Magewell Pro Capture SDI

Magewell Pro Capture SDI: Professional Single-Channel SDI Capture Card

The Magewell Pro Capture SDI captures a single SDI source and delivers it to your production software as a clean, broadcast-grade video feed. At £215, it is priced identically to the HDMI equivalent, but it serves a fundamentally different market. SDI is the signal standard of professional broadcast, and if your cameras, routers, or production equipment use SDI connections, this is the correct card to buy.

SDI versus HDMI: Why the Signal Type Is the Decision

HDMI is the connection standard on consumer televisions and desktop monitors. SDI is what you find on professional broadcast cameras, vision mixers, distribution amplifiers, production routers, and broadcast infrastructure built to last decades. The reasons broadcast uses SDI rather than HDMI are practical ones. BNC connectors lock in place and do not pull free under cable tension. Coaxial cable carries SDI reliably over runs of 100 metres or more without signal conditioning. SDI carries embedded audio alongside video in a single cable without adapters or separate audio runs. If your source equipment has BNC outputs labelled SDI, HD-SDI, or 3G-SDI, this is the card that connects it to your production PC correctly.

The Pro Capture SDI accepts all three SDI formats: SD-SDI for standard definition sources, HD-SDI for 1080i and 720p signals, and 3G-SDI for 1080p60 and higher-data-rate HD signals. The FPGA detects the input format automatically.

FPGA Processing and CPU Headroom

The onboard FPGA handles scaling, deinterlacing, colour space conversion, and frame-rate conversion in hardware. The host CPU receives a clean, processed stream rather than raw SDI data. This matters in live production environments where the same machine is simultaneously running encoding, graphics rendering, streaming, and monitoring. Offloading signal processing to the card keeps CPU headroom available for those tasks.

The card also includes an analogue header supporting CVBS composite, S-Video, and YPbPr component video with stereo analogue audio, a useful addition for facilities that still have legacy analogue equipment alongside their SDI infrastructure.

Software Compatibility

The Pro Capture SDI works with the major production and editing platforms:

• vMix, where it appears as a standard capture input alongside any other devices
• Wirecast for live streaming and broadcast production
• OBS Studio with the Magewell DirectShow driver on Windows or V4L2 on Linux
• Adobe Premiere Pro for direct SDI capture to timeline
• FFmpeg for server-side and command-line ingest workflows
• Magewell Capture Express for standalone recording without third-party software

Form Factor and Installation

The card uses a low-profile x1 PCIe slot and ships with both full-height and low-profile brackets, fitting 1U rackmount servers, broadcast workstations, and compact desktops. On Windows 10, 11, and Server editions, the Magewell driver package is required. On Linux kernel 3.x and later, the card registers via V4L2 without a separate driver install. macOS 10.14 and later uses the MWCapture SDK. The card is rated for 24/7 continuous operation, which is the operational expectation for broadcast ingest hardware rather than intermittent production use.

Who This Card Is For

The Pro Capture SDI is the right purchase for anyone working in a broadcast or professional video environment where SDI is the standard signal format. Broadcast journalists recording from studio cameras, production companies ingesting from SDI-output professional cameras, live event engineers connecting to house SDI infrastructure, and broadcast engineers building ingest workstations are all typical buyers. If you sometimes work with both SDI and HDMI sources and want a single card that accepts both, the Pro Capture AIO is worth considering. For two simultaneous SDI channels, the Pro Capture Dual SDI at £400 scales the same architecture.

Buying from StreamKit

StreamKit is an authorised UK Magewell reseller. The Pro Capture SDI ships with the full three-year manufacturer warranty, free UK tracked delivery, and access to our UK technical support team for driver setup, software configuration, and compatibility queries. If you are building a broadcast ingest system and want to confirm the right card for your specific SDI source equipment, contact us before ordering.