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FIGURE 2-47: LOCAL RECORDING
2.2.5.4 RTP Settings
Multicast
Here a user can configure multicast RTP streams. RTP is a common way of transmitting and synchronizing surveillance system
video and audio streams over RTSP session. Multicast provides the most efficient usage of bandwidth when there are large
numbers of clients viewing simultaneously.
FIGURE 2-48: RTP SETTINGS
Primary Video Stream
Mode: Set the multicast mode Auto, Manual or Off. When mode is set to Auto, multicast settings are automatically
configured. When mode is set to Manual user is required to manually configure multicast settings. When mode is set to
Off video stream is disabled.
Address: Set the multicast address for RTP video streaming.
Port: Set the multicast port number for RTP video streaming to an even number in the range 1024 to 65534. To disable
the port set value to 0.
Time to Live (TTL): Set the effective scope of multicast distribution for RTP video streaming between 1 and 255. TTL is a
mechanism that limits the lifespan of data in a computer or network. It is implemented by having a counter or timestamp
attached or embedded in the data in order to ensure that data is discarded once the correct time is reached. TTL counter
decrements each time the signal pass through a router, so when the value reaches 0, the signal can no longer be
distributed. For example, if TTL is set to [1], multicast distribution is confined to the local segment only and can not be
distributed by the router.
Always Multicast this stream: Check this box to start on-demand multicast RTP video stream without opening a new
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