Smooth Slow Motion
Create smooth slow motion by interpolating new frames. Unlike simple speed reduction which duplicates frames, AI interpolation generates natural in-between frames for fluid slow-mo.
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How to Use Smooth Slow Motion
- Upload your video file — MP4, MKV, MOV, and other formats are supported
- Choose the target frame rate — 24 FPS for film look, 60 FPS for smooth playback, 120/240 FPS for slow-motion
- Select Fast or Best Quality AI mode
- Click Process — processing time estimate shown before you start
- Download the smooth, high-FPS video
Features
- AI-generated intermediate frames for smooth slow motion
- No frame duplication — natural motion between keyframes
- Combine with speed reduction for ultra-smooth slow-mo
Frequently Asked Questions
- What is frame interpolation?
- Frame interpolation generates new frames between existing ones using AI motion estimation, creating smoother playback without duplicating frames. We use RIFE v4.26, a state-of-the-art neural network for frame interpolation.
- Why is this tool popular for anime?
- Anime is typically animated at 24fps or lower. Frame interpolation creates the silky smooth 60fps look popular on YouTube anime edits. RIFE AI handles anime particularly well since it was trained on diverse motion patterns.
- What can I do with 240 FPS?
- 240 FPS lets you create stunning slow-motion. Play back at 30fps for 8x slow-mo, or 60fps for 4x slow-mo. Perfect for sports highlights, dance videos, and cinematic moments.
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- What's the difference between 120 and 240 FPS?
- 120 FPS is ideal for ultra-smooth playback on 120Hz displays (gaming monitors, newer phones). 240 FPS is for slow-motion — the extra frames give you more flexibility to slow down footage while keeping it buttery smooth.
- Will this increase file size?
- Yes, more frames means a larger file. A 4x FPS increase roughly quadruples the file size. You can use our Compress Video tool afterward to reduce file size while keeping the smooth motion.