Alfatron ALF-4KU3-CAP 4K HDMI to USB3.0 Video Capture Card

The Alfatron Electronics ALF-4KU3-CAP is built for video engineers, live streaming operators, and AV integrators who need a reliable, no-driver capture interface between professional HDMI sources and recording or streaming software. Supporting HDMI 2.0 input and loop output at up to 4K at 60Hz with 4:4:4 color, it preserves full signal integrity while simultaneously sending capture data to a host computer over USB3.0 at transfer rates up to 300-350MB/s. Capture resolution scales to 4K at 30Hz or 1080p at 120Hz depending on the application requirement.

The device is plug-and-play across Windows 7 through 11, macOS 10.12 and above, and Linux, with no custom driver installation required. UVC and UAC protocol support means it works natively with the most widely deployed production software in live streaming and broadcast environments, including OBS, vMix, Wirecast, XSplit, Zoom, Skype, and Adobe Flash Media Live Encoder. A 3.5mm LINE input and LINE output add analog audio mixing flexibility without requiring a separate interface, making it a compact all-in-one capture solution for single-operator production setups, classroom recording, or remote event capture.

For integrators building permanent or semi-permanent production rooms, the compact form factor and broad OS compatibility reduce deployment friction. HDCP 2.2 support with backward compatibility ensures the card handles protected source content appropriately, while support for YUY2, RGB32, and NV12 capture formats gives post-production teams flexibility in downstream encoding pipelines.