User's Guide

427-0100-00-12 Version 110 April 2019 19
WARNING - EAR Controlled Technical Data
Operation
Unified 2
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 Rate Control to:
• CBR (constant bit rate): The Bit Rate parameter defines the target b
it rate; the camera attempts
to keep the video at or near the target bit rate.
• VBR (variable bit rate): The Bit Rat
e parameter defines the average bit rate.
The I-Frame Interval parameter controls the number of P-frames used betwe
en 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.