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Summary of virtual Video Capture Device

One can work with a virtual Video Capture Device in INTELLECT™ software package. This way assumes that INTELLECT™ operates in a test mode and consists of imitation of video stream feed to virtual Video Capture Device by playing back ready-made video recording. There are two types of virtual video capture devices in Intellect: 

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Enable Desktop Experience Feature when using the virtial video capture device on Server OS and avi files.

Creating and configuring a virtual Video Capture Device

Create and configure a virtual Video Capture Device as follows:

  1. Set the Use virtual grabber checkbox (The Settings panel of the Video subsystem section), having shut down INTELLECT™ beforehand.
  2. Set the Virtual or Virtual bench type of the video capture device depending on the type of the file that will be used for imitation of video stream feed.

  3. Specify the storage for video recording that is to be used for video signal imitation in the Basic settings tab of the selected Camera object.        
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    If Intellect does not detect files for playback within 1 minute after clicking the Apply button, the file search is interrupted.

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The selected folder must not contain video recordings of internal INTELLECT™ format and AVI-files at the same time.


Features of playing files in a virtual Video Capture Device

As a result of the above settings, video recording file from the selected folder will be played back in a loop. 

If you set path to a separate file not a folder for a Virtual type, the file is played once without looping.

You can disable looping of a separate file in Virtual bench type device in one of the following ways:

  1. Enter "OPTIONS:playFileOnce=true" in IP address field on the Video Capture Device settings panel:
    1. the OPTIONS: enables the use of advanced options.
    2. the playFileOnce flag corresponds to the "Single Play" option (the parameter name must be specified strictly case-sensitive).
    3. after the '=' symbol, the value to be applied is indicated (the correct values are 'true', 'TRUE', or '1' for the value "On" / 'false', 'FALSE' or '0' for the value "Off").
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  2. Set the ​playFileOnce = 1 registry key (see Registry keys reference guide).

If there are several files in the folder they are to be played back in the order set in the latest modification.

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Files can also be sorted by names and time of creation while being played back. The sorting order is set by the VirtualGrabberSortMode registry parameter (see Registry keys reference guide)

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When playing files, the system sends events to the Debug window showing the playback status – see CAM. There also are reactions for controlling videos playback in virtual grabber using scripts see GRABBER.