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Dual channel, high definition HDMI capture card

  1. 1.6GB/s total DMA bandwidth
  2. High performance up and down scaling
  3. Colour space conversion to support any output format
  4. PCI Express Gen 2 x 4 low profile
  5. EMS unified Windows® and Linux® driver support



Discreet video capture is now the mainstay of many small form factor appliances being used in markets such as lecture capture, distance learning and medical environments. EMS’s XtremeLC-HD2 provides a dual channel, high definition HDMI capture card for use within such environments.

EMS’s LiveStream: Capture architecture allows captured video to be processed in real time to a processor or graphics card. The XtremeLC-HD2 supports on board colour space conversion and scaling, providing the ability to efficiently transfer the video signal making it suitable for rendering or encoding applications.

The XtremeLC-HD2 natively supports 32, 24, 16 and 22 bit YUV ad RGB formats.

Multi-application capture

The XtremeLC-HD capture card has been designed for use within application models such as:

  • Medical environments
  • Simulation systems
  • Live events
  • PC and gaming console capture
  • Lecture and presentation capture
  • Real time streaming

It is also possible to put more than a single card into a system for multiple capture channels.

Due to the nature of the LiveStream:Capture architecture, the XtremeLC-HD2 is not supported for wall controller applications that depend on EMS’s MultiStream technology.

Video streaming

Built upon the Microsoft AV stream model, XtremeLC-HD inputs can be accessed and enumerated in any DirectShow or Media Foundation supported application. A video for Linux (V4L) driver package is also available to download.

Tested applications includes:

  • Microsoft Media Encoder
  • VLC
  • Telestream WireCast
  • vMix
  • Opencast Matterhorn
  • VidBlaster
  • OBS Project
  • Adobe Flash Media Encoder
  • Dataton Watchout


Specification of the XtremeLC-HD2 Video Capture Card:

Board Format PCIe Gen 1 x 4 plug-in card
Dimensions 103mm x 64mm (l x h)
Connector HDMI
Pixel Rate Channel 1 – 297 Mpixel/s
Channel 2 – 165 Mpixel/s
Maximum Capture Resolution Channel 1 – 3840x2160p @ 30Hz
Channel 2 – 1920x1080p @ 60Hz
Transfer Rate 1.6GB maximum DMA transfer rate
Hardware Colour Space Conversion 30 / 24 / 16 bit RGB (4:4:4)
16 bit YUV (4:2:2)
12 bit YUV, NV12, YV12 (4:2:0)
Audio Support Stereo pair PCM audio via each HDMI channel at 16 bits in depth, sampling options include 44.1/ 48/ 96 kHz
Low Latency LiveStream:Capture
Single frame time plus DMA transfer of final line
Operating Sysytem Support Linux,
Windows® XP, Windows Vista, Windows Server 2003, Windows Server 2008, Windows 7, Windows 8/8.1 and Windows 10
Power Requirements Max current at 1.5A at 3.3V
Max power ≈ 5W
Operating Temperature 0 to 35 deg C/ 32 to 96 deg F
Storage Temperature –20 to 70 deg C (-4 to 158 deg F)
Relative Humidity 5% to 90% non-condensing
Warranty 3 years

We are continuously developing the technology used within our product ranges delivering outstanding innovative solutions, therefore the specification may change from time to time.


XtremeLC Video Capture Cards (4K)    
User GuideVersion: n/aDate: n/aDOWNLOAD
Software/Drivers - WindowsVersion: 1.1.2Date: 21 Dec 2018DOWNLOAD
Linux Version: 1.2.0Date: 21 Dec 2018CONTACT US
The drivers included in this package support 32 and 64 bit versions of the following operating systems:

Windows® 10
Windows® 8.1
Windows® 8
Windows® 7
Windows® Server 2012
Windows® Server 2008 R2