User Guide

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Operation
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427-0300-00-12 - Revision 110 - May 2021
The resolution is 640x512 and the Frame Rate range is 5-30 FPS.
Codecs, Quality, and Bandwidth
The codec used determines which parameters you can set that have a
significant impact on the quality and bandwidth requirements of the video
stream. Use the default values initially, and then individual parameters can be
modified and tested incrementally to determine when bandwidth and quality
requirements are met.
With the H.264 codec, you can set the:
· Rate Control:
o CBR (constant bit rate): The Bit Rate parameter defines the target bit
rate; the camera attempts to keep the video at or near the target bit rate.
o VBR (variable bit rate): The Bit Rate parameter defines the average bit rate.
· I-frame Interval: 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 means fewer I-frames are sent and therefore can result in lower bandwidth and possibly lower
quality.
With the MJPEG codec, you can set the Quality between 10-80. Setting a higher value can increase the
video stream's bandwidth requirements.
Network Options
By default, multicast is enabled. Multicast video packets are shared by streaming clients. Additional
clients do not cause bandwidth to increase as dramatically as with unicast. Video stream requests for
ch0/stream1 are unicast. Client-specific multicast requests vary according to the client.
Visible 1
Visible 2
Thermal 1
If more than one camera is providing multicast streams on the network, make sure the Destination
Network IP address is unique for each camera (the Destination Port can be reused). By default, the port
assignment is unique per stream.
The time-to-live field controls the ability of IP packets to traverse network boundaries. A value of 1
restricts the stream to the same subnet. Greater values allow increasing access between networks.