427-0100-00-12 Version 100
December 2018
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The information contained herein does not contain technology as defined by EAR,15 CFR772, is publicly available, and therefore not subject to EAR.
Operation
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 Rate Control to:
•
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.
•
VBR (variable bit rate): The Bit Rate parameter defines the average 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.
With the MJPEG codec, you can set the Quality parameter.
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.
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.
