71Axis video server - Technical specificationsBandwidthAs there are many factors affecting bandwidth, it is very difficult to predict the requiredamounts. The settings that affect bandwidth are:• the image resolution• the image compression• the frame rate• the MPEG-4 object type• the MPEG-4 GOV structure• the analog cameras connected to the video servervideo server• the audio settingsThere are also factors in the monitored scene that will affect the bandwidth. These are:• the amount of motion• the image’s complexity• the lighting conditions.For MPEG-4, if there is only limited bandwidth available, and if this is more importantthan the image quality, using a constant bit rate (CBR) is recommended. Use a variable bitrate (VBR) if the image quality needs to be maintained at a higher level. If supported on thenetwork, consider also using MPEG-4 multicasting, as the bandwidth consumption will bemuch lower.
