Bodyline Products International 216FD-V - Manual (Page 61)

61 General performance considerations
Bandwidth
As there are many factors that affect bandwidth, it is very difficult to predict the required
amounts. The settings that affect bandwidth are:
• image resolution
• image compression
• frame rate
• MPEG-4 GOV settings
• bit rate control settings
There are also factors in the monitored scene that will affect the bandwidth. These are:
• amount of motion
• image complexity
• lighting conditions
For MPEG-4, if there is only limited bandwidth available, and if this is more important
than the image quality, using a constant bit rate (CBR) is recommended. Use a variable bit
rate (VBR) if the image quality needs to be maintained at a higher level. If supported on the
network, consider also using MPEG-4 multicasting, as the bandwidth consumption will be
much lower.