.. _video-surveillance:

****************************************************
Video Surveillance
****************************************************

.. rubric:: In this chapter:

.. contents::
   :local:



.. _video-wall:

Video Wall
===========================

The FindFace Multi Video Wall allows for basic video surveillance. Use it to display the video image from cameras and video files.

.. important::
   Advanced video surveillance is available with :ref:`Video Recorder <video_recorder>`.


Display Video
-------------------------------

The Video Wall offers two modes, four predefined layouts in each: 

* video streaming
* video streaming with object detection and episode feed

To display video on the Video Wall, do the following:  

#. Navigate to the :guilabel:`Video Wall` tab.
#. Select a mode and camera layout.

    |video_wall_en|
 
     .. |video_wall_en| image:: /_static/video_wall_en.png
        :scale: 50%

     .. |video_wall_ru| image:: /_static/video_wall_ru.png
        :scale: 50%

#. Drag-n-drop cameras of your choice to the Video Wall. 

You can work with the episode and event feed on the Video Wall in the :ref:`same manner <events-episodes>` as with the :guilabel:`Episodes & Events` tab, including the same filters that are available for episodes and events.

.. note::
   See the full list of :ref:`episode filters <episode-filters>` and :ref:`event filters <event-filters>` applicable to the Video Wall.


.. _video_recorder:

Video Recorder
=========================

.. _vms-camera:

Enable Video Recording
-----------------------------------

If a Video Recorder is :ref:`deployed <installer>` and :ref:`configured <configure-vms>`, you will see the :guilabel:`Record video` checkbox appear in the main camera settings. Check it to enable recording video chunks from a camera and sending them over to Video Recorder for further processing. 

     |camera_recording_en|

     .. |camera_recording_en| image:: /_static/camera_recording_en.png
        :scale: 70%

     .. |camera_recording_ru| image:: /_static/camera_recording_ru.png
        :scale: 70%

.. _video-player:

View Camera Video in Video Player
-------------------------------------------

Under :ref:`specific settings <configure-vms>`, clicking on the camera preview opens up not a static frame, but a video player, streaming live video from the camera.

     |camera_player_click_en|

     .. |camera_player_click_en| image:: /_static/camera_player_click_en.png
        :scale: 60%

     .. |camera_player_click_ru| image:: /_static/camera_player_click_ru.png
        :scale: 60%


     |player_en|

     .. |player_en| image:: /_static/player_en.png
        :scale: 40%

     .. |player_ru| image:: /_static/player_ru.png
        :scale: 40%
  

The video player has a highly intuitive design. It provides the following possibilities:

#. Stream live video from the camera.
#. Watch video chunks recorded from the camera. They will be marked in purple on the timeline. To quickly switch from archived video to the camera live stream, click the :guilabel:`Live` button.
#. Visual indication of moments corresponding to face or vehicle events (if enabled) as colorful markers on the timeline. The unmatched events are marked in pink, while the matched ones are light green. 

   .. note::
      This feature is optional and must be pre-configured. See :ref:`configure-vms`.

   .. important::
      The time on the timeline is displayed in the spectator's time zone. For example, if an event happened at 2 p.m. in Abu Dhabi, its marker would be at 12 p.m. for a spectator in Paris.
 
#. Navigate to the past and future over the timeline, with the possibility of zooming it in and out. 
 
   .. tip::
      You can navigate along the timeline by using the :guilabel:`<` / :guilabel:`>` buttons, or by moving the cursor along the timeline with the right mouse button held down.

   .. tip::
      To zoom in and out, use the mouse wheel with Ctrl.  

#. To export selected clips, select the interval and click :guilabel:`Download`.

       |player_export_en|

     .. |player_export_en| image:: /_static/player_export_en.png
        :scale: 60%

     .. |player_export_ru| image:: /_static/player_export_ru.png
        :scale: 60%