Watec Camera Viewer (Browser version) Operation Manual

1. Overview

This tool is a browser-based viewer that uses WebRTC to preview video and adjust image quality for Watec USB cameras connected to a PC. No application installation is required.

All video and still image data captured by this viewer are saved locally on the user's PC and are not transmitted to any external server.

2. Verified Operating Systems

Windows 10 / 11
macOS 26.1 Tahoe (video preview only; UVC controls are limited)
Linux (Ubuntu 24.04 LTS)

Unsupported Operating Systems

Android
iOS

3. Recommended Browsers

Google Chrome
Microsoft Edge

4. How to Launch

4.1 Camera Permission Screen

When launching the viewer for the first time, the browser will request permission to access the camera.

Click [Allow] to proceed
If [Block] is selected, video will not be displayed

Even when opening the HTML file locally, camera permission is required due to WebRTC specifications.

5. Video Preview

5.1 Device Settings

Confirm that the camera you want to preview appears in the camera list
Select the resolution (e.g. 1920 × 1080)
Set the frame rate as required
Click [Start Preview]
If prompted again, click [Allow] to grant camera access

5.2 Live Preview

Once preview starts, the real-time video will be displayed on the left side of the screen.

6. Image Quality Adjustment (UVC)

6.1 Image Adjustment Panel

On supported browsers, the following image parameters can be adjusted in real time:

Exposure
Gain
White Balance
Brightness
Contrast
Saturation
Sharpness

If a browser does not support a specific parameter, the corresponding control may be disabled or hidden.

7. Recording and Still Images

7.1 Control Buttons

While preview is active, buttons for recording and still image capture are displayed in the device settings panel.

Button	Description
Snapshot	Saves the current video frame as a still image.
Start Recording	Starts video recording. The button display changes during recording.
Stop Recording	Stops recording and saves the video file.

Recording and snapshot functions require browser support for the MediaRecorder API.

7.2 Saving Still Images

Format: PNG
Save location: Browser default download folder
Example filename: snapshot_2025-01-01_12-34-56.png

The resolution of still images depends on the preview resolution.

7.3 Video Recording

Format: MP4
Save location: Browser default download folder
Example filename: record_2025-01-01_12-45-00.mp4

7.4 Notes on Recording

CPU usage may increase during recording
High resolution or high frame rate settings may cause recording to stop
Maximum recording duration depends on browser and PC performance

All recorded videos and still images are saved locally and are not uploaded to any external server.

8. Troubleshooting

Issue	Cause	Solution
Camera does not appear in the list	Camera is not connected or not recognized by the OS	Check the USB connection and verify device recognition in the OS
No video is displayed	Camera access is not permitted	Change camera permission to “Allow” in browser settings
Resolution cannot be selected	The camera does not support the selected resolution	Select a resolution supported by the camera
Image quality controls are unavailable	The camera does not support UVC controls	Only supported parameters can be adjusted
Recording cannot be started	Unsupported browser or preview not started	Use the latest Chrome / Edge / Safari and start preview first
MP4 file is not saved after recording stops	Download blocked or high system load	Check browser download settings or lower resolution/frame rate

9. Disclaimer

This software and this guide are provided on an “as is” basis.

No responsibility is assumed for any direct or indirect damages resulting from the use or inability to use this software.
No guarantee is provided regarding the accuracy or completeness of captured video or image data.
Operation depends on the OS, browser, USB camera, and system configuration, and is not guaranteed in all environments.
Contents of this guide are subject to change without notice.

By using this software, you are deemed to have agreed to the above disclaimer.

10. Version Information

Item	Details
Software Name	Watec Camera Viewer (Browser version)
Version	v1.00
Release	Initial release