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Framer is an interactive video frame interpolation method that leverages large‑pretrained video diffusion models, allowing users to define custom motion trajectories or use an automatic mode, and demonstrates strong performance in image deformation, video generation, and cartoon‑to‑video applications.
This article explains video frame interpolation, compares algorithm categories, and deep‑dives into Kuaishou’s KFRUC method—covering its hybrid motion estimation, occlusion detection, and motion compensation techniques that enable smooth slow‑motion playback without stutter.
During the World Cup, Youku used a frame‑rate‑up‑conversion algorithm that synthesizes intermediate frames by combining block‑based motion estimation, optical‑flow refinement, and a rule‑based plus deep‑learning fusion, enabling smooth 25→50 fps video and preserving fast‑moving objects such as a football.