Axis 207W User Manual download pdf (Page 53)

AXIS 207W/AXIS 207MW - Technical Specifications

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 importan

t 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 ca

mera’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

ate 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

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.

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Axis 207W User Manual Page 53

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