Announcements - VBrick 9000 Admin Manual

Notes:
• In transmitter mode, a program stream is pushed by a transmitter to one or more
destinations. It is a constant push and there is no client "request" for the stream.
• In a unicast environment, individual copies of the stream are sent from the source
to each configured destination. In multicast, the stream is sent from the source
only once and a network router transmits the stream to multiple destinations.
• To avoid unnecessary network traffic, the transmitter will not send if the network
socket fails to connect (has ICMP errors). In addition, Unicast destinations have a
configurable Unicast ping option. See the Unicast Ping parameter on the Encoder
Configuration > Programs page.
configuration information relating to the stream. Upon power-up and service interruption,
the decoder will re-establish stream decoding by relating back to information contained in
the SDP file. SDP information may be requested via an RTSP request made from the client
to the server whereby the server responds with the same information as contained in an SDP
file. The SDP file may also be retrieved via an HTTP server residing either on the encoder or
on an external HTTP server. The URL address for the SDP file is based on the transmitter
number, for example:
transmitter number.

Announcements

RTP and MPEG2TS. For multicast applications the SDP information is periodically
broadcast to a pre-defined address via multicast announcements. For unicast announcements,
a server can be configured to embed an RTSP URL within an announce message so a remote
decoder can easily gain access to SDP information and subsequently initiate a Unicast RTP
session. In some cases an H.264 stream may be sent to a third-party reflecting server which is
not capable of emitting its own SDP announcements. Transmitters and servers can be
configured to provide announcements advertising the URL of the reflected stream and/or
required SDP information.
VBrick 9000 Encoder Admin Guide
http://<encoder_ip_address>/vbStream1x.sdp
Encoder Configuration
where: is the
x
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