fps - 45fps) to 30fps.

VR footage is notoriously shaky but this has been (mostly) solved by Meta Quest’s in-headset camera stabilizer setting. So it does not need stabilizing.

The best results I got was from upscaling to 4k and setting framerate to 30fps first. Then processing the footage a second time to stabilize. Doing it all at one took so long that it was prone to fail.