Settings - FLIR Nexus Configuration Manual

3 Advanced Configuration
To set the camera to use Multicast, set the
Enable Multicast parameter to "yes", and
set the Destination Network address and
Destination Port to a unique combination
that will not conflict with other IP Video
devices on the network (the Destination
Port must be an even number).
If more than one camera is providing
multicast streams on the network, be sure
to configure each stream with a unique
multicast Destination Network IP address
and Destination Port combination. The
destination address on each camera will
default to 232.0.1.1 when the Enable
Multicast parameter is set to "yes".
3.8.3

Settings

The parameters in the Settings section will have a significant impact on the quality and bandwidth
requirements of the video stream. In general it is recommended that the default values are used
initially, and then individual parameters can be modified and tested incrementally to determine if the
bandwidth and quality requirements are met. The proper settings for a given installation will depend
on many factors, including the network capabilities, the processing power in the camera as well as the
client computer, the scene contrast, and personal preferences. When the installer is faced with
limitations (such as restricted bandwidth due to a wireless network link), it will be necessary to
compromise image size, frame rate, and/or image quality in order to achieve an acceptable video
stream.
For each video stream, the Codec Type
options are MPEG4, H.264 or MJPEG. MPEG4
requires the least amount of processing, and
H.264 requires the most. See section 3.8.4
"MJPEG Codec Type" for additional notes on
the MJPEG type, which is used by the Live
Video stream.
The Bit Rate parameter is only used when the
Rate Control parameter is set to CBR (Constant
Bit Rate). With the CBR setting, the system
attempts to keep the resulting bit rate of the
video at or near the target bit rate.
By default, the Rate Control parameter is set to
CVBR (constrained variable bitrate) for MPEG4
and H.264 streams. The VBR (variable bit rate)
option attempts to maintain a specified quality at
a constant level by varying the bit rate
depending on the scene content. The CBR
(constant bit rate) option uses a best effort
attempt to adhere to the Bit Rate setting; with high contrast/detail scenes, the quality may be
compromised due to the bit rate limitation. With the CVBR option, the stream may exceed the bitrate
momentarily while attempting the maintain the quality level.
427-0030-00-28 Version 110 Jun 2013 3-15