Dual View Recording

The Way to Win

A Sign of Progress

VEWGN

Multi-View Video Recorder

Introduction

VEWiGN is a multi-view video recorder realized using only the devices you have at hand. It supports your performance improvement in all scenes where you want to analyze movements from multiple angles, such as sports form checks, dance practice, and rehabilitation records.

1. No Special Equipment Required

No expensive cameras or dedicated transmitters are needed. Just prepare one or two smartphones or tablets you usually use, and you can start multi-angle recording and analysis immediately.

Works with any combination of iOS / Android.

Your devices become professional-grade analysis equipment

2. Record Without Worrying About Data Costs

Are you worried about data consumption when sending and receiving large video data? VEWiGN adopts a technology called P2P (Peer-to-Peer).

This is a mechanism where terminals exchange data directly. By connecting two devices to the same Wi-Fi router (access point), you can share high-quality video without using much of the external internet line and without worrying about packet limits.

Minimal data communication occurs for initial connection establishment (signaling), but the video data itself during recording is sent and received directly within the local network.

Data arrives directly, making it fast and secure

Quick Start

Step 01

p2p

Pairing

Connect two devices in the Recording Room and decide on the camera angles.

Step 02

video_camera_front

Start Recording

Start recording. Video from both devices is automatically synchronized and saved on the host device.

Step 03

sports_gymnastics

Form Analysis

Check your form with slow-motion playback or AI pose detection, and write lines or notes for analysis.

Step 04

SNS Sharing

Export analysis data as a video. Use it for uploading to SNS or sharing.

Home Screen

This is the main screen displayed when you launch the app. You can access two major functions and settings.

Simple and intuitive main menu

                    
                                videocam Recording Room
                            
Start a new recording session. Recording with one device or multi-angle shooting with two devices is possible.

                                video_library
                                Video Analysis (Library)
                            
Manage recorded videos, import external videos, and perform detailed analysis (playback, drawing, AI detection).

                                settings Settings
                            
Configure image quality, remote control settings, and check app information.

                                help Help
                            
Display this user manual.

Recording Room

The main feature where you can photograph sports or movements by combining one or two devices.

Basic Operations

                        
                                    radio_button_checked
                                    Record Button
                                
Starts and stops shooting.

                                    mic Mic ON/OFF
                                
Toggles voice recording on/off (cannot be changed during recording).

                                    cameraswitch Switch Camera
                                
Switches between front and rear cameras.

                                    av_timer Metronome
                                
Shoot according to the specified tempo. In environments where sound is hard to hear, you can check the rhythm with visual effects.

                                    flip Mirroring
                                
Flips the video horizontally. Useful for checking during selfies.

                                    video_library
                                    Library (Video Analysis)
                                
If you want to check a video immediately after shooting or check a previously shot video, you can access the video library from the icon at the top of the screen without returning to the home screen.

Shooting screen with one device

lightbulbOther Useful Operations

Pinch Operation (Zoom/Pan) pinch

You can zoom the video by pinching with two fingers on the preview image. While zoomed, you can freely move the display position (pan) by dragging with one finger.
This operation applies only to the preview display, and the range of the recorded video itself is not changed.
Remote Shutter settings_remote

Using connectable devices you already have, such as a Bluetooth remote, mouse, or keyboard, you can start and stop recording from a distance. Very useful for self-shooting using a tripod or operating the secondary (guest) device from a distance.
To use, configuration in 'Settings > Recording Room Settings > Remote Shutter' is required.
Visual Recording Effects light_mode

Can display effects that visually emphasize that recording is in progress (e.g., red frame blinking on the screen border). Helps to see at a glance if recording has started normally, even during self-shooting from a distant location.
To use, configuration in 'Settings > Recording Room Settings > Visual Recording Effects' is required.

Multi-Angle Shooting with Two Linked Devices

Connect two devices to check both camera images side-by-side while recording simultaneously.

Multi-angle shooting

Step 1

add_to_queue Invite

On the first device (host), tap [Invite]. A QR code will be displayed on the screen, waiting for the guest device to connect.

Step 2

On the second device (guest), tap [Join], then read the QR code displayed on the host or select the target device from 'Registered Hosts'.

Step 3

lan

After connecting, check that the network indicator at the top left of the screen lights up 'green', indicating a stable communication state.

Step 4

radio_button_checked

Press the record button to start synchronized recording from both cameras. When you stop recording, both videos are saved simultaneously.

lightbulb Useful Features

Dual View Settings display_settings

You can switch between 'Split Mode' (sharing the screen top/bottom or left/right) and 'PiP Mode' (displaying one as a small overlay) to suit the situation.
Share Host Video cast

You can display the host's camera image on the guest's screen in real-time. Useful for collaborative angle checking from distant locations.
Register Frequently Used Hosts star

If you register hosts you usually use, you can skip reading the QR code next time and easily reconnect just by selecting from the list.
Registering a host is done in 'Settings > Recording Room Settings > Dual-Camera Recording'.

warning

Please Pay Attention to Connection State

The warning state shown on the right may consume a large amount of data, so immediate [Disconnect] is recommended depending on your data plan.

Warning

public

Recommended Action

link_off Disconnect

expand_circle_down Check Reason and Technical Details

If the network indicator at the top left of the screen is a yellow earth icon, it's highly likely that P2P connection is being made via an internet line instead of direct communication within Wi-Fi. This state can consume a large amount of data traffic (throttling) for transferring video data, so please [Disconnect] immediately to avoid hitting your data cap. Then, verify that both devices are on the same Wi-Fi and can communicate with each other on the local network.

Analyzes P2P (WebRTC) statistics in real-time and displays 'yellow (warning)' if any of the following apply:

Connection type is relay (via TURN server).
Connection type is srflx / prflx (NAT traversal by STUN).
Even if connection type is host, the IP address used is not within the private IP range.

By these, it highly accurately warns users about unintended packet consumption via mobile data communication or global IP.

Video Library

A screen for managing and selecting recorded videos or videos imported from outside. Recorded videos are displayed as 'Video Sets' in card format, and you can check the content with 1 or 2 screen thumbnails.

Basic Operations

                        
                                    add Create New
                                
From the [+] button at the bottom right of the screen, you can import existing video files (MP4, MOV, etc.) into the library.

                                    edit Edit
                                
Change titles or re-select videos.

                                    delete_forever Delete
                                
Delete sets you no longer need. Long-pressing a card allows you to select multiple sets and delete them all at once.

                                    sort Sort
                                
Sort video sets by date (newest/oldest) or title from the icon at the top right of the screen.

                                    cloud_upload
                                    Export Data
                                
Export selected video sets in VEWiGN proprietary format (ZIP). Used for migration to other devices or backups.

                                    cloud_download
                                    Import Data
                                
Import data backed up in VEWiGN proprietary format (ZIP) from the icon at the top right of the screen.

List display of video sets

lightbulb Data That Can Be Imported into Video Sets

Select from Gallery photo_library

Select videos from the device's standard photo album.
Select from Files folder

Select videos from the 'Files' app or cloud storage.
Pick from App video_library

Re-use video footage from other video sets already in the library to create new ones.

All imported video data is saved as a copy within the app. Editing or deleting the original file (e.g., photo album) will not affect the data within the app, but it will consume storage space on the device by the amount imported.

Video Analysis

A screen for checking recorded videos frame-by-frame or analyzing in detail using drawing tools and AI.

Multi-functional video analysis

Basic Operations

                            
                                        play_arrow
                                        Simple Playback
                                    
Use the control bar at the bottom of the screen to play, pause, and move the playback position using the seek bar. When there are two videos, they are always controlled in synchronization. Also, if video 1 and video 2 have different lengths, the overall playable range follows the length of 'Video 1'.

                                        repeat
                                        Loop (AB Repeat)
                                    
Repeatedly play a specific section (from point A to point B) to check intensely.

                                        speed Playback Speed
                                    
Adjust from 0.25x slow motion to 2.0x fast, depending on the situation.

lightbulb Other Useful Operations

Dual View Settings display_settings

Switch between top/bottom, left/right split display and PiP mode overlay to suit the analysis scene. During PiP display, sub-screen transparency can be adjusted, allowing you to overlay two images and compare subtle differences in form.
Mute Audio volume_off

Mutes the audio of the video being analyzed.
The default ON/OFF state can be changed in 'Settings > Video Player Settings > Audio Output'.

If a video without audio data is loaded, the mic_off icon will be displayed.
Correct Video Orientation mobile_rotate

If the loaded video is sideways or upside down, you can rotate it in 90-degree units to the correct orientation.
Mirror View flip

Flips the image horizontally. Useful for correcting dominant hand or comparing with model videos.
Video Zoom/Pan drag_pan

Zooming and moving (panning) the image is possible with intuitive finger operations. Operation can be toggled ON/OFF to prevent unintended manipulation from accidental taps.
Video Angle Adjustment crop_rotate

Along with zoom/pan, you can finely adjust the video angle. Corrects subtle tilts to improve analysis accuracy. This can also be toggled ON/OFF to prevent unintended manipulation.
Reset Video fit_screen

Resets zoom, pan, and angle adjustment states to default.

High-Precision Playback Control

Operation by jog dial

                            
                                        laps Jog Dial
                                    
By tracing the circular controller, you can intuitively perform frame-by-frame forward or backward movement.

                                        sync_alt Offset Adjustment
                                    
You can shift two videos in millisecond units to perfectly synchronize the moment of impact or start timing.Switch between 'Seek' (moving playback position) and 'Offset' modes using the button at the top right of the jog dial.
Data recorded with this app saves video and audio independently. If there's a discrepancy in audio data, fine adjustment of audio timing can also be performed with the offset adjustment tool.

Advanced Grid Drawing

Displays equally spaced auxiliary lines on the screen. Used for fixed positioning or horizontal/vertical line checks. Position and angle can be finely adjusted according to analysis goals.

                            
                                        grid_4x4
                                        Display Mode and Density Adjustment
                                    
In addition to simple 2D grids, switching to a 3-Dimensional Space Grid is possible. The density of reference lines can also be changed to suit the application.

                                        camera_enhance
                                        Position, Wall, and Camera Adjustment (3D only)
                                    
In 3D mode, the grid's position, surrounding walls (surfaces), and camera perspective angle can be finely adjusted to the video.Each adjustment parameter unit is based on relative values where the grid cell width/height is '1.0'.

                                        cleaning_services
                                        Grid Eraser (3D only)
                                    
Specific parts of the grid can be erased by tracing. Only parts that overlap with the subject and are hard to see can be pinpointed and removed, so it doesn't interfere with analysis.

                                        visibility
                                        Toggle Visibility
                                    
Toggle the entire grid display ON/OFF with a single tap while maintaining settings.

Advanced grid drawing

Versatile Paint Tools

Lines and shapes can be drawn directly on the video to visualize the form's axis or movement trajectory. High-precision analysis is supported through various tools and use of multiple colors.

                            
                                        edit
                                        Abundant Drawing Tools
                                    
Straight lines, arrows, circles, rectangles, parallel lines, and a pen tool for free-form writing can be placed intuitively.

                                        architecture
                                        Measurement and Emphasis Tools
                                    
Equipped with an 'Angle' tool to measure the angle between two lines, 'Focus' to highlight areas of interest, and 'Text' tools to write down important points.

                                        palette
                                        Color Variations
                                    
By using multiple colors (color palette), differences between comparison targets (e.g., professional vs. self, past self vs. current) can be visually clarified.

                                        undo
                                        Undo & Redo
                                    
Undo/Redo for drawing is of course supported, along with an eraser to remove specific parts and bulk clearing of unneeded shapes.

Versatile paint tools

Pose (AI Skeleton Detection)

AI automatically tracks person's joints in the video and displays a skeleton model. Form breakdowns or movement mechanisms can be visualized as objective data.

                            
                                        accessibility_new
                                        AI Automatic Detection and Visualization
                                    
AI analysis starts with a single button. Shoulder, elbow, hip, knee, and other major joints are automatically detected, and movements are converted to a skeleton model in real-time.

                                        layers
                                        Three Display Modes
                                    
Switch between 'Overlay' (layering on image), 'Skeleton only', and 'Video only' modes. Convenient when you want to check the essence of the movement.

                                        tune
                                        Afterimage/Display Customization
                                    
The length and opacity of 'afterimages', which allow checking of movement trajectories, can be adjusted. Specific joints or lines can also be set to show/hide individually.

                                        palette
                                        Color and Detailed Settings
                                    
Skeleton colors and line thickness can be freely changed. Customizable to an easy-to-see color scheme according to the background video colors.

Settings for AI skeleton detection (Pose)

tune Effect Settings

Afterimage Duration history

Sets the time to display the skeleton from past frames to the present as a 'trajectory'. Effective for capturing movement arcs and form changes visually.
Afterimage Density opacity

Adjusts the density of the afterimage. Darkening makes the flow of movement clear, while lightening helps focus on the current posture and image overlay.
Smoothing auto_awesome

Suppresses small fluctuations that occur per frame unique to AI analysis, and adjusts for smoother skeleton movement.
Person Filter person_search

Adjusts to detect only the central person if skeletons are detected other than the target person or if background noise appears.

Other Features

edit_document Note

Points noticed during analysis or instruction content can be recorded as text. Input content is automatically saved for each video set.
cloud_upload Export (MP4 Writing)

To allow playback in environments other than this app, you can export as a single video file including grid, paint, and pose overlays. You can choose which items to include at export time. Ideal for SNS posting and sharing.

Settings

Customize app operation, image quality, external device linkage, appearance, etc. Settings are divided into three categories: 'Recording Room', 'Video Player', and 'Application Information'.

Recording Room Settings

Configure operations and image quality related to shooting.

settings_suggest Video Encoder

Specify the video compression format. 'Auto' is recommended, but if recording is unstable on a specific device, manual switching to 'Software' or 'Hardware' may improve it.
high_quality Image Quality

Select the optimal image quality preset for the shooting scene. Options like 'Action/Form Check' for high-speed movements or 'High Quality' for high-definition recording are available.
mic Enable Mic by Default

Sets whether the microphone is ON or OFF by default when entering the Recording Room.
videocam Default Camera

Select the default camera (front or rear) to use when entering the room.
settings_remote Remote Shutter

Assign Bluetooth remote or mouse button inputs to start/stop recording operations. Features a learning function to automatically recognize keycode differences for each OS and device.
light_mode Visual Recording Effects

Toggle visual effects like a red frame blinking on the screen border during recording. Helps to easily check recording state from distant self-shooting.
phonelink_setup Dual-Camera Recording

Perform pairing settings for devices performing simultaneous recording. Registered devices can be connected simply by selecting from the list next time without reading a QR code.

Video Player Settings

Customize playback/analysis behavior.

volume_up Audio Output

Initial audio setting when opening the analysis screen. Choose from 'Always start OFF', 'Always start ON', or 'Maintain previous state for each video'.

Application Information

Configure overall app design and check information.

language Localization

You can select the language used for display in the app. By default, the language is automatically selected according to the device's system settings, but if the app does not support the language, it will be displayed in English.
palette Color Theme

Change the app's color scheme (skin). Choose from dark mode or sport-specific color palettes to make the app look just the way you like.
info Version / License

Check the currently installed app version and refer to license information for open-source libraries used in this app.

diamond About the Pro Plan

VEWiGN offers most features, such as multi-angle recording, AI analysis, and versatile drawing tools, for free. For those who need more video analysis or permanent data management, we offer the 'Pro Plan' that unlocks the following limitations.

Feature/Limit	Free Plan	Pro Plan
Recording Time Limit	1 min / session	Unlimited
Library Storage Limit	Up to 3 sets	Unlimited
Backup Feature (ZIP Export/Import)	Not Available	Available
Watermark on Video (VEWiGN logo)	Present	None

By upgrading to the Pro Plan, all these constraints are removed, allowing use as a professional-grade tool for sports instruction beyond personal practice. Upgrading can be done from the banner at the top of the settings screen.

Frequently Asked Questions (FAQ)

A collection of common questions and answers about VEWiGN usage and features.

p2p Is a separate dedicated device like a Wi-Fi router needed to connect two devices?

expand_more

No, connection is possible without a dedicated router. By utilizing the smartphone's 'Tethering (Personal Hotspot)' feature to make one device an access point, you can link two devices regardless of the location, such as outdoors.

*Setting methods may differ depending on device models and OS combinations.

public Will using it outside consume a large amount of data (traffic)?

expand_more

If the network indicator at the top left of the screen is a 'green' icon (direct communication), it sends video directly between terminals without passing through an internet line, so data traffic is hardly consumed. If a 'yellow earth icon' is displayed, it's via internet (relay communication) and large amounts of data are consumed, so we recommend reviewing your connection environment.

report_problem The app crashes during recording or saving fails.

expand_more

First, check if there is sufficient free storage on the device. Also, when using older terminals or under high-load situations, the app may terminate abnormally. Try switching 'Settings > Recording Room Settings > Video Encoder' to 'Software', as it may stabilize operation.

settings_remote The remote shutter doesn't respond well.

expand_more

Check the Bluetooth connection state. Even if already paired, behavior may change due to OS updates. Please perform the button learning again from Settings > Recording Room > Remote Shutter to re-recognize the current input.

sync_alt I want to sync the timing of two videos.

expand_more

Subtle delays in the recording environment may cause discrepancies between the two images. By using the 'Offset' tool in the video analysis screen, playback timing can be perfectly synchronized in millisecond units. Once set, sync information is saved for each video set.

cloud_sync Can I transfer my data when switching to a new device?

expand_more

The Pro Plan allows for 'Data Import/Export' features. By exporting video sets in VEWiGN proprietary ZIP format and reading them on the new device, manual data migration is possible.

devices_other Can iPhone and Android be used mixed?

expand_more

Yes, it is possible. Even if the host is an iPhone and the guest is an Android (or vice-versa), they can be paired for multi-angle recording.

accessibility_new It takes time to create AI pose data.

expand_more

AI analysis maximizes the device's computing power, so completion time depends on the terminal's processing performance. To shorten analysis time, specify only the necessary range using the 'Loop' feature before running analysis. This bypasses analysis outside the specified range, allowing efficient processing.

cloud_upload MP4 export takes time.

expand_more

Exporting involves rendering (compositing) video within the terminal, so it's affected by video length and terminal performance. To export in a short time, narrow down only the necessary section with the 'Loop' feature before executing export.

security Please tell me about the permissions required by the app and data handling.

expand_more

The app uses the following permissions necessary for operation:

Camera/Mic: Used for video and audio recording.
Photos/Library: Used for saving recorded videos and reading external videos.
Network (Wi-Fi/Mobile Data): Used for connection information exchange and relay communication when linking two devices. iOS also uses 'Local Network' permission for P2P communication.
Bluetooth (Android only): Necessary for using Bluetooth equipment with remote shutter. On iOS, Bluetooth equipment can be used as a remote without additional permission.

Captured video and audio data are used only for display, editing, saving within the app, and export operations by the user themself.

It is never sent to external servers including the developer, nor used for purposes other than app functional provision.

slow_motion_video I want to record 120fps video for detailed analysis.

expand_more

Since VEWiGN is based on browser technologies (WebRTC), the maximum recording frame rate within the app is 60fps. To analyze high frame rate videos like 120fps, you can record using your device's native camera app and then import the video into VEWiGN via the 'New Video Set (+)' in the Video Library.

fullscreen The analysis screen feels cramped and cluttered.

expand_more

Tapping the video area on the screen switches to 'Full-screen Display', allowing you to focus on the footage with minimal UI elements. You can tap again to restore the original view. Additionally, switching the jog dial to mini display allows you to maintain control while keeping the screen clear for analysis.