What is frame interpolation?

It generates new in-between frames so choppy low-FPS video plays smoothly. RIFE and DAIN are neural models that predict motion between two real frames and synthesise the frames in between.

What interpolation factor should I use?

The factor is target FPS ÷ source FPS. Whole-number factors (2×, 3×) interpolate cleanest. Non-integer ratios still work but the model must resample timing, which can introduce slight judder.

Will interpolation fix bad AI video?

It smooths motion but can amplify existing artifacts — morphing, warping, or flicker get interpolated too. Fix the source clip first, then smooth it.

How long does interpolation take?

Roughly proportional to the number of output frames and your GPU. The estimate here assumes a mid-range GPU at a few frames per second; faster hardware is quicker.

Frame Interpolation FPS Calculator

Frame interpolation FPS calculator

Many AI video models output low frame rates (8–16fps) that look choppy. Frame interpolation with RIFE or DAIN synthesises in-between frames to reach a smooth 24, 30, or 60fps. This calculator works out the interpolation factor, the total output frames, and a rough processing-time estimate.

How it works

The key number is the interpolation factor:

factor       = target_fps / source_fps
source_frames = source_fps × duration
output_frames = target_fps × duration
new_frames    = output_frames − source_frames

RIFE-style models double frames per pass (2×), so reaching an arbitrary target may take several passes plus timing resampling. The processing estimate assumes a mid-range GPU rendering a few interpolated frames per second.

Tips for clean interpolation

Prefer whole-number factors. 8→24fps (3×) or 12→24fps (2×) interpolate cleaner than odd ratios like 10→24fps.
De-artifact first. Interpolation amplifies morphing and flicker — clean the source clip before smoothing it.
Add subtle motion blur. A touch of blur on the output hides interpolation seams in fast motion.
Don’t over-smooth. Pushing 8fps straight to 60fps can look uncanny (“soap opera effect”); 24–30fps is usually the sweet spot for cinematic AI video.