General Performance Considerations; Optimizing Your System - Axis 207W User Manual

General performance considerations

When setting up your system, it is important to consider how various settings and
situations will affect performance. Some factors affect the amount of bandwidth (the bit
rate) required, others can affect the frame rate, and some will affect both. If the load on the
CPU reaches its maximum, this will also affect the frame rate.
The following factors are among the most important to consider:
• Wireless conditions.
• High image resolutions and/or lower compression levels result in larger images.
Bandwidth affected.
• Access by large numbers of Motion JPEG and/or unicast MPEG-4 clients. Band-
width affected.
• Simultaneous viewing of different streams (resolution, compression, etc.) by dif-
ferent clients. Frame rate and bandwidth affected.
• Accessing both Motion JPEG and MPEG-4 video streams simultaneously. Frame
rate and bandwidth affected.
• Heavy usage of event settings affects the camera's CPU load. Frame rate affected.
• Enabled motion detection. Frame rate and bandwidth affected.
• Heavy network utilization due to poor infrastructure. Bandwidth affected
• Viewing on poorly performing client PC's lowers perceived performance. Frame
rate affected.
There 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.
If supported on the network, consider also using MPEG-4 multicasting, as the bandwidth
consumption will be much lower.

Optimizing your system

The AXIS 207W/AXIS 207MW provides a tool that can be used to display the bandwidth
and frame rate currently required by the video stream, directly in the video image.
To do this, special format strings are added as part
of a text overlay. Simply add #r (average frame
rate in fps) and/or #b (average bandwidth in kbps)
to the overlay.
For detailed instructions, please see the online help
for Video & Image > Overlay Settings, and the
help for File Naming & Date/Time Formats.
AXIS 207W/AXIS 207MW - Technical Specifications
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