Axis Communications 250S Appendix G Bandwidth, Video Bit Rate, Image Quality vs Bit Rate

AXIS 250S User’s Manual Bandwidth 53

Appendix G - Bandwidth

As different networks have different characteristics and different amounts of bandwidth available, the AXIS 250S’s video and audio settings may need to be adjusted to suit the prevailing conditions.

The Video Bit Rate

The video bit rate describes how much video data is transferred per second, and can be configured from 0.25 - 8 Mbit/s. Whether or not you should use the available highest rate depends on the answers to a few questions:

Does your application actually need a video stream at the highest quality? Try viewing the live video stream and uploading MPEG-2 files using several different bit rates. Using the lowest acceptable bit rate is recommended.

Are there other bandwidth-dependent services running on the same network? Will the bit rate used by the AXIS 250S cause problems for these services?

How many clients are likely to be viewing the video stream at any one time? The maximum number of viewing clients on a 100 Mbit switched local area network is 3.

Image Quality vs Bit Rate

The quality of the video stream in relation to the bit rate can be roughly illustrated by the graph below.