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3
Advanced Configuration
(for example, camera name, date/time, etc.) as an overlay on the video. The OSD text will appear on
the IP video streams as well as the analog video output. Use the Alarm Manager page to define rules
for internal camera alarms from Video Analytics, Radiometric IR, or GPIO.
Video: By default, four video streams are enabled for the camera: Video 0, Video 1, Video 2, and
Video 3. The Video 0 and Video 1 streams are available for viewing from a client program such as
FSM, a stand-alone video player, or a third-party VMS including ONVIF systems. Video 2 is used for
snapshots (and image capture when it is an alarm, and Video 3 is used by the web browser Live
Video display, and both of these channels use the MJPEG encoder exclusively.
By default, Video 0 uses H.264 encoding and Video 1 uses MPEG 4 encoding. To modify parameters
that affect a particular IP Video stream from the camera, select the appropriate link at the top of the
page (for example, Video 0).
With the factory configuration, the default parameters provide high-quality full frame-rate video
streams with reasonable bandwidth usage. The default settings for each video stream provide high-
quality, full frame-rate video. In general, for most installations it will not be necessary to modify the
default parameters. However in some cases, such as when a video stream is sent over a wireless
network, it may be useful to "tune" the video stream to try to reduce the bandwidth requirements. In
particular, the RTP Settings, Network Options, and the Settings parameters are described below.
It is possible to adversely affect the performance and/or image quality if changes are done incorrectly
or haphazardly by an untrained person.
There are some challenges with streaming video over an IP network, when compared to other
traditional IP applications which are less time-critical, such as email and web browsing. In particular,
there are requirements which must be fulfilled to ensure satisfactory video quality in professional
security environments. There are many parameters and factors related to network infrastructure,
protocols, codecs and so on that can affect the quality and bit rate of a video stream when it is
established between the camera and a client.
The video streaming is done using a protocol generally referred to as Real-time Transport Protocol
(RTP), but there are actually many protocols involved, including Real-Time Transport Control Protocol
(RTCP) and Real Time Streaming Protocol (RTSP). In the background, a "negotiation" takes place to
establish a session between the client (such as FSM, or a third party VMS or video player) and the
camera. The ports which form a session are negotiated using a protocol such as RTSP. A client
typically requests a video stream using its preferred settings, and the camera can respond with its
427-0073-12-12 Version 120
May 2015
3-18
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