Just tried playing the file in MPC (Media Player Classic) and yes, it does seem to play those files fine at 90 or 120 FPS. Playing them in Whirligig doesn't seem to work. Changing from 3d to 2d provided a BIG speed increase, (from .5 to .75 on 5400 x2700) but it still isn't fast enough.
The other options (Using Nvidia Cuvid, Nvidia Optical Flow turned on) were already set.
3840 x 1920 files can be played just fine. It seems the others are just too big for Whirligig to Smooth out.
Any suggestions on how to get Whirligig to work with files of such enormous size? Or is the overhead of using VR players too much?
I'm currently transcodeing a 5400x2700 video to 120FPS and getting roughly 11FPS using NVENC. Does that sound about right?