After several tests and discussions with the FlowFrames developer, we came to the conclusion that RIFE (the frame interpolation engine used by FlowFrames, RIFE-App, Waifu2x, etc) doesn't really do a better job than the realtime interpolation solution offered by DmitriRender (
http://www.dmitrirender.ru ), which is a truly amazing DirectShow filter that not only does the interpolation in realtime, but is ultra fast and allows instant fast forward and rewind even on 4K content and supports DXVA , D3D9 and D3D11 hardware acceleration, and even HDR and 3D.
Of course it is MUCH better than SVP too.
So from now on, my
AI Remasters will keep the original framerate of the source files, and I
STRONGLY recommend you all try and see for yourselves how amazing
DmitriRender is. It's simply the best $15 I've spent in my whole life.