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Broadcast Method: There are several different broadcast types for streaming Real format video to a
Helix Server, as follows:
• Push, Account-Based Login (Helix Server)
o Account-based, push broadcasting allows you to send a stream to Helix Server
version 9 or later. In this method, Cisco Digital Media Encoder 2000 maintains a
monitoring connection to Helix Server. This connection allows it to pass a user name
and password to authenticate access to the server. Helix Server uses this connection to
send statistics about the broadcast stream back to Cisco Digital Media Encoder 2000.
• Push, Password-Only Login (Helix Server)
o Unlike account-based broadcasting, password-only broadcasting does not establish a
monitoring connection. Therefore, this type of broadcasting requires less network
overhead, but receives no feedback from Helix Server. This broadcast method allows
you to send a live stream to Helix Server version 9 or later. However, you must set up
the server as a receiver in a splitting arrangement. Please refer to Helix Server
documentation for details.
• Push, Multicast (Helix Server)
o In a multicast, Cisco Digital Media Encoder 2000 can deliver the same broadcast
stream to any number of Helix Servers without increasing its outgoing bandwidth.
The Helix Servers will need to be pre-configured for a multicast from Cisco Digital
Media Encoder 2000. Refer to your Helix Server documentation for details.
• Pull (Helix Server)
o In pull broadcasting, Cisco Digital Media Encoder 2000 begins to generate broadcast
packets as soon as you start the encoding. However, it does not deliver the broadcast
stream until Helix Server requests the stream, which occurs when the first
RealPlayer
bandwidth between Cisco Digital Media Encoder 2000 and Helix Server when no one
is viewing the broadcast. This broadcast method allows you to send a stream to Helix
Server version 9 or later.
• Legacy Push (8.x, 7.x, G2)
o The legacy push method is similar to the account-based push method. However, the
legacy push does not use a monitoring connection to provide server feedback and
statistics and is not as robust a broadcast method as an account-based push. Use this
broadcasting method only when sending a broadcast stream to a server that predates
Helix Server version 9, such as RealSystem
Transport Protocol: When you use a push broadcast method, you specify whether to use UDP or
TCP upon delivering the broadcast stream to Helix Server. UDP is the preferred protocol due to the
lower network overhead. But you may want to use TCP when delivering the broadcast over a lossy
environment.
Cisco Digital Media Encoder 2000 User Guide
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