Documentation for Intellect 4.11.0-4.11.3. Documentation for other versions of Intellect is available too.

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General information about the virtual Video Capture Device

Intellect implements a way to work with a virtual Video Capture Device. This way assumes that Intellect operates in a test mode and imitates the video stream feed to virtual Video Capture Device by playing back videos (video recordings). There are two types of virtual Video Capture Devices in Intellect: 

  1. Virtual bench. It plays back video recordings in mkv, mp4 and avi formats for which DirectShow codecs are installed on Windows OS.
  2. Virtual. It plays back video recordings in internal Intellect format and files in .avi format.

Attention!

Video recordings with b-frames are not supported.

Virtual Video Capture Devices do not support multistreaming. To ensure the correct operation of a virtual Video Capture Device, including displaying the video archive and archiving, disable the multistreaming (see Configuration of multistream video).

It is not recommended to use LAV Splitter to playback video recordings in the Virtual Video Capture Device. The FFDSHOW mediadecoder is preferable.

Note

 If only Windows Media Player 11 (or its older versions) is installed on Windows OS to view video recordings, then you should updated it to Windows Media Player 12 or use the DirectShow filters (codecs) of the third-party vendors.

Note

Enable Desktop Experience Feature when using the virtual Video Capture Device on Server OS and the avi files.

Creating and configuring the virtual Video Capture Device

Create and configure the virtual Video Capture Device as follows:

  1. Set the Use virtual grabber checkbox (The Settings panel of the Video subsystem section). Before that shut down Intellect.
  2. On the Hardware tab (1) create the Video Capture Device object (2).
  3. 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 the video signal (3).
  4. Click the Apply button (4).
  5. Create the Camera child object for the Video Capture Device (2).

  6. Specify the storage for the video recording that is used for the video signal imitation in the Basic settings tab (3) of the selected Camera object (4).        


    Note

    It isn’t recommended to use videos compressed by the Wavelet codec, as their use significantly increases the load on the Server.

  7. Click the Apply button (5).
    If Intellect does not find files for playback within one minute after clicking the Apply button, the file search will be interrupted.

Attention!

The selected folder should not contain the video recordings of the internal Intellect format and AVI-files at the same time.

It is recommended to use one video recording and specify the folder containing only the recording or the path to the file. If you need to use several video recordings, select the recordings with similar codec and resolution. This will help to avoid delays in Intellect work when switching between the recordings.

Features of playing black the files in the virtual Video Capture Device

As a result of the above settings, the 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 for the Virtual bench type device in one of the following ways:

  1. Enter "OPTIONS:playFileOnce=true" in the IP address field on the Video Capture Device settings panel:
    1. OPTIONS: enables the use of advanced options.
    2. playFileOnce corresponds to the "Single Play" option (the parameter name should be specified strictly case-sensitive).
    3. after the '=' symbol specify the value that should be applied (the correct values are true, TRUE, or 1 for the "On" value / false, FALSE or 0 for the "Off" value).

  2. Set the ​playFileOnce = 1 registry key (see Registry keys reference guide).

If there are several files in the folder, they will be played back in the order set in the latest modification. Files can also be sorted by name and time of creation during playback. The sorting order is set by the VirtualGrabberSortMode registry parameter (see Registry keys reference guide).

When playing back the files, the system sends events to the Debug window displaying the playback status (see CAM Camera). There are also reactions for controlling video recordings playback in virtual Video Capture Device using the scripts (see GRABBER Video capture device).

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