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Stream Acquisition
<Transfer Protocols>
The RTSP function of the cameras supports the
following transfer protocols to stream video
and/or audio from the camera to client(s).
a) TCP bitstream
b) UDP unicast bitstream
Details of each case above are described in the
following sections.
<Number of Media Streams>
The cameras support multiple codec
simultaneously as mentioned in the previous
"RTSP Request URL" (page 73). The number of
media streams in an RTSP session of the camera
is up to 5.
<RTSP Session Timeout>
Time-out period of RTSP session on the cameras
can be set with "RTSPTimeout" of CGI parameter.
Default setting is 60 (unit: second). When the
value is set to 0, RTSP session will not time-out.
For more information to change the setting of
Time-out period of RTSP from Admin menu via
Web browser, refer to "Streaming" tab in
"Streaming" menu in Operating Instructions.
The RTSP session timeout value of the camera is
indicated to a client as a "timeout" parameter (in
seconds) in RTSP response to the "SETUP"
request. However, when the timeout value is set
to 0, the timeout parameter does not exist in the
response.
To keep an RTSP stream alive, examples in this
document use the RTSP "GET_PARAMETER"
method before the camera automatically closes
the RTSP session in accordance with the timeout
parameter.
<Closing RTSP Session>
To close UDP port linked to RTSP session and this
session safely, use RTSP method "TEARDOWN."
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