Axis Communications Security Camera 209MFD User Manual

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AXIS 209MFD/MFD-R/MFD-R M12
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:
• High image resolutions and/or lower compression l
evels result in larger images. Bandwidth
affected.
• Access by large numbers of Motion JPEG and/or uni
cast MPEG-4 clients. Bandwidth affected.
• Simultaneous viewing of different streams (resolution,
compression, etc.) by different clients.
Frame rate and bandwidth affected.
• Accessing both Motion JPEG and MPEG-4 video
streams simultaneously. Frame rate and band-
width affected.
• Heavy usage of event settings affects the c
amera’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.
Optimizing your system
To see the bandwidth and frame rate currently required by the video stream, the AXIS
209MFD/MFD-R/MFD-R M12 provides a tool that can be used to display these values directly in the video
image.
To do this, special format strings are add
ed 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 > Text Overlay Settings, and the help for File Naming &
Date/Time Formats.
Important!
•The figures displayed here are the values as delivered by the camera. If other restrictions are currently in force,
(e.g. bandwidth limitation) these values might not correspond to those actually received by the client.
•For Motion JPEG, these values will be accurate as long as no frame rate limit has been specified.
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

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