427-0033-00-12 Version 110
February 2019
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Advanced Configuration
The parameters in the Encoding 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.
For the video streams, the Codec options are H.264 or
MJPEG. MJPEG requires the most amount of processing.
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 video at or near the target bit rate.
When the Rate Control parameter is set to VBR (Variable Bit Rate), the Bit Rate parameter is used
as an upper limit bit rate and the system keeps the stream at or under the target bit rate.
The I-Frame Interval parameter controls the number of P-frames used between I-frames. I-frames
are full frames of video and the P-frames contain the changes that occurred since the last I-frame. A
smaller I-Frame Interval results in higher bandwidth (more full frames sent) and better video quality.
A higher I-Frame Interval number means fewer I-frames are sent and therefore results in possibly
lower bandwidth and possibly lower quality.
The Resolution parameter controls the video resolution and therefore can have a large impact on
bandwidth usage.
The higher the resolution, the larger the size of the frame and the higher the
network bandwidth required
.
As a rule of thumb, if the video will be viewed on its own and on a reasonably large screen, a large
image size setting may look better. On the other hand, if the video is shown as a tile in a video wall,
a smaller image size may look as good and consume less bandwidth.
3.1.4
Thermal Image Setup - IR Page
In most installations it is not necessary to change the default settings of the thermal camera.
However in some situations, depending on weather, time of day, or scene, it may be useful to make
changes to the video image to enhance the image by modifying one or more parameters. Be aware
that when the conditions change the camera may need to be adjusted again; it is also a good idea to
know how to restore the factory default settings.
AGC ROI
In the
IR
page, a single JPEG image (a snapshot) is displayed in the upper right-hand corner. To
update this image at any time, select the
Refresh
button in the upper right. This will cause the entire
