Magewell USB Capture

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USB Capture HDMI Plus
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Mac & Win
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As low as $299.00

The Magewell USB Capture SDI 4K Plus connects to your computer over a USB interface and lets you capture up to a 4K DCI resolution signal (4096 x 2160) with embedded audio via a 6G-SDI input. It also features a 6G-SDI loop-through for local monitoring, and 3.5mm audio input and output for capturing external audio and extracting embedded audio. It's compatible with Windows, Mac, Linux, and Chrome operating systems.


The card offers a variety of processing and other features, including resolution scaling and deinterlacing. It's capable of operating 24 hours a day, 7 days a week while displaying the status of the input via an LED indicator (idle, input signal locked, memory failed, or FPGA configuration).


Key Features

SDI input and loop-through, audio in/out, USB 3.0 computer interface

Capture 6G/2K/3G/HD/SD-SDI signals (up to 4096 x 2160)

Compatible with Windows, Mac, Linux, and Chrome OS

Plug-and-play operation

UVC protocol support

Up/down scaling


Image control

Various output color spaces

Firmware upgradeable

Multiple devices on one host

24/7 continuous operation

Supported APIs



Wave API/DirectSound/WASAPI







Supported Software








Microsoft Media Encoder

Adobe Flash Media Encoder

Any other DirectShow/V4L2/AVCaptureSession based encoding orstreaming software

Input Interfaces



3.5mm audio jack

unbalanced Line In interface

Host Interface

USB 3.0

compatible with USB 2.0

compatible with USB 3.1 Gen 1

Output Interface

3.5mm audio jack

unbalanced Line Out interface




Input features

Support for up to 4096x2160 input resolution

SDI Specific Features

Integrated cable equalizer extending the cable length asfollows:

up to 330m for SD-SDI signals

up to 190m for HD-SDI signals

up to 150m for 3G-SDI signals

up to 75m for 6G-SDI signals

Support for SD/HD/3Ga/3Gb/3Gb-DL/3Gb-DS/6G (SMPTE 2081)standards

Support for 2K (2048x1080) & 4K (4096x2160) mode

Support for RGB 4:4:4, YCbCr 4:4:4, YCbCr 4:2:2 colorsampling

Support for 10/12-bit color depth

Support for extraction of SMPTE 352 payload identifier

Support for up to 2 (mono) audio channels at 48KHz

Support for extraction of audio formation information &channel status data

Limited support of 3Gb-DS: only the first stream can becaptured

Limited support for capture of the first link of dual linkinterfaces:

YCbCr 4:2:2 10-bit 1080p 50/59.94/60: captured as 1080i50/59.94/60

YCbCr 4:4:4 10-bit: captured as 4:2:2

RGB 4:4:4: R/B sub-sampled

Analog Audio Features

Extract the embedded SDI audio and output via 3.5mmunbalanced Line out

Capture analog audio via 3.5 mm unbalanced Line In interface

Video Capture format

Support for capture resolutions up to 4096x2160

Support for capture frame rates up to 120fps (Actual captureframe rate can be limited by the USB bandwidth and internal working frequency.Typical capture frame rates on the Intel USB 3.0 controller are as follows.)

1920x1080 YUY2 (up to 90fps)

3840x2160 NV12 (up to 30fps)

Support for NV12 & l420 4:2:0 8-bit (up to 4096x2160)

Support for YUY2 & UYVY 4:2:2 8-bit (up to 4096x2160)

Support for RGB24 & RGB32 4:4:4 8-bit (up to 2048x2160)

The default capture formats are YUY2 & NV12. Morecapture formats can be set using USB Capture Utility.

Video ProcessingFeatures

Video processing pipelines with 640 Mpixels/s processingbandwidth

Video cropping

Video scaling

Video de-interlacing


Blend top & bottom field

Top field only

Bottom field only

Video aspect ratio conversion

Auto or manual selection of input aspect ratio

Auto or manual selection of capture aspect ratio

Three aspect ratio conversion modes: Ignore (Anamorphic),Cropping or Padding (Letterbox or Pillarbox)

Video color format conversion

Auto or manual selection of input color format &quantization range

Auto or manual selection of capture color format,quantization range & saturation range

Support for RGB, YCbCr 601, YCbCr 709 color formats

Support for Limited or Full quantization range

Support for Limited, Full & Extended gamut saturationrange

Video frame rate conversion

Vertical flip and mirror

Multiple devices onone computer

Support for connecting multiple USB devices to one system

Support for setting the device serial number as the devicename shown in the system using USB Capture Utility


The USB Capture SDK provide functions including signalstatus extraction, capture configuration and real-time audio & videocapture, etc.

Firmware Upgrade

Multiple devices in one system can be upgradedsimultaneously

LED Indicator

Status LEDs indicate the working state of each channel:

Pulsing slowly: idle

On: input signal locked

Off: input signal unlocked

Double blinks: memory failed or FPGA configuration failed

Form Factor

110.7mm (L) x 56.8mm (W) x 17mm (H)


USB3.0 cable

Power Consumption

5V max current: ~0.86A

max power consumption: ~ 4.3W

Working Environment

Operating temperature: 0 to 50 deg C

Storage temperature: 20 to 70 deg C

Relative Humidity: 5% to 90% non-condensing

  • Magewell USB Capture SDI 4K Plus
  • USB 3.0 Cable
  • Limited 3-Year Warranty

Supported OS


Windows 7/8/8.1/10/Server 2008/Server 2008 R2/Server 2012/Server 2016 (x86 & x64)

Linux (support x86, x64 & ARM architecture)

Ubuntu 12.04/14.04/16.04/17.04/17.10/18.04 (x86 & x64)

CentOS 6.5/7 (x86 & x64)

Fedora 25/26/27 (x86 & x64)

Red hat 6.5 and above (x86 & x64)

Other Linux OS with kernel version 2.6.35 and above


OS X 10.9/10.10/10.11

macOS 10.12 and above

Chrome OS

Recommended OS (tested)


Windows 7 Ultimate/8.1 Enterprise/10 Enterprise/Server 2008 R2 DataCenter/Server 2012 R2 DataCenter/Server 2016 R2 DataCenter (x86 & x64)


Ubuntu 12.04/14.04/16.04 (x86 & x64)

Ubuntu 17.04/17.10/18.04 (x64)

CentOS 6.5/7.2 (x86 & x64)

Fedora 25/26 (x64)

Red hat 6.5 (x86 & x64)


OS X 10.9.5/10.10/10.11.2/10.11.3/10.11.4

macOS 10.12/10.13.2/10.13.3/10.14.3/10.15

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