Yes, RIFE is completely free and open-source under the MIT license.

A GPU is strongly recommended. RIFE achieves 30+ FPS on a 2080Ti. CPU-only mode exists but is very slow.

Can I use it with a GUI?

Yes, FlowFrames and SVFI provide GUI wrappers around RIFE for easier use.

AI Video ToolsHubUpdated Feb 2026

Back to Rankings

RIFE

Open-source AI frame interpolation for smooth slow motion and higher frame rates

Best for: Frame Interpolation

7.5

Overview

RIFE (Real-Time Intermediate Flow Estimation) is an open-source AI model for video frame interpolation. It generates realistic in-between frames to create smooth slow motion or convert low frame rate footage to high frame rates. Widely used in post-production and anime upscaling, it achieves 30+ FPS on a 2080Ti GPU.

Video Demo

Ultimate Video Editing Guide60:00

Detailed Scores

Ease of Use

5.5

Video Quality

8.5

Avatar Quality

Voice Quality

Value for Money

Features

Pros

Completely free and open-source (MIT license)
Excellent frame interpolation quality
30+ FPS real-time on modern GPUs
Multiple optimized model versions
Works with FlowFrames and VapourSynth

Cons

Requires technical setup (Python/command line)
Needs a decent GPU for good performance
No GUI out of the box
Only does frame interpolation (single purpose)

Key Features

AI Frame InterpolationArbitrary TimestepReal-Time ProcessingMultiple Model VersionsAnime-Optimized ModelsNCNN/Vulkan SupportFlowFrames IntegrationVapourSynth Plugin