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Four independent 12G-SDI channels with 4K processing on a PCIe x8 card.
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 Quad SDI 4K is the top of the Pro Capture range — four fully independent 12G-SDI capture channels with 4K-capable processing on a full-height PCIe x8 card. For SDI density per slot at 4K, nothing else gets close.
This card is specified into the largest broadcast and live-production workflows: studios running four 4K SDI cameras, OB trucks handling premium 4K productions, and broadcast galleries doing simultaneous 4K compliance recording on four programme outputs. Each of the four channels has its own FPGA and runs completely independently.
Backward compatibility with 6G, 3G, HD and SD-SDI is built in per channel, so mixed-format input is supported without configuration. Common in facilities migrating from 3G to 12G workflows over time, where the same card needs to handle both vintages of camera.
| SKU | 112400000 |
| Brand | Magewell |
| Category | Pro Capture |
| Form Factor | Full-height PCIe x8 — 210mm × 111mm |
| Host Interface | PCIe Gen2 x8 |
| Video Input | 4× BNC (SD/HD/3G/6G/12G-SDI) |
| Loop-through | None |
| Max Input Resolution | 4096×2160 4K 60fps per channel (12G-SDI) |
| Signal Features | Cable equalizer per port — SD/HD/3G/6G/12G-SDI — HDR10/HLG — RGB/YCbCr 4:4:4/4:2:2 — 10/12-bit — Up to 8-ch audio per input at 48kHz |
| 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 per channel |
| Audio | Up to 8-ch embedded SDI audio per input 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 30W |
| 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-quad-sdi-4k ↗
Everything included in the box with the Pro Capture Quad SDI 4K. 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 Quad SDI 4K. 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 Quad SDI 4K uses a Full-height PCIe x8 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 Quad SDI 4K 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 Quad SDI 4K 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 Quad SDI 4K accepts 4x 12G-SDI.
The Pro Capture Quad SDI 4K captures at up to 3840x2160 capable across channels.
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.