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If there live video with audio or the archive is recorded with audio, then video transmission with audio through RTSP Server is supported—for this specify the ID of microphone from which the archive is recorded when requesting video (see Examples of addresses to view video from RTSP Server). For the audio to play correctly in VLC Media Player, set the VLC player compatibility mode checkbox (see below).

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Features of the Multicast mode:

  1. To get a multicast video in Axxon PSIM (see Configuring multimedia receipt using RTSP protocol), set the multicast value to the RTSP parameter in the HKEY_LOCAL_MACHINE \SOFTWARE\AxxonSoft\PSIM\Video\TransportProtocols registry section (for 64-bit system the path is HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\AxxonSoft\PSIM\Video\TransportProtocols) on computer where the Camera object is created. For detailed information on this parameter, see Changing the transport protocol used by IP-device.
  2. RTSP Server can broadcast simultaneously in Multicast and Unicast modes. Receiving both such streams on the Axxon PSIM client is impossible due to RTSP key, which determines the connection mode (see above). However, the VLC player allows receiving streams in both modes at the same time.
  3. The ports that are assigned to each camera in this mode will not be displayed in the Windows OS Resource Monitor and other similar operating system resource monitors.

Using the Multicast mode allows you to reduce the load on the server by reducing the amount of transmitted data. To distribute the transmitted signal among different RTSP ports, do the following:

  1. Go to the settings panel of the RTSP Server object.

  2. Set the Multicast checkbox. The Port column is displayed in the Cameras table.

  3. Specify a data transmission port for each camera in the Port field. When you specify ports, note the following:

    1. The following ports are used for each camera in the Multicast mode: nPort, nPort + 18000 (rtp), nPort + 19000 (rtcp), where nPort is a port number specified for camera in the Port column.
      For the correct operation of RTSP server in the Multicast mode, these ports must be free.
    2. Specified ports are not addressed directly. Use RTSP port to get video from all cameras in the Multicast mode (see step 5).

    3. Event if you specify video data port, you still must specify camera number in the data source address (see Examples of addresses to view video from RTSP Server).


  4. In the Receiver IP address field, specify the address from which the broadcast in the Multicast mode will be performed. Address must be in the range from 224.0.1.0 to 239.255.255.255. By default, the receiver IP is 224.0.1.150. When you specify Receiver IP address, note the following:

    1. 224.0.0.0-224.0.0.255 address range is reserved for routing protocols and other service protocols. You cannot set Receiver IP address from the specified range.

    2. RTSP server can broadcast only to one network simultaneously. The network with minimal metric is selected by default. To change the broadcast network, go to the Advanced settings tab (see below).

    3. When you configure several RTSP Servers in Multicast mode, you must specify different values for them in the Receiver IP address and RTSP port fields.
  5. In the RTSP port field, specify the number of port through which video signal will be sent in the Multicast mode. When requesting video data from the camera using the RTSP protocol, it is necessary to specify this port. The system forwards the request to the port of the requested camera.

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  1. Go to the Advanced settings tab.

  2. If the current time must be sent to VLC Media Player instead of the frame time, then set the VLC player compatibility mode checkbox. You can use this option when there are problems with playing back the archive received over RTSP in VLC Media Player.

  3. If RTSP Server is used to broadcast video data to the ECHD system, then for the correct operation of navigation through the archive, set the ECHD compatibility mode checkbox.

  4. If there are captions on the video (see Configuring captions display on a video image), set the Use captions track checkbox to send them together with video via RTSP Server and to display them in the receiving app—VLC player.
    Also, when this checkbox is set, time captions are added to the video image in the format YYYYMMDDTHHMMSSZ. If the video is archived (see Examples of addresses to view video from RTSP Server), then the captions show the archive time. However, if the VLC player compatibility mode checkbox is set together with the Use captions track checkbox, the time in the captions is current.

    Note
    titleAttention!

    Correct video playback and captions operation are guaranteed in VLC Media Player version 2.0.0. These features are not guaranteed to work in other versions of VLC Media Player or other programs.

  5. If you want to eliminate a delay of several seconds when requesting a video via RTSP, set the Hot connection mode checkbox.
    Info
    titleNote

    The delay when requesting a video via RTSP can also depend on the camera key frame rate (FPS) settings or the frame buffer size settings in the player.

  6. From the Source IP interface drop-down list, select the name of the network interface that must be used to broadcast the RTSP server.

  7. If the RTSP Server is used for broadcasting the video data to the ECHD system, and the Video surveillance servers are behind NAT, then it is necessary to specify the NAT settings:

    1. In the IP address field, specify the IP address of the router that performs the NAT broadcasting.

    2. In the Port field, specify the port of the router, which is accessed by the client when executing the ECHD requests.

      Info
      titleNote

      To enable the substitution of the router's specified IP address and port to the ECHD requests, it is necessary to set the corresponding checkbox on the settings panel of the Web-Server object—see Enabling the processing of SDC (ECHD) requests and selecting the RTSP server.

  8. In the Number of threads (min/) field, specify the value that corresponds to the initial number of threads that are created when the RTSP Server is started. The default value is 1.
  9. In the Number of connections per thread field, specify the value that corresponds to the maximum number of client connections per thread, with equal distribution. If this parameter is exceeded, a new thread is created. The default value is 20.
  10. In the Number of threads (/max) field, specify the value that corresponds to the maximum allowed number of threads that can be created. If there are too many threads, server rejects additional connections. The default value is 100. 

  11. Click the Apply button to save the settings.

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