Yuzuki Loop Out HDMI Capture Card PRO is an open source loop output HDMI capture card developed by Yuzuki.
He has released the design under CERN Open Hardware License Version 2 – Permissive, that means you can modify and use the design as per your need.
It’s a low cost USB3.2Gen1 HDMI-USB Video Acquisition along with Loop Out.

The board is based on MS2130 and MS9332 + MS8003 chips from MacroSilicon.
MS2130 is a USB 3.2 Gen 1 HD audio/video capturing chip, which has integrated USB 3.2 Gen 1 device controller, data transceiver module, and audio/video processing block.
The MS2130 can transmit the audio and video signals input by HDMI to a PC, smartphone, or tablet for preview or collection through the USB 3.2 Gen 1 interface.
Technical Specification
- Support HDMI 4Kx2K@30Hz and HDMI 2.0, YCbCr420 4Kx2K@60Hz Loop Out
- Support 10/12/16 bit color depth for Loop Out with adaptive input equalization
- Integrated pre-programmed HDCP keys for Loop Out
- Embedded EDID RAM for Loop Out
- USB Type-C USB3.2 Gen 1 interface
- Full height HDMI x 2, Compatible with DVI 1.0 as well.
- Support YUV&JPEG output
- Compatible with UVC 1.0, UAC 1.0
- Support audio, video capture
- Maximum video input 3840×2160@30
- The highest output resolution is 4096×2160@15
- Support 1920×1080@60
- Support Windows 7 above, macOS 10 and later, Linux, Android, etc.
- Standard UVC 1.0, supports OBS Studio, Camera, FFmpeg, etc.
Simple block level diagram of the board

Supported capture Resolutions

More details and source can be found on Yuzuki GitHUB Repo.
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I am currently working as an embedded systems design consultant and helping companies build custom embedded products, develop test automation solution for their PCB.
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