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Small black rectangular USB video capture box with four AHD inputs and a short attached cable

GRACETOP

GRACETOP GTUS-AHD2U4A 4CH 720P 30FPS USB video capturing device

SKU CH-DCP0-9Q9A0

Captures four AHD camera feeds at 720p 30 fps over USB with no driver required

  • VideoAHD 4CH 720P
  • USB Port1
  • Other ConnectorAHD 4CH 720P
  • Record four AHD channels at 720P 30fps directly to disk
  • Driver-free UVC/UAC support works on Windows, macOS and Linux
  • Plug-and-play USB 2.0 connection needs no external power
  • Real-time streaming to Twitch, YouTube, OBS, Potplayer and VLC
  • Captures 1280×720 at 30Hz with 25fps PAL or 30fps NTSC input

Four-channel AHD capture

The GRACETOP GTUS-AHD2U4A captures four analogue high-definition channels at 720p, accepting PAL at 25 fps or NTSC at 30 fps and outputting a maximum of 1280×720 at 30 Hz. It is aimed at installers, educators and medical-imaging users who need to record multiple AHD cameras directly to a computer. No driver installation is required on Windows, macOS or Linux.

Driver-free USB connection

The device draws power from a USB 3.0 port and uses standard UVC and UAC protocols, so it appears as a webcam to OBS, VLC, PotPlayer and similar software. A single supplied cable carries both data and power, avoiding extra adapters. Users must ensure their AHD sources match the 720p 30 fps input limit, otherwise the signal will not be recognised.

Sustained multi-channel recording

Because each of the four channels is compressed to 720p at up to 30 fps, the USB 2.0-based throughput remains constant during long sessions, writing files straight to the host drive without buffering delays. The compact dongle has no active cooling, so extended captures rely on the host system’s airflow; very long recordings should be monitored for thermal throttling on the host side.

Highlights

  • Record four AHD channels at 720P 30fps directly to disk
  • Driver-free UVC/UAC support works on Windows, macOS and Linux
  • Plug-and-play USB 2.0 connection needs no external power
  • Real-time streaming to Twitch, YouTube, OBS, Potplayer and VLC
  • Captures 1280×720 at 30Hz with 25fps PAL or 30fps NTSC input

Specifications

BrandGRACETOP
ModelGTUS-AHD2U4A
Part NumberGTUS-AHD2U4A
VideoAHD 4CH 720P
USB Port1
Other ConnectorAHD 4CH 720P

Questions about this item

How can I confirm the GRACETOP GTUS-AHD2U4A is capturing at 720P 30fps after I plug it in?

Open your recording software and check the preview window; it should show 1280x720 at 30 Hz with no dropped frames.

What comes in the box with the GRACETOP GTUS-AHD2U4A and what must I provide myself?

The box contains the 4CH AHD capture card and a USB cable; you need to supply AHD cameras and a computer with a free USB port.

The specs list USB 2.0 and USB 3.0 — which one does this model actually use?

The device operates on USB 2.0 high-speed technology for 720P 30fps capture.

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