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Description
Product Overview
The Magewell Pro Capture Dual SDI 4K Plus is a two-channel professional 4K SDI PCIe capture card designed to ingest two independent high-resolution SDI sources. Each capture channel can accept single-link 12G-SDI, dual-link 6G-SDI, or quad-link 3G-SDI configurations, with input and capture resolutions up to 4096×2160. PCIe Gen2 x8, full 10-bit video processing, multiple capture streams, and low-latency operation make it suitable for broadcast, live production, streaming, recording, and post-production.

Dual-Channel 4K SDI Capture
Two independent capture channels allow two professional SDI sources to be ingested through one PCIe card. Input and capture resolutions are supported up to 4096×2160 pixels. This provides a compact solution for multi-camera and dual-source 4K production workstations.
12G 6G and 3G-SDI Multi-Link Support
Each capture channel can use single-link 12G-SDI, dual-link 6G-SDI, or quad-link 3G-SDI. The card automatically detects single-link, dual-link, and quad-link input configurations. This supports a wide range of professional 4K SDI equipment.
Full 10-Bit Video Processing
Two processing pipelines provide approximately 720 Mpixels/s of processing bandwidth each. Hardware functions include cropping, scaling, deinterlacing, aspect-ratio conversion, color conversion, frame-rate conversion, color adjustment, and OSD composition.
PCIe Gen2 x8 High-Bandwidth Capture
The card connects directly to the workstation through PCIe Gen2 x8. Magewell specifies approximately 1600 MB/s DMA bandwidth per channel on PCIe 2.x systems. This supports demanding dual-channel high-resolution capture and processing workflows.
Ultra-Low-Latency SDI Capture
Magewell specifies an ultra-low-latency mode of 64 video lines. Partial-notification functionality is also available through the Magewell Capture SDK. This supports responsive broadcast monitoring, production, and custom processing applications.
Multiple Independent Capture Streams
Unlimited capture streams can be generated for either input channel. Individual streams can use independent resolution, frame rate, cropping, aspect ratio, deinterlacing, color format, color adjustment, and OSD settings. Each SDI source can therefore serve multiple software workflows.

SDI Connectors
8 × HD-BNC
Single-Link Mode
Up to 2 × 12G-SDI Sources
Multi-Link Modes
Dual-Link 6G · Quad-Link 3G
Host Interface
PCIe Gen2 x8
OBS vMix and Wirecast Compatibility
Magewell lists OBS, vMix, Wirecast, XSplit, VidBlaster, VLC, and VirtualDub among supported applications. Other compatible DirectShow, V4L2, and AVCaptureSession software can also access the capture card.
Windows Linux and macOS Support
Windows APIs include DirectShow, DirectKS, Wave API, DirectSound, and WASAPI. Linux support includes V4L2 and ALSA. macOS applications can access video and audio through AVCaptureSession and AudioUnit.
Capture Express and Magewell SDK
Capture Express is included for Magewell capture workflows. The Magewell Capture SDK provides access to device control, capture formats, synchronization, processing, and low-latency functions. Universal drivers and updatable firmware support professional integration.
Broadcast Engineers
Capture two independent professional 4K SDI feeds inside one workstation.
Live Production Teams
Ingest cameras, routers, switchers, and production feeds for software-based workflows.
Streaming Integrators
Bring professional SDI sources into OBS, vMix, Wirecast, and compatible software.
Post-Production Facilities
Ingest two high-resolution SDI sources with hardware video processing.
AV Integrators
Support single-link and multi-link SDI sources in professional installed systems.
Software Developers
Build custom dual-channel capture applications with Magewell APIs and the Capture SDK.
Magewell Support
Magewell provides a two-year manufacturer warranty for the Pro Capture Dual SDI 4K Plus. Coremicro can help confirm SDI link configuration, source resolution, PCIe x8 compatibility, operating-system support, and software requirements before deployment.
| Specification | Detail |
|---|---|
| Product | Pro Capture Dual SDI 4K Plus |
| Part Number | 11270 |
| SKU | 112700000 |
| Capture Channels | 2 channels |
| SDI Interfaces | 8 × HD-BNC |
| Connector Capabilities | 4 connectors support SD/HD/3G-SDI · 2 support SD/HD/3G/6G-SDI · 2 support SD/HD/3G/6G/12G-SDI |
| Single-Link Capture | 12G-SDI |
| Dual-Link Capture | 6G-SDI |
| Quad-Link Capture | 3G-SDI |
| Link Detection | Automatic single-link, dual-link, and quad-link detection |
| Host Interface | PCIe Gen2 x8 |
| Maximum Input Resolution | Up to 4096×2160 pixels |
| Maximum Capture Resolution | Up to 4096×2160 pixels |
| Maximum Capture Frame Rate | Up to 144fps depending on image resolution and PCIe bandwidth |
| SDI Standards | SD · HD · 3Ga · 3Gb · 3Gb-DL · 3Gb-DS · 6G · 12G-SDI |
| 2K / 4K Modes | 2048×1080 · 4096×2160 |
| SDI Color Sampling | RGB 4:4:4 · YCbCr 4:4:4 · YCbCr 4:2:2 |
| SDI Color Depth | 10-bit · 12-bit |
| Embedded Audio | Up to 8 mono channels at 48 kHz |
| SD-SDI Cable Length | Up to approximately 330 m |
| HD-SDI Cable Length | Up to approximately 190 m |
| 3G-SDI Cable Length | Up to approximately 150 m |
| 6G-SDI Cable Length | Up to approximately 75 m |
| 12G-SDI Cable Length | Up to approximately 40 m |
| 4:2:0 8-Bit Capture | NV12 · I420 · YV12 |
| 4:2:2 8-Bit Capture | YUY2 · YUYV · UYVY |
| 4:4:4 8-Bit Capture | V308 · IYU2 · V408 · BGR24 · BGR32 |
| 4:4:4 10-Bit Capture | V410 · Y410 |
| Video Processing | 10-bit processing · Cropping · Scaling · Deinterlacing · Aspect-ratio conversion · Color conversion · Frame-rate conversion · Color adjustment · OSD |
| Processing Pipelines | 2 pipelines at approximately 720 Mpixels/s each |
| Color Formats | RGB · YCbCr 601 · YCbCr 709 · YCbCr 2020 |
| Multiple Capture Streams | Unlimited streams for any one input channel with independent processing settings |
| Ultra-Low Latency | 64 video lines |
| Hardware Timestamp | 100 ns high-resolution hardware clock |
| PCIe 2.x DMA Bandwidth | Approximately 1600 MB/s per channel |
| PCIe 1.x DMA Bandwidth | Approximately 800 MB/s per channel |
| Windows APIs | DirectShow · DirectKS · Wave API · DirectSound · WASAPI |
| Linux APIs | V4L2 · ALSA |
| macOS APIs | AVCaptureSession · AudioUnit |
| Supported Software | OBS · vMix · Wirecast · XSplit · VidBlaster · VLC · VirtualDub · Livestream · Skype · Vahana · Video Stitch |
| Included Software | Capture Express |
| Driver and Firmware | Universal driver · Updatable firmware |
| Multiple Cards per System | Supported with onboard 16-position card-number rotary switch |
| Form Factor | Low-profile PCIe x8 add-on card |
| Dimensions | 127.89 × 102.92 mm without PCI bracket |
| Maximum Power — Quad-Link 3G | Approximately 23.05 W |
| Maximum Power — Dual-Link 6G | Approximately 22.62 W |
| Maximum Power — Single-Link 12G | Approximately 22.52 W |
| Operating Temperature | 0 to 60°C |
| Storage Temperature | −20 to 70°C |
| Relative Humidity | 5% to 90% non-condensing |
| Manufacturer Warranty | 2 years |
| Included Hardware | Pro Capture Dual SDI 4K Plus card · 8 × HD-BNC to BNC cables |
What is the Magewell Pro Capture Dual SDI 4K Plus used for?
The card captures two independent professional SDI video sources inside one PCIe workstation. It is designed for broadcast, live production, streaming, recording, post-production, monitoring, and professional AV systems.
How many SDI sources can the card capture?
The Pro Capture Dual SDI 4K Plus provides two independent capture channels. Each channel can capture a professional SDI source at resolutions up to 4096×2160.
What SDI connection methods are supported?
Each channel can operate with single-link 12G-SDI, dual-link 6G-SDI, or quad-link 3G-SDI sources. The card automatically detects the active single-link, dual-link, or quad-link configuration.
Why does the card have eight HD-BNC connectors?
The eight connectors are used across the two capture channels to support different SDI link configurations. Multi-link formats require multiple connectors for a single video source, so eight connectors do not represent eight independent capture channels.
Is the card compatible with OBS vMix and Wirecast?
Yes. Magewell lists OBS, vMix, Wirecast, XSplit, VidBlaster, VLC, VirtualDub, and other compatible DirectShow, V4L2, and AVCaptureSession applications.
Can each SDI channel generate multiple capture streams?
Yes. Magewell specifies unlimited capture streams for any one input channel. Each stream can use independent resolution, frame rate, cropping, aspect ratio, deinterlacing, color format, color adjustment, and OSD settings.
What warranty does the Pro Capture Dual SDI 4K Plus include?
Magewell provides a two-year manufacturer warranty for the product. Coremicro can help confirm SDI link configuration, PCIe x8 requirements, operating-system support, and software compatibility before deployment.
Build a Dual-Channel 12G-SDI 4K Capture Workstation
Coremicro supports professional Magewell capture workflows for broadcast, live production, streaming, recording, post-production, and AV integration. Contact our team to confirm SDI link configuration, source resolution, PCIe x8 compatibility, software support, and workstation requirements for the Pro Capture Dual SDI 4K Plus.
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Specifications
Magewell Pro Capture Dual SDI 4K Plus 12G-SDI PCIe x8 Capture Card Specifications
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What's included
Included on Magewell Pro Capture Dual SDI 4K Plus 12G-SDI PCIe x8 Capture Card




















