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Version: 2.0 (Legacy)

Using an IP or USB Camera as Second Camera

Configure secondary cameras for dual-camera OpenHD setups.

Overview​

Secondary camera setups enable:

  • Picture-in-Picture: Display both cameras simultaneously
  • Camera Switching: Switch between cameras during flight
  • Different Views: Wide angle and zoom cameras
  • Specialized Imaging: Thermal and visible light combination

Dual Camera Benefits​

Multiple Perspectives​

  • Forward and Down: Navigation and inspection views
  • Wide and Telephoto: Different field of view options
  • Visible and Thermal: Combined thermal/visible imaging
  • Pilot and Passenger: Multiple viewing angles

Operational Flexibility​

  • In-flight Switching: Change cameras without landing
  • Recording Options: Record from multiple cameras
  • Redundancy: Backup camera if primary fails
  • Specialized Tasks: Different cameras for different missions

Configuration​

Primary Camera Setup​

  1. Configure main camera (typically CSI)
  2. Set primary video parameters
  3. Test primary camera functionality
  4. Optimize settings for primary use

Secondary Camera Configuration​

  1. Connect USB or IP camera as secondary
  2. Configure secondary camera parameters
  3. Set switching controls
  4. Test dual camera operation

Hardware Considerations​

Power Requirements​

  • Additional Power: Secondary camera increases power draw
  • Power Distribution: Ensure adequate power for both cameras
  • Power Management: Monitor total power consumption
  • Battery Planning: Account for reduced flight time

Processing Load​

  • CPU Usage: Dual cameras increase processing requirements
  • Bandwidth: Monitor total video bandwidth
  • Memory Usage: Additional camera streams use more RAM
  • Heat Generation: Increased processing generates more heat

Camera Switching​

Manual Switching​

  • OSD Controls: Switch cameras via on-screen display
  • RC Channel: Assign camera switching to RC channel
  • Ground Control: Switch cameras from ground station
  • Physical Switch: Hardware switch for camera selection

Automatic Switching​

  • Flight Mode: Switch based on flight mode
  • Altitude: Change cameras based on altitude
  • GPS Position: Location-based camera switching
  • Timer: Automatic switching at intervals

Display Options​

Picture-in-Picture (PiP)​

  • Main + Inset: Large main view with small secondary
  • Side-by-Side: Equal size displays
  • Overlay: Secondary camera as overlay
  • Custom Layout: User-defined display arrangement

Full Screen Switching​

  • Seamless Transition: Quick switching between cameras
  • Fade Effect: Smooth transitions
  • No Interruption: Maintain video stream during switch
  • Status Indication: Show active camera

Use Cases​

Search and Rescue​

  • Thermal + Visible: Combine thermal and visible cameras
  • Wide + Zoom: Overview and detail cameras
  • Down + Forward: Navigation and search cameras
  • Recording: Record both streams for analysis

Inspection Tasks​

  • Detail + Overview: Close-up and wide shots
  • Different Angles: Multiple viewing perspectives
  • Documentation: Comprehensive visual documentation
  • Comparison: Before/after comparisons

Cinematic Applications​

  • Multiple Angles: Different camera angles for editing
  • Backup Recording: Redundant recording capability
  • Creative Shots: Artistic camera combinations
  • Live Switching: Real-time camera direction

Technical Limitations​

Bandwidth Constraints​

  • Total Bandwidth: Limited by radio link capacity
  • Quality Trade-offs: May need reduced quality for dual streams
  • Compression: Increased compression may be necessary
  • Prioritization: Primary camera may get priority

Processing Limitations​

  • CPU Capacity: Dual cameras stress processing capability
  • Frame Rate: May need reduced frame rates
  • Resolution: Possible resolution limitations
  • Latency: Additional processing may increase latency

Configuration Examples​

Thermal + Visible Setup​

Primary Camera: CSI (Visible Light)
- Resolution: 1920x1080
- Frame Rate: 30fps
- Bitrate: 8000 kbps

Secondary Camera: USB Thermal
- Resolution: 640x480  
- Frame Rate: 15fps
- Bitrate: 2000 kbps

Wide + Zoom Configuration​

Primary Camera: CSI Wide Angle
- Resolution: 1280x720
- Frame Rate: 60fps
- Bitrate: 6000 kbps

Secondary Camera: IP Zoom Camera
- Resolution: 1920x1080
- Frame Rate: 30fps
- Bitrate: 4000 kbps

Troubleshooting​

Performance Issues​

  • Slow Switching: Reduce camera resolution/bitrate
  • High Latency: Optimize processing settings
  • Dropped Frames: Check total bandwidth usage
  • System Overload: Monitor CPU and memory usage

Configuration Problems​

  • Camera Not Detected: Verify connections and compatibility
  • Poor Image Quality: Adjust compression settings
  • Switching Failures: Check control channel configuration
  • Sync Issues: Verify timestamp synchronization

:::warning Resource Usage Dual cameras significantly increase system resource usage. Monitor performance carefully and adjust settings as needed. :::

:::info Testing Required Always test dual camera configurations thoroughly before important flights. Performance may vary with different camera combinations. :::

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