
In Stock


Single-channel 12G-SDI 4K60 capture with loop-through — broadcast-grade.
Ask us a quick question about this product — signal compatibility, use case fit, or anything technical. We usually reply the same day.
The Pro Capture SDI 4K Plus captures 4K60 over 12G-SDI single-link — the format that current professional broadcast cameras output natively. With active loop-through, low-profile form factor, and broadcast-grade FPGA processing, it is the SDI counterpart to the HDMI 4K Plus LT.
In broadcast and OB-truck workflows this card is becoming the standard 4K ingest specification. The single-link 12G-SDI input is simpler to cable than older quad-link 3G-SDI 4K (one cable instead of four), and the active loop-through means the captured signal continues feeding downstream broadcast equipment without interruption.
Backward compatibility with 6G, 3G, HD and SD-SDI is built in — the card adapts to whatever signal a camera delivers without configuration. Useful in mixed-vintage facilities where the same chassis may capture from a 4K cinema camera one day and an HD studio camera the next.
| SKU | 111800000 |
| Brand | Magewell |
| Category | Pro Capture |
| Form Factor | Low-profile PCIe x4 — 167.65mm × 68.88mm |
| Host Interface | PCIe Gen2 x4 |
| Video Input | 1× BNC (SD/HD/3G/6G/12G-SDI) |
| Loop-through | None |
| Max Input Resolution | 4096×2160 (4K 60fps via 12G-SDI) |
| Signal Features | Cable equalizer: SD up to 300m, HD 200m, 3G 150m, 6G 100m, 12G 80m — SD/HD/3G/6G/12G-SDI — 4K/2K/1080 — RGB/YCbCr 4:4:4/4:2:2 — 10/12-bit — Up to 8-ch audio at 48kHz — SMPTE 352 — HDR10/HLG |
| Video Capture Formats | 4:2:0 8-bit: NV12, I420, YV12 — 4:2:2 8-bit: YUY2, YUYV, UYVY — 4:4:4 8-bit: V308, IYU2, V408, BGR24, BGR32 — 4:4:4 10-bit: V410, Y410 — Up to 144fps (resolution & bandwidth dependent) |
| Video Processing | Full 10-bit pipeline (~720 Mpixels/s ×2) — Scaling, Cropping, De-interlace — Aspect ratio conversion — Colour space (RGB, YCbCr 601/709/2020) — Frame rate conversion — OSD |
| Audio | Up to 8-ch embedded SDI audio at 48kHz |
| Multi-Stream | Unlimited simultaneous capture streams per channel — independent crop/colour/resolution/frame rate per stream |
| Latency | Ultra low — 64 video lines |
| DMA Bandwidth | ~400 MB/s (PCIe 2.0) — ~200 MB/s (PCIe 1.0) — Intel tiled GPU, AMD DirectGMA, Nvidia GPUDirect |
| Sync & Timestamp | Hardware 100ns clock — A/V synchronisation — Multi-card sync via SDK |
| Recommended OS | Windows 10/11/Server 2016/2019/2022/2025 (x86 & x64) — Linux x86/x64/ARM kernel 2.6.35+ — macOS 10.9+ / 10.12+ |
| Supported APIs | Windows: DirectShow, DirectKS, WASAPI/Wave/DirectSound — Linux: V4L2, ALSA — macOS: AVCaptureSession, AudioUnit — Magewell Capture SDK |
| Compatible Software | VLC, VirtualDub, OBS, XSplit, vMix, Wirecast, Adobe Flash Media Encoder, Microsoft Media Encoder, any DirectShow/V4L2/AVCaptureSession software |
| Multi-Card / SDK | Magewell Capture SDK — rotary switch 0–F for multi-card systems — safe firmware upgrade without shutdown |
| LED Indicator | Pulsing slowly: no signal — On: signal locked — Double blink: memory/FPGA error — Off: firmware/power fault |
| Power | Max 15W |
| Working Environment | Operating: 0°C to 60°C — Storage: −20°C to 70°C — Humidity: 5–90% non-condensing |
| UK Stock | In Stock |
| Warranty | 2–3 Years (Magewell manufacturer warranty) |
Full specifications: magewell.com/tech-specs/pro-capture-sdi-4k-plus ↗
Everything included in the box with the Pro Capture SDI 4K Plus. Part numbers and accessory images from official Magewell documentation.



If anything is missing from your delivery, contact us within 7 days and we will arrange a replacement.
Official Magewell documentation for the Pro Capture SDI 4K Plus. Datasheet is mirrored on our server for direct download; drivers, firmware and software live on Magewell's download centre and open in a new tab.
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The Pro Capture SDI 4K Plus uses a Low-profile PCIe x4 slot. It will also fit in larger PCIe slots (x8, x16) as PCIe is backward compatible, but will run at the card's native lane width.
The Pro Capture SDI 4K Plus is a capture card. Simultaneous playback (loop-through) depends on the specific model — check the Loop-Through spec in the full specification table. ForeFront Imaging can advise if you need simultaneous I/O.
The Pro Capture SDI 4K Plus works with any software that supports DirectShow (Windows), V4L2 (Linux), or AVCaptureSession (macOS), including OBS Studio, vMix, Wirecast, Capture One, XSplit and most broadcast NLE software. Magewell's free Capture Express software is also available.
The Pro Capture SDI 4K Plus accepts 12G-SDI with loop-through.
The Pro Capture SDI 4K Plus captures at up to 3840x2160 @ 60fps.
Yes. Magewell Pro Capture cards are fully supported on Windows 10 and Windows 11. Driver downloads are available free from Magewell's website and from our Software page.