User Guide

427-0089-00-12 Version 180 August 2020 47
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Advanced Configuration
There are some challenges with streaming video over an
IP network, when compared to applications which are less
time-critical, such as email and web browsing. 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 FLIR
Latitude, 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 preferred settings. As a result, many of the
details are established dynamically, which may run contrary to network security requirements.
In some networks, the RTP/RTSP traffic is carried (tunneled) over Hypertext Transfer Protocol
(HTTP) as that may allow the traffic to cross network boundaries and firewalls. While this method
involves more overhead due to encapsulation, it may be necessary for clients to access the video
streams when HTTP proxies are used.
RTSP is originated and received on even port numbers and the associated RTCP communication
uses the next higher odd port number; the default RTSP Port is 554.
The default value for the stream from VIDEO - 0 is ch0. For example, the complete connection string
is: rtsp://192.168.0.250/ch0. This stream name can be used to open a video stream with a third-party
video player. By default the video stream uses the IP address of the camera.
3.1.3 IR Page—Thermal Image Setup
In most installations, it will not be necessary to change the thermal camera from the default settings.
However in some situations, depending on weather, time of day and so on, it may be useful to make
Select analog
video format