Datasheet
AXIS 212 PTZ/AXIS 212 PTZ-V- Technical Specifications
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The following factors are among the most important to consider:
• High image resolutions and/or lower
compression levels result in larger images. Bandwidth affected.
• Access by large numbers of Motion JPEG and/or unicast MP
EG-4 clients. Bandwidth affected.
• Simultaneous viewing of different streams (resolutio
n, compression) by different 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.
Optimizing your system
To see the bandwidth and frame rate currently required by the video stream, the AXIS 212 PTZ/AXIS 212 PTZ-V
provides a tool that can be used to display these values 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 Vi
deo & 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, (for example, 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
• audio 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 i
f 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.