Video Stream Parameters - FLIR D-Series C Installation Manual

3 Advanced Configuration
3.6

Video Stream Parameters

From the Maintenance menu, it is
possible to modify the video stream
parameters by selecting the Sensor >
Modules > Video page. Various
parameters that affect both image
quality and transmission bandwidth
are available.
By default, two video streams are
enabled for the thermal (IR) camera
(Video 0 and Video 1) and two for the
daylight (DLTV) camera (Video 3 and
Video 4). The Video 0 and Video 2
streams are available for viewing from
a client program such as FSM, a stand-
alone video player, or a third-party
VMS. The Video 1 and Video 3
streams are used by the web browser
Live Video display.
To modify parameters that affect a particular IP Video stream from the camera, select the appropriate
link at the top (for example, Video 0). For a video stream that is used by the Live Video web page, it is
only possible to change the frame rate and image size.
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.
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
preferred settings. As a result, many of the details are established dynamically, which may run
contrary to network security requirements.
3-12 427-9030-01-12 Rev 130 Mar 2014