AVMATRIX UC1218-4KS HDMI TO USB3.0 4K30 Capture Box
1. Introduction
The UC1218-4KS is a broadcast-grade, professional, and convenient device designed to capture uncompressed 4K HDMI signals via USB 3.0 for audio and video acquisition, live streaming, and recording on a computer. It supports video capture resolutions up to 4K30 and is compatible with various systems, including Windows and Linux, adhering to UVC and UAC standards. Utilizing an uncompressed RGB 24-bit color format, it accurately reproduces the original colors of the image. The device features a plug-and-play, driver-free, and power-free design, making it an ideal choice for applications in live streaming, gaming, and professional audio and video work.
2. Main Features
- Inputs: 4K HDMI input, Mic/Line audio input
- Outputs: 4K HDMI loop-out, USB 3.0 output, audio output
- Uncompressed 4K30 video and audio capture
- Supported capture video formats: RGB24, P010, YUY2, NV12, I420, MJPG
- Plug-and-play, driver-free, power-free
- Compatible with: Windows, Linux, macOS
- Compatible with software: OBS, ZOOM, Teams, Twitch, Vmix, etc.
3. Specifications
| Connections | |
|---|---|
| Video Interface | 1 x HDMI 2.0 In 1 x HDMI 2.0 Loopout 1 x Type C (USB 3.0, Up to 5Gbps) |
| Audio Interface | 1 x 3.5 mm stereo audio (Line in) 1 x 3.5 mm audio (Mic in) 1 x 3.5 mm stereo audio out |
| Format | |
| HDMI 2.0 input & Loopout | Up to 4K60Hz, 2K144Hz, 1080p240Hz |
| Audio & Video Capture | UVC (USB video class) standard UAC (USB audio class) standard |
| Audio Codec | 2-channel, 16 bit PCM, 48kHz, 1536kbps |
| Video Format | RGB24: Up to 2560 x 1440 p30 P010: Up to 3840 x 2160 p60 YUY2: Up to 2560 x 1440 p60 NV12: Up to 3840 x 2160 p30 I420: Up to 3840 x 2160 p30 MJPG: Up to 3840 x 2160 p60 |
| OS and Software Compatibility | |
| Supports OS | Windows 7/8/10/11, Linux (Kernel version 2.6.38 and above), macOS (10.8 and above) |
| Software Compatibility | OBS studio, ZOOM, Teams, Google Meet, Youtube Live, QuickTime Player, Face time, etc. |
| Compatible SDK | DirectShow (Windows), DirectSound (Windows) |
| Others | |
| Dimensions | 104 x 75.5 x 19 mm |
| Weight | Net: 271g Gross: 403g |
| Power Consumption | 4.5 W ± 10% |
| Operating Temperature | -20 ~ 60°C |
| Storage Temperature | -30 ~ 70°C |
| Relative Humidity | 20 ~ 90 % RH (non-condensing) |
| Accessories | 1x USB 3.0 A to C cable, 0.8m HDMI cable (Optional) |
| Warranty | 3 Years |
4. Interfaces
The device features the following interfaces:
- HDMI 2.0 LOOP OUT
- HDMI 2.0 IN
- USB-C OUT
- AUDIO OUT
- MIC IN
- LINE IN
5. Operating Instructions
The UC1218-4KS HDMI 2.0 to USB 3.1 video capture device is based on the UVC (USB Video Class) and UAC (USB Audio Class) standards. No additional drivers are required. After installation in the operating system, the relevant video and audio devices will be added. For example, in the Windows Device Manager, new devices will appear:
- Under Imaging Devices: USB 3.0 Capture Video
- Under Audio Inputs and Outputs: Mixer (USB 3.0 Capture Audio) / Headphones (2-USB 3.0 Capture Audio)
6. Output
- USB Capture Output: Use third-party software such as OBS, Vmix, Zoom, Teams, Potplayer, etc., to capture the HDMI input video for live streaming activities like gaming, broadcasting, Vlog, remote education, and conferences. The captured video resolution can reach up to 4K30.
- HDMI 2.0 Loop-out: Loop out the video and audio from the HDMI 2.0 input.
7. Audio
Audio Mixing:
The UC1218-4KS capture card features external MIC and Line audio inputs, offering more flexible audio configuration.
- USB Audio: Includes HDMI 2.0 audio, MIC audio, and Line audio.
- Audio Output: Includes HDMI 2.0 audio, MIC audio, Line audio, and PC audio.
- HDMI 2.0 Loop-out: HDMI 2.0 audio
Audio Output:
The audio output is sourced from the embedded audio of HDMI 2.0, the audio input from Line In, and the computer's audio. To enable the computer's audio capture, connect the device via USB, go to the computer's sound settings, select the sound output, click the speaker icon, and choose "Headphones (2-USB3.0 Capture Audio)". With this setup, the USB output can capture the audio being played locally on the computer.
8. Work with OBS & Potplayer
OBS Studio Software Settings:
Step 1. Open OBS Studio, click "+" and select "Video Capture Device". Rename the signal source and click OK.
Step 2. Right-click "Video Capture Device" and select properties. Enter the properties interface, and select the signal source as your device. Users can set other parameter settings in the properties pages and then click OK.
Step 3. Click on the audio setting icon to set up audio. Then enter the properties and select the device.
Step 4. Enter "Advanced Audio Properties" to change settings regarding volume, balance, audio monitoring, and Tracks.
Step 5. Set the output resolution. (HDMI output resolution will change according to USB output).
