Streaming
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VGA Grid User Guide
How the broadcast will be delivered to its viewers depends on the number of
intended viewers and where the viewers are in relation to where the broadcast is
originating. Are they on the same LAN or will they be accessing the broadcast from
an external network? The answers to the above questions will help decide the
delivery method of the broadcast.
The VGA Grid can support streaming over HTTP, RTSP, peer-to-peer RTP connection,
multicast RTP and a Content Distribution Network (CDN) broadcast network. Each
broadcast delivery method will be now discussed in more detail.
8.1
HTTP or RTSP Streaming
For HTTP or RTSP streaming the only information required to view the broadcast is
the URL of the broadcast. The VGA Grid is ready to go straight out of the box,
without any additional settings. If your broadcast needs to be accessed by many
clients, use a Content Distribution Network as explained in the Using a Content
Distribution Network section.
8.2
Using an IP Multicast Network
A multicast RTP stream provides a one-to-many broadcasting framework. In a
multicast RTP configuration, the VGA Grid sends a packet only once to a router that
supports multicasting. This router then distributes the packets to all intended viewer
nodes using a multi-cast protocol.
Sending multicast streams requires equipment that supports multi-casting,
configuring your network and enabling specific multicasting features on the VGA
Grid. Multicast architectures are used predominantly within a high bandwidth
corporate LAN and not on Internet based architectures. Multicast RTP streaming is
not usually propagated outside the LAN though it may be propagated through VPNs
connecting several LANs. Multicast transmission is available during RTP streaming.
A special case of multicasting is a peer-to-peer connection. In this scenario, a logical
connection is established with a single client node. It does not require a request
from the viewer to start sending data. Only one copy of the data is sent. The
multimedia stream is always sent to the specified IP address configured in the
RTP/UDP Push settings. A peer-to-peer connection is only available during RTP or
Содержание VGA Grid
Страница 8: ... Table of Contents 4 VGA Grid User Guide 22 List of Figures 115 23 Configuration Worksheet 120 ...
Страница 23: ...Getting Started 19 VGA Grid User Guide Figure 10 Web Admin Interface s Main Menu ...
Страница 26: ...Signal Flow Diagrams 22 VGA Grid User Guide Figure 11 Data Capture Flow Figure 12 Data Recording Flow ...
Страница 116: ...Sample Configurations 112 VGA Grid User Guide Quality parameter 40 for MJPEG only ...
Страница 125: ...Configuration Worksheet 121 VGA Grid User Guide ...