Cobalt Digital COMPASS 9223-SA Dual-Channel 3G_HD_SD MPEG-4 Encoder Unit User Manual

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9223SA-OM (V2.0)

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-SA and issue a standard HTTP GET request. The 9223-SA 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-SA to deliver content over the Internet using this mode. However, it has
the following limitations:

•

The 9223-SA 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-SA and the client is not fast enough, the protocol will attempt
to throttle the encoder, which is not possible. The 9223-SA 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-SA 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-SA to listen to
HTTP connections. Please note that the 9223-SA will not accept the values 22, 23 and
80

for this parameter. The listening ports for Encoders 1 and 2 can be set independently

(and can be set to the same value if desired).

The URL for accessing the bitstream will be:

http://encoder_ip:port/encoder1

(access to encoder1)

http://encoder_ip:port/encoder2

(access to encoder2)

The 9223 has an internal Web Server running on port 80.