Capture Cards for Video Surveillance: Enhance Your Security System with High-Quality Video Input

CAPTURE CARDS FOR VIDEO SURVEILLANCE

Capture cards can serve as an alternative to traditional video recorders in video surveillance systems. By using a computer equipped with a capture card, you can efficiently manage and store video footage. Below is a detailed overview of their functionality, classifications, and selection criteria.

HOW CAPTURE CARDS WORK

When used in a video surveillance setup, capture cards perform the following tasks:

1. Signal Reception: The camera sends video signals to the capture card.
2. Signal Processing: The card digitizes the video, compresses it (e.g., using H.264 or MPEG-4), and reduces noise.
3. Audio Integration: If the camera has a microphone and the card has an audio input, sound is digitized and synchronized with the video.
4. Video Output: The processed signal is saved on a hard drive or displayed on a monitor.

This approach is suitable for home surveillance systems, small offices, warehouses, or workshops.

ADVANTAGES OF CAPTURE CARDS

• Cost-Effective: Cheaper than full-fledged recorders.
• Compatibility: Support for analog cameras from various manufacturers.
• Smart Home Integration: Easily integrates with smart home components via a PC.
• Flexibility: Easier to upgrade and expand without replacing existing components.
• Advanced Control: Computer-based systems offer greater functionality than standalone recorders.

CLASSIFICATION OF CAPTURE CARDS

1. By Processing Method

• Software-Based Cards

  • Perform initial signal processing and delegate advanced processing to the computer via software.
  • Pros: Greater flexibility; capabilities depend on the software.
  • Cons: Increased CPU load, potentially reducing system performance.
  • Examples: Hawell HW-104M9, Spotter 1.4 EV, GeoVision GV-600-12.
  • Cost: ~$50–75 USD.

• Hardware-Based Cards

  • Equipped with onboard processors that handle signal processing independently.
  • Pros: High performance; reduced strain on the PC.
  • Cons: Higher cost and limited upgradability for embedded firmware.
  • Examples: GeoVision GV-2004, NetVision DG-4216HF, Atis AT-0404F.
  • Cost: ~$200–350 USD.

2. By Signal Type

• Analog: Process signals from CCTV cameras or HD analog systems (e.g., HDCVI, HDTVI, AHD).

  • Examples: HikVision DS-4216HFVI-E, GeoVision GV-1480-16.

• Digital: Stream processed video directly to the PC for online viewing and analysis.

  • Examples: Линия IP series (1/4/8/16 channels; ~$50–500 USD).

• Hybrid: Support both analog and digital signals.

  • Examples: Линия Effio 8x25 Hybrid IP, PCI-E 8X25 Hybrid IP (~$350 USD).

3. By Connection Type

• Internal: PCI or PCI-Express cards installed inside a PC.
• External: USB-connected cards for portable setups.

HOW TO CHOOSE A CAPTURE CARD

1. Video Resolution:

   • Minimum resolution should be 720x576. Lower resolutions lack the detail needed for identification.

2. Recording Speed:

   • Real-time recording requires 25 fps per channel.
   • Adjust frame rates based on activity levels in the area (e.g., 3–5 fps for static zones, 15–18 fps for moderate activity, 25 fps for high-speed environments).

3. PC Compatibility:

   • Ensure your computer meets or exceeds the card’s minimum requirements.
   • For multitasking (e.g., running other applications), choose a PC with higher specifications.

4. Channel Capacity and Expansion:

   • Entry-level cards: 4–8 channels.
   • Professional cards: 32–128 channels (e.g., Geovision GV-1480).
   • Look for cards that allow system expansion by adding additional devices.

5. Audio Support:

   • Most modern cards support synchronized audio recording.

SOFTWARE FOR CAPTURE CARDS

Capture card software is integral to system functionality. Most cards include proprietary software with features such as:

• Archive Browsing: Advanced search tools, often with analytics (e.g., object tracking).
• Multi-Camera View: Split-screen displays.
• PTZ Control: Remote control of pan, tilt, zoom, and focus.
• Remote Access: Secure remote monitoring with user access control.
• Recording Modes: Schedule-based, motion-triggered, or continuous recording.

Setup Process:

1. Install hardware drivers.
2. Configure server software on the primary PC.
3. Install client applications on remote devices.

Popular software solutions include Trassir DV-H, AViaLLe, Ewclid, Кодос Видео Сеть, Атлант Видео, and others.

MANUFACTURERS

Well-known manufacturers include:

• HikVision, GeoVision, Dahua, Lux, Novus, Balter, Spotter, Hawell, Линия, Atis, Netvision, Vizor, and more.

With a wide range of options, you can configure a video surveillance system with a capture card to meet your specific needs.