The Pro Capture SDI 4K Plus is a single-channel SDI capture card built around four HD-BNC ports — two rated to 3G-SDI, one to 6G-SDI, and one to 12G-SDI — so the channel can be wired for single-link 12G-SDI, dual-link 6G-SDI, or quad-link 3G-SDI depending on the source. It sits on a low-profile PCIe x4 card and captures uncompressed video from a camera or switcher's SDI output for recording, editing, or streaming, at resolutions up to 4096×2160 (DCI 4K / UHD). The card extracts audio-formation and channel-status data, supports closed captions, and processes 8- and 10-bit video across multiple colour spaces, with frame-rate conversion, cropping, scaling, de-interlacing, and aspect-ratio conversion on board. It's compatible with Windows, macOS, and Linux (DirectShow, DirectKS, V4L2), and ships with a low-profile bracket and four BNC cables.