Flowframes

Flowframes is a free, open-source Windows app for video frame interpolation. It creates new frames between your real ones, turning choppy footage into smooth slow motion or higher frame rates. You pick an AI engine like RIFE or DAIN, load a video, and it renders the in-between frames for you. It suits gamers, editors, and anyone fixing low-FPS recordings. The app is free under the GPL-3.0 license. A supported graphics card is needed for the fastest results. Check the GitHub repo for download links and setup notes.

Key Features

1. RIFE and DAIN Engines

Choose between two AI interpolation models. RIFE is fast and modern; DAIN handles tricky motion in older footage.

2. Slow Motion Creation

Turn normal clips into smooth slow motion. The AI fills the gaps so movement stays fluid at any speed.

3. FPS Boosting

Raise a 30 FPS video to 60 or 120 FPS. Games and screen recordings look much smoother after processing.

4. Simple Windows GUI

No command line is needed. Pick your file, choose a model, and press start in a clean desktop window.

5. NCNN and CUDA Support

Run on NVIDIA cards with CUDA or on other hardware with NCNN. Pick the backend that fits your machine.

6. Batch Processing

Queue up many videos at once. The app works through the list while you do other things.

Frequently Asked Questions (FAQ)

What does frame interpolation do?

It creates new frames between existing ones. This makes motion look smoother and lets you slow video down cleanly.

Which model should I pick, RIFE or DAIN?

RIFE is faster and better for most new footage. DAIN can handle some old or unusual motion that RIFE misses.

Does Flowframes work on Mac or Linux?

No. It is built for Windows only. Linux and Mac users can run RIFE models through other tools like chaiNNer.

How long does processing take?

It depends on your GPU and output settings. A short clip can take minutes; long 4K videos take much longer.

What’s the difference between RIFE CUDA and RIFE NCNN?

The results are identical. NCNN runs on any Vulkan-capable GPU including AMD, while CUDA works only on Nvidia — on Nvidia, CUDA is faster.

Conclusion

Flowframes is the easiest free way to add smooth slow motion on Windows. It wraps powerful AI models in a simple app anyone can run. You need a decent graphics card for speed, but the results beat basic frame blending. Gamers and editors will get the most from it. Batch queuing makes it practical for whole folders of clips.