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General information about the virtual Video capture device
Axxon PSIM implements a way to work with a virtual Video capture device. This way assumes that Axxon PSIM 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 Axxon PSIM:
- Virtual bench. It plays back video recordings in mkv, mp4 and avi formats for which DirectShow codecs are installed on Windows OS.
- Virtual. It plays back video recordings in the Axxon PSIM internal format only.
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 earlier versions) is installed on Windows OS to play video recordings, then you must updated it to Windows Media Player 12 or use the DirectShow filters (codecs) of the third-party manufacturers.
Note
Enable Desktop Experience Feature when using the virtual video capture device on Server OS and avi files.
Creating and configuring the virtual Video capture device
Create and configure the virtual Video capture device as follows:
- Set the Use virtual grabber checkbox (see The Settings panel of the Video subsystem section). Before that shut down Axxon PSIM.
- On the Hardware tab (1) create the Video capture device object (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 the video signal (3).
- Click the Apply button (4).
- Create the Camera child object for the Video capture device (2).
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
We don't recommend using videos compressed by the Wavelet codec, as their use significantly increases the load on the Server.
Click the Apply button (5).
If Axxon PSIM does not find files for playback within one minute after clicking the Apply button, the file search will be interrupted.
Attention!
The selected folder must not contain the video recordings of the Axxon PSIM internal format and AVI files at the same time.
We recommend using one video recording and specifying 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 Axxon PSIM work when switching between the recordings.
Features of playing back the files in the 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 for the Virtual bench type device in one of the following ways:
- Enter "OPTIONS:playFileOnce=true" in the IP address field on the Video capture device settings panel:
- OPTIONS: enables the use of advanced options.
- playFileOnce corresponds to the "Single Play" option (the parameter name must be specified strictly case-sensitive).
- after the '=' symbol, specify the value that must be applied (the correct values are true, TRUE, or 1 for the "On" value / false, FALSE or 0 for the "Off" value).
- 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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