How to choose a DVI capture card

Users need to capture video from devices for multiple different reasons. The types of video are limitless. From security (e.g. CCTV, IP network) to medicine (e.g. ultrasound and X-Ray imagery), education, engineering, simulation and control rooms.

As long as a device has a DVI or VGA output port (or an output adapter to DVI or VGA), the output signal can be captured by a DVI or VGA capture card or video grabber. Once the signal, or stream, is captured you can save the data to a computer to archive it, print the captured images, stream the data to the Internet or upload it on an FTP server to make it accessible for remote users.

Many different types of capture cards and video grabbers exist. For the widest possible range of uses from a single device, Epiphan recommends selecting capture devices with DVI inputs that can accept DVI, HDMI™ and VGA signals.

DVI port

DVI-based capture solutions are available in internal (PCIe) and external (USB 3.0, USB 2, Ethernet, or Thunderbolt) form factors. When determining which capture device to purchase, the first question to answer is whether or not you’ll want an internal or external device. From there, explore the versatility of the devices, capture quality, and capture speed (fps).

Internal DVI Capture Cards

Depending on your requirements the internal cards may suit your needs well. For instance, if you always use the same work-station and usually work in the same environment, Epiphan’s DVI2PCIe or DVI2PCIe Duo cards are a fantastic choice. With lossless capture at up to 80 fps, these capture cards are installed inside your Windows, Linux or Mac computer. You can immediately begin to capture dual-link DVI (single-lik for DVI2PCIe), VGA, BNC/component or unencrypted HDMI video signals. You can capture full HD at a capture rate of 60 frames per second for 1080p video. These cards are compatible with all popular OSes and fit into a x1, x4, x8 or x16 PCIe 1.x slot


Capture card diagram

Click for more information on DVI2PCIe or DVI2PCIe Duo.

External USB – Video Grabber – High Resolution and Portability

Sometimes, portability is what you need. This may be due to size constraints of the capturing computer (i.e. a laptop can’t fit a PCIe capture care) or may be because multiple capture computers share a single capture device, or for other reasons. If you work with high precision video sources and need to get very high quality image capture from a portable device, look at the external video grabbers provided by Epiphan Systems. We have solutions that support resolutions up to 2048×2048 and frame rates up to 60 fps.


Capture card diagram

Click for more information on DVI2USB 3.0.

The most versatile and portable grabber for video capture is DVI2USB 3.0. DVI2USB 3.0 is used to capture video from VGA and single-link DVI and video with audio HDMI over USB 3.0. It is also backwards compatible with USB 2.

For dual-link DVI, DVI2USB Duo captures images and video with resolutions up to 2048×2048 (or 2560 x 1600, widescreen).

Both these video grabbers are compatible with Windows, Mac OS X and Linux.

Choosing the Appropriate DVI Frame Grabber Capture Device

Before making your choice, explore different solutions and take into account the characteristics that best match your application needs. What speaks well for the external and internal DVI frame grabbers from Epiphan? Their high performance capture resolution support, quality software drivers and support for multiple operating systems. They are ideally suited for all high-precision applications.

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