Kmbox Nvideo 3-in-1 Hardware System | HDMI Video Capture Card + Input Control Interface + USB 3.0 High-Speed Device

Usage Notice

This product is provided as a hardware-only solution designed for general computing, development, and research purposes.

No software, firmware, or application-specific tools are included with this product. Users are expected to have the necessary technical knowledge to operate and integrate the hardware within their own environments.

Please ensure that all usage complies with local laws and regulations. This product is not intended for any unauthorized or improper applications.

By purchasing and using this product, you acknowledge that all usage scenarios are under your own responsibility. The seller does not participate in, support, or assume liability for any third-party implementations or use cases.

What is Nvideo?

Kmbox Nvideo is a multifunctional 3-in-1 hardware system that integrates input control, video acquisition, and signal conversion into a single device.

It combines:

• Network-based Input Control Module
  – Hardware-level keyboard and mouse signal management
• Video Capture System (with Loop-Out)
  – Real-time HDMI signal acquisition and display output
• Input Interface Converter
  – Enables flexible input signal adaptation and configuration

👉 Nvideo = Input Control + Video Capture + Interface Integration

Key Applications

Hardware-Level Input Control

• Direct management of keyboard and mouse signals at the hardware level
• Stable and consistent performance
• Suitable for development, testing, and system integration

Video Capture & Display Output

• Captures GPU output via HDMI input
• Supports real-time display output via HDMI loop-out
• No additional drivers required
• Smooth and stable signal transmission

Streaming & Recording Compatibility

• Works with standard video capture software
• Supports:
  • Video recording
  • Live streaming
  • Screen monitoring

Flexible Input Configuration

• Supports customizable input parameters
• Adjustable response curves and signal behavior
• Suitable for advanced configuration scenarios

Performance Specifications

• HDMI Input:
  Up to 1920×1080 @ 60Hz
• HDMI Output:
  Real-time loop output (no noticeable delay)
• USB 3.0 Capture:
  Up to 1920×1080 @ 60Hz
  Typical delay: 3–5 FPS (depending on system performance)
• Input Interface Performance:
  Up to 1000Hz polling rate
• Network Interface:
  • Real-time input monitoring
  • Data adjustment and control
  • Up to 1000 operations per second

Wiring & Setup Guide

Port Overview

• HDMI IN:
  Connect to graphics card output for signal input
• HDMI OUT:
  Connect to monitor for real-time display output
• Device Port (USB):
  Connect to target system (recognized as standard input device)
• External Input Ports:
  Connect keyboard and mouse devices
• USB 2.0 Port:
  Connect to secondary system for control and data communication
• USB 3.0 Port:
  Connect to PC for video capture

Setup Recommendation

👉 Connect all cables first, then connect the USB 3.0 cable last to power the device
👉 Avoid connecting USB 3.0 before completing other connections

Precautions

• Ensure HDMI input resolution is 1920×1080 @ 60Hz or below
• Higher bandwidth signals are not supported
• If the system detects USB2 Video, it indicates:
  • The current port is not USB 3.0
  • The device will still function, but with reduced performance
• It is recommended to test the device using standard software before advanced use

Testing Method (Example: OBS)

1. Open OBS
2. Create a new Video Capture Device
3. Select the device camera source
4. Verify that image and input functions operate normally

👉 If all functions are working correctly, the device is properly set up

Developer Notes

• Demo tools can be used for testing and integration
• Typical system delay: 80–100ms (stable range)

Product Highlights

✔ 3-in-1 integrated hardware system
✔ Real-time video capture and display output
✔ 1080P 60Hz performance support
✔ Hardware-level input signal control
✔ No driver required
✔ Compatible with mainstream video software