Skip to main content

Application Window Capture

Overview​

Application Window Capture allows ITVDesk to capture and stream a single application window instead of the entire desktop.

Only the selected application window is captured and exposed as a video stream, while the rest of the desktop remains hidden.

This mode is ideal when you want to monitor or record specific software without exposing the full screen.

Typical use cases include:

  • POS applications
  • Banking or financial software
  • ERP / CRM systems
  • Industrial control panels
  • Training and presentation software
  • Any application containing sensitive data

Selecting Application Window Capture​

To capture a specific application window:

  1. Create a new Virtual ONVIF IP Camera
  2. In Camera Media Source, select Application Windows
  3. Choose the application window from the list
  4. Confirm the selection

Only the selected window will be captured and streamed.

Application window selection

How Application Window Capture Works​

  • ITVDesk captures only the client area of the selected application window
  • Capture is independent of desktop resolution and layout
  • Other applications, notifications, taskbars, or background windows are never included
  • If the application window is moved, resized, or partially occluded, the stream updates automatically

This ensures:

  • Improved privacy and data isolation
  • Clean and predictable video output
  • Reduced capture overhead and unnecessary data exposure
Application window selection Captured application window output

Window Visibility and Behavior​

Application Window Capture behaves as follows:

  • If the application window is visible, it is streamed normally
  • If the window is minimized, the stream may pause or freeze (depending on OS)
  • If the window is closed, the stream stops
  • If the application is restarted, it must be reselected if the window handle changes
tip

For continuous operation, ensure the application window remains open and visible.

Multi-Channel and Multi-Camera Support​

Application windows can be used in both ITVDesk operating modes:

Multi-Channel Mode​

  • Each captured application window becomes one ONVIF video channel
  • All windows belong to a single ONVIF IP camera
  • Suitable for VMS/NVR systems that support multi-channel devices

Multiple Camera Mode​

  • Each application window becomes a separate virtual ONVIF IP camera
  • Each camera has one video channel
  • Each camera uses the same IP address but a different port

This provides full compatibility with both modern and legacy VMS systems.

Performance Considerations​

Application Window Capture is optimized for CPU-based multi-threaded processing.

  • Each window is processed independently
  • Encoding runs in parallel on multiple CPU cores
  • CPU usage depends on:
    • Window resolution
    • Frame rate
    • Selected codec
    • Number of active application windows

GPU Usage​

For application window capture:

  • Encoding is performed on the CPU for stability and low latency
  • GPU acceleration is not required and typically provides no benefit

GPU acceleration may be used for:

  • Media file decoding
  • External video sources

Advantages Over Desktop Capture​

Application Window Capture offers several advantages:

  • No exposure of unrelated desktop content
  • Higher privacy and security
  • Cleaner video streams
  • Reduced bandwidth usage
  • Easier compliance in regulated environments

This makes it especially suitable for POS, banking, and enterprise systems.

Summary​

Application Window Capture allows ITVDesk to:

  • Capture only a selected application
  • Stream it via ONVIF and RTSP
  • Expose it as multi-channel or multi-camera output
  • Maintain privacy and security

It is the preferred capture method when monitoring specific software applications instead of full desktops.

Next Steps​

👉 Webcam Capture
👉 Combined Media Stream
👉 External RTSP / ONVIF Camera

Last updated on