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performance is not guaranteed at the capacity limits; if you need to scale, please use a
remote server.
• If you are streaming to Apple devices such as iPhones, iPads or iPods, you must also
select the following:
• Audio Encoding: Select AAC-LC.
• Output Resolution: If you are streaming to older Apple devices, select one of the
resolutions ending in /15p (e.g., 320x240/15p). If your input is PAL, these resolutions
will be shown ending in /12.5p. Newer devices may be able to support higher
resolutions.
Direct HTTP Streaming
Direct HTTP Streaming is an output mode whereby clients open a standard HTTP connection to
the 9223 and issue a standard HTTP GET request. The 9223 will send the appropriate HTTP
response followed by the encoder bitstream; the bitstream will be transmitted for as long as the
client maintains the connection. Since HTTP runs on top of the TCP protocol, it is possible for
the 9223 to deliver content over the Internet using this mode. However, it has the following
limitations:
• The 9223 has to send one independent copy of the bitstream to each client. There is a
limit of 5 clients or 20 Mb/s per Ethernet port in this mode.
• The TCP protocol is capable of flow control; if the client is not fast enough, or if the
network between the 9223 and the client is not fast enough, the protocol will attempt to
throttle the encoder, which is not possible. The 9223 will buffer a small amount of
bitstream in this case, but if the overall performance of the client/network link
combination is insufficient to support the configured encoder data rate, the 9223 will drop
transport packets.
Direct HTTP Streaming has one single parameter:
• Listening Port: Use this to select the TCP port to be used by the 9223 to listen to HTTP
connections. Please note that the 9223 will not accept the values 22, 23 and 80
parameter. The listening ports for Encoders 1 and 2 can be set independently (and can be
set to the same value if desired).
4
The 9223 has an internal Web Server running on port 80.
53
4
for this
9223-OM (V2.5.0)
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