The Complete Guide on How to Make a Video Slow Motion — Featuring UniFab Smoother AI

Slow motion video is one of the most captivating techniques in modern videography. It can turn ordinary moments into cinematic highlights, add emotional depth to a scene, or make sports, dance, and action sequences more dramatic. Whether you want to make video slow motion iPhone clips for social media or produce professional slow-mo footage for a project, understanding both the shooting and editing process is essential.

In this comprehensive guide, we’ll walk you through how to make a video slow motion, how to put a video in slow motion after it’s been recorded, and how to turn video into slow motion iPhone clips. We’ll cover both native iPhone tools and advanced software solutions, with a deep dive into UniFab Smoother AI, a powerful AI-driven program that creates ultra-smooth slow-motion results even from standard-frame-rate footage.

1. Understanding Slow Motion Video

Before learning how to make video slow motion iPhone style or on a computer, it helps to understand the principle.

Videos are made up of still frames displayed rapidly — usually 24, 30, or 60 frames per second (fps). Slow motion is achieved by:

• Recording at a higher fps (e.g., 120fps or 240fps) and then playing it back at standard speed (30fps).
• Or taking normal-fps footage and artificially slowing it down in editing software.

The first method gives you natural, smooth slow motion. The second can cause choppiness unless you use AI-based frame interpolation tools like UniFab Smoother AI to fill in the missing frames.

2. How to Do Slow Motion on iPhone

Apple’s iPhone has excellent built-in tools for both capturing and editing slow motion clips. Here’s how to use them, with keyword-rich explanations.

A. Recording Slow Motion Footage Natively

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1. Open the Camera app.
2. Swipe to the Slo-Mo shooting mode.
3. Tap the red Record button to start, and tap again to stop.
4. Your video is automatically saved as a slow-motion clip in the Photos app.

Pros: Natural motion, no post-processing required.
Cons: You must remember to switch to Slo-Mo mode before shooting.

B. Editing a Slo-Mo Clip in Photos

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If you shot your video in Slo-Mo mode, you can adjust which parts are slowed down:

1. Open the Photos app.
2. Select your Slo-Mo video and tap Edit.
3. At the bottom timeline, the narrow vertical bars represent normal speed; the wider-spaced bars are the slow-motion section.
4. Drag the sliders to adjust when the slow motion begins and ends.

C. Turning a Normal Video into Slow Motion on iPhone

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If you recorded at normal speed, the Photos app alone can’t create true high-quality slow motion — the frame rate is too low. However, you can still slow it down:

1. Use the free iMovie app from the App Store.
2. Create a new movie project and import your clip.
3. Tap the clip in the timeline, then tap the Speedometer icon.
4. Drag the slider to the left to reduce the speed (down to 1/8 speed).

The result will be slower, but without high fps capture or AI interpolation, it may look choppy — which is exactly where UniFab Smoother AI can help.

3. Enter UniFab Smoother AI — The Game-Changer

When you want to turn video into slow motion iPhone clips without sacrificing quality, or you have standard 30fps/60fps footage that you want to slow down dramatically, UniFab Smoother AI delivers.

What Is UniFab Smoother AI?

UniFab Smoother AI is an AI-powered video enhancement tool that specializes in frame interpolation — creating new frames between existing ones to make motion smoother when slowing down footage. It also offers denoising, sharpening, and resolution upgrades.

Why It’s Perfect for Slow Motion

1. AI Frame Interpolation: Converts 30fps or 60fps footage into 120fps.
2. Ultra-Smooth Results: Even extreme slowdowns look natural, with no jitter or ghosting.
3. Universal Format Support: Works with MOV, MP4, HEVC, and more — perfect for iPhone exports.
4. Simple Workflow: Beginner-friendly interface, but pro-level output.

How to Make a Video Slow Motion Using UniFab Smoother AI

Here’s a step-by-step example using iPhone footage:

Step 1: Transfer Your Video

• Connect your iPhone to your computer or use AirDrop to send the file.
• Ensure it’s in a common format like MOV or MP4.

Step 2: Install and Open UniFab Smoother AI

• Download from the official UniFab website.
• Launch the software and click Add Files.

Step 3: Set Frame Interpolation

• Select the Smoother AI mode.
• Choose your desired output frame rate (e.g., 240fps for 1/2 speed slow motion).

Step 4: Export the High-Frame-Rate Video

• Click Start and let the AI process your footage.
• Save the enhanced clip.

4. The Ideal Workflow: iPhone + UniFab

If you want maximum quality:

1. Record in iPhone Slo-Mo mode for action shots you know will be slowed down.
2. For spontaneous or missed Slo-Mo opportunities, record in regular mode.
3. Process normal-fps footage in UniFab Smoother AI to create a high-fps version.
4. Apply slow motion in editing software for cinematic results.

This hybrid approach gives you the flexibility to make video slow motion iPhone style instantly, while also having the power to turn video into slow motion iPhone clips later without quality loss.

5. Conclusion

Learning how to make a video slow motion is easier than ever, thanks to iPhone’s built-in tools and apps like iMovie. But when you need slow motion from regular footage — without choppiness — UniFab Smoother AI is the ultimate solution.

It bridges the gap between casual mobile shooting and professional-grade post-production. Whether you’re figuring out how to put a video in slow motion, how to slow motion a video iPhone, or transforming old clips into smooth cinematic sequences, UniFab Smoother AI ensures your final product is as fluid as if it were shot in true high fps.

With its AI-driven interpolation, noise reduction, and intuitive workflow, it’s the perfect companion for anyone serious about creating stunning slow-motion content — no matter where or how the footage was originally captured.