How to Fix Choppy Slow Motion (Make Any Slow-Mo Smooth, 2026)

Why your slow motion is choppy

Slow motion is simple math with an ugly failure mode. Say you shot at 30 frames per second and slow the clip to 25% speed. Your player now needs 120 frames for every second of original footage — but you only recorded 30. The editor has two bad options: show each frame four times (stutter) or blend neighbouring frames together (ghosting). Either way, the result feels like a slideshow, not the buttery slow-mo you pictured.

That’s why phones have a dedicated slo-mo camera mode: it records at 120 or 240 fps so there are enough real frames to play back slowly. If you didn’t shoot in that mode, the frames simply don’t exist.

The fix: generate the missing frames with AI

Modern frame-interpolation models (the RIFE family and similar) can synthesise the frames you didn’t shoot. The AI looks at two consecutive frames, estimates how every pixel moved between them, and renders new intermediate frames along that motion path. Slow the result down and it stays smooth — because now there are 120 real-looking frames per second.

This is the same technology behind 60 FPS conversion; slow motion just points it at a different goal. Instead of “same duration, more frames per second,” you get “longer duration, same smoothness.”

How to do it (2 minutes, in the browser)

1. Open the AI Slow Motion tool.
2. Upload the clip you want to slow down — normal footage from any phone or camera works; no special slo-mo mode needed.
3. Choose the slowdown: 2× is subtle and safe, 4× is the full cinematic treatment.
4. Preview the result side by side with the original, then download if it looks right.

Processing runs on our GPUs, so it works the same from a phone, a Chromebook, or a locked-down work laptop. Trying it is free — you only spend credits when you download the full-quality file.

What slow motion works best on

Interpolation is at its best when motion is continuous and visible:

• Sports and action — a skate trick, a dog catching a ball, a dive.
• Drone and driving shots — smooth camera motion interpolates almost perfectly.
• Hair, water, fabric, smoke — the classic cinematic subjects.

It struggles when the original frames don’t contain enough information: extreme motion blur, strobing lights, or things that appear and disappear between frames (fast confetti, rain close to the lens). If your source is 24 fps film with heavy blur, temper expectations — the AI can’t recover what was never captured.

Pro tips for better results

• Slow the raw clip, not an export. Every re-encode costs quality; feed the interpolator your cleanest file.
• Combine with 60 FPS output. Slowing 4× and outputting 60 fps gives the smoothest possible result — that’s the default in our tool.
• Cut first, then slow. Interpolate only the moment you want slow; it processes faster and avoids interpolating across scene cuts.
• Stabilize shaky footage first with the video stabilizer — interpolation amplifies camera jitter because it faithfully smooths the shake too.

If you’d rather change playback speed without generating frames (chipmunk-style speed-ups, simple 0.5× slowdowns), the plain speed changer does that instantly in your browser. And for the full background on interpolation itself, see How to Make a Video 60 FPS.