What Is a Capture Card?
A capture card explained — what it does, the difference between USB and PCIe types, how to choose the right one for your use case and which brands are used by professionals.
A capture card is a device that receives a video signal from an external source — an HDMI camera, gaming console, production switcher or SDI broadcast camera — and delivers it to a computer as a video input, making it available in OBS, vMix, Zoom, Adobe Premiere and any other software that accepts a camera or video source.
What Does a Capture Card Do?
Computers do not have video inputs — they have USB ports, PCIe slots and network ports, but no way to receive an HDMI or SDI signal directly. A capture card bridges this gap: it receives the HDMI or SDI signal from your camera or device and makes it appear inside your computer as a video source.
Once connected, the captured video is available in any compatible software. In OBS Studio, it appears as a Video Capture Device. In Zoom or Teams, it appears as a webcam. In Adobe Premiere Pro, it can be captured directly to the editing timeline. In vMix, it appears as a camera input for live production switching.
⚠️ HDCP protection: Capture cards cannot record signals protected by HDCP (High-bandwidth Digital Content Protection). This affects Blu-ray players, streaming sticks (Fire TV, Roku, Apple TV), Sky boxes and most streaming services. Cameras, computers, production switchers and gaming consoles (in game mode) do not use HDCP and capture correctly.
Types of Capture Card
USB Capture Devices
Connect externally via USB 3.0. Works with laptops and desktops. Most are UVC — plug-and-play with no driver.
- ✅ Portable — works on any computer
- ✅ No driver installation (UVC)
- ✅ Works on Mac, Windows, Linux
- ✅ Affordable entry price
- ⚠️ Must use USB 3.0 (not 2.0)
- ⚠️ Avoid USB hubs — connect direct
PCIe Capture Cards
Install inside a desktop PC motherboard. Lower latency, more stable for 24/7 broadcast ingest servers.
- ✅ Lower latency than USB
- ✅ Stable 24/7 operation
- ✅ Driverless on Linux (V4L2)
- ✅ Multi-channel options
- ⚠️ Desktop PC only — not laptops
- ⚠️ Requires a free PCIe slot
M.2 Capture Cards
Use the M.2 PCIe slot found in most modern laptops and compact PCs. Brings capture capability to systems without a full PCIe slot.
- ✅ Works in laptops with M.2 slot
- ✅ Small form factor PCs
- ✅ Same quality as PCIe
- ✅ Magewell Eco Capture range
- ⚠️ Requires M.2 PCIe slot (check spec)
- ⚠️ Not all M.2 slots are compatible
How to Choose the Right Capture Card
| Your situation | What you need | Recommended |
|---|---|---|
| Content creator / YouTuber with DSLR or mirrorless | USB HDMI capture card | Magewell USB Capture HDMI Gen 2, Elgato Cam Link 4K |
| Gaming capture from PS5, Xbox, Switch | USB or PCIe HDMI capture | Elgato 4K60 Pro, Magewell USB Capture HDMI Plus |
| Professional camera as Zoom / Teams webcam | USB HDMI capture (UVC) | Magewell USB Capture HDMI Gen 2, Inogeni HDMI2USB3 |
| Broadcast SDI camera into PC | USB or PCIe SDI capture | Magewell USB Capture SDI Gen 2, Pro Capture SDI |
| 4K camera capture | USB or PCIe 4K capture card | Magewell USB Capture HDMI 4K Plus / Pro |
| Dedicated ingest workstation (desktop) | PCIe capture card | Magewell Pro Capture HDMI / SDI range |
| Two cameras simultaneously | Dual USB cards or dual-channel PCIe | Magewell USB Fusion, Pro Capture Dual HDMI |
| Laptop with M.2 slot | M.2 PCIe capture card | Magewell Eco Capture range |
| Legacy analogue / CCTV cameras | Analogue capture card | Magewell USB Capture AIO, Pro Capture Hexa CVBS |
Who Uses Capture Cards
Content Creators
Use DSLR or mirrorless cameras instead of webcams for professional-quality YouTube, Twitch and social media content.
Gamers & Streamers
Capture gameplay from consoles to stream on Twitch, YouTube and Kick, or record gaming content for editing.
Corporate
Use PTZ cameras for high-quality video conferencing, record board meetings and archive training sessions from room cameras.
Education
Lecture capture, distance learning delivery and student production. Document cameras via capture card for online teaching.
Houses of Worship
Capture broadcast cameras for weekly live streaming services and build an online video archive for the congregation.
Medical
Capture surgical cameras and imaging equipment for documentation, remote consultation and clinical training content.
Broadcast
Ingest cameras and sources to editing workstations and post-production systems. PCIe cards for 24/7 broadcast ingest servers.
Influencers
High-quality camera as webcam for podcast recordings, brand collaborations and professional-looking social video content.
Capture Card Brands at nuuo.co.uk
USB capture devices — HD
USB Capture HDMI Gen 2
Professional driverless USB capture. UVC on Windows, Mac, Linux. The broadcast-grade standard for HD HDMI capture. From £231 ex-VAT.
Cam Link 4K
Ultra-compact HDMI capture for cameras. Plug and play for Canon, Sony, Nikon. Popular with content creators.
HDMI to USB Converters
Professional HDMI and SDI to USB capture. Broadcast-grade, compact form factor for integration projects.
USB capture devices — 4K
USB Capture HDMI 4K Plus
4K HDMI 2.0 capture with loop-through via USB 3.0. For 4K cameras and mirrorless. From £385 ex-VAT.
USB Capture HDMI 4K Pro
Professional 4K HDMI capture with enhanced colour processing for broadcast and post-production. From £415 ex-VAT.
PCIe capture cards — broadcast workstations
Pro Capture HDMI
Single-channel HDMI PCIe. Driverless on Linux. For dedicated broadcast ingest workstations. From £215 ex-VAT.
UltraStudio range
Blackmagic Thunderbolt and PCIe capture. Popular with DaVinci Resolve users and broadcast production houses.
Not sure which capture card is right for you?
Our technical team can recommend the right capture card for your camera, computer and software in minutes — no obligation.
Get a RecommendationFrequently Asked Questions
What does a capture card do?
A capture card receives an HDMI or SDI video signal from a camera, console or any HDMI/SDI device and makes it available to a computer as a video input. Without a capture card, your computer cannot receive external video signals. With one, the video appears in OBS, vMix, Zoom, Adobe Premiere or any software accepting a camera or video source.
Do I need a capture card for streaming?
You need one if your video source has an HDMI or SDI output — a camera, console, PTZ camera or production switcher. If you are streaming only with a USB webcam, no capture card is needed. If you want to use a professional camera, a gaming console or any HDMI device, a capture card brings that signal into your computer.
What is the difference between USB and PCIe capture cards?
USB cards connect externally — portable, work with laptops and desktops, plug and play. PCIe cards install inside a desktop PC — lower latency, more stable for broadcast ingest, not for laptops. USB for content creation and location work; PCIe for dedicated production workstations and broadcast ingest servers.
Can I use a capture card as a webcam for Zoom or Teams?
Yes. USB capture devices using the UVC standard appear as webcams to any video conferencing app. Select the card as the camera in Zoom, Teams, Meet or Webex settings. This lets you use a DSLR, mirrorless or PTZ camera instead of a built-in webcam for significantly better video quality in meetings.
What capture card do I need for 4K?
USB 4K: Magewell USB Capture HDMI 4K Plus (£385) or 4K Pro (£415). PCIe 4K: Magewell Pro Capture HDMI 4K (£432) or Pro Capture HDMI 4K Plus (£595). All 4K capture requires USB 3.0 for USB cards, or a PCIe slot for PCIe cards. Check your camera outputs true 4K and not a downscaled 1080p signal.
Why is my capture card showing a black screen?
The most common causes: (1) HDCP protection — Blu-ray players and streaming sticks cannot be captured; (2) wrong USB port — must be USB 3.0 (blue), not USB 2.0; (3) resolution mismatch in OBS — set to match your camera output; (4) wrong device selected in software. Check each in order. See our full HDMI capture guide for detailed troubleshooting.
What is UVC and why does it matter?
UVC (USB Video Class) is a USB standard that makes capture cards work as plug-and-play cameras on Windows, macOS and Linux — no driver installation required. UVC cards are recognised immediately by every application. Magewell USB Capture cards and Elgato Cam Link are UVC compliant. Non-UVC cards require proprietary drivers and are less compatible across platforms and applications.