Hi guys , I don't know if you benchmark already RIFE 4.25 4.9 .. with a tool like difference image frame by frame , but maybe I am wrong with this technique,
Anyway I compare frame by frame and the result :
magick compare -metric RMSE v1
the closer the result is to 0, the smaller the difference between two frames, and therefore the greater the sensation of fluidity.( sorry for my english I am french )
Result for the first 30 frames for the same video (video 1 RIFE 4.25 Heavymodel video 2 RIFE 4.9 ) frame by frame in 60 fps
What do you think?