Motionline

Capture Every Move

Analyze your sports form by extracting frames from video, isolating motion, and creating strobe photos for detailed review.

How to Use

1

Select or Record a Video

Choose a video from your photo library, or record a new one directly in the app. Ideal for capturing swings, throws, jumps, or any repetitive motion.

2

Configure Settings

Adjust the frame interval to control extraction density. Optionally trim the video range, enable person segmentation to isolate the subject, choose background color, or flip the image horizontally.

3

Start Analysis

The app extracts frames at your chosen interval. If "Auto Skip Similar Frames" is on, near-duplicate frames are automatically removed, keeping only meaningful motion changes.

4

Review & Select Frames

Browse the extracted frames in a scrollable strip. Tap to select the key frames you want to keep. Use the grid overlay for alignment reference.

5

Export

Create a strobe photo (grid composite), export as MP4 video, or save individual frames. Share your results via the system share sheet or save directly to your Camera Roll.

Settings

Frame Interval

0.01s–0.5s. Controls how many frames are extracted.

Trim Range

Select start/end points to focus on a specific part of the video.

Person Segmentation

AI-powered background removal using Apple Vision. Choose your background color.

Auto Skip

Automatically removes near-duplicate frames for cleaner results.

Quality

Standard or High resolution for frame extraction.

Mirror

Horizontal flip for left-right comparison analysis.

Export Options

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Strobe Photo

Grid composite of selected frames in a single image. Customize columns, show frame numbers and timestamps.

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MP4 Video

Create a slow-motion video from selected frames. Save to Camera Roll or share.

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Share

Send results to any app via the system share sheet.