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Resolution: Select the image resolution suitable for the surveillance scene. A higher resolution increases
bandwidth and storage.
Frame rate: To avoid bandwidth problems on the network or reduce storage size, you can limit the frame rate
to a fixed amount. If you leave the frame rate at zero, the frame rate is kept at the highest possible rate under
the current conditions. A higher frame rate requires more bandwidth and storage capacity.
P-frames: A P-frame is a predicted image that shows only the changes in the image from the previous frame.
Enter the desired number of P-frames. The higher the number, the less bandwidth is required. However, if
there is network congestion, there could be a noticeable deterioration in the video quality.
Compression: Use the slider to adjust the image compression. High compression results in a lower bitrate and
lower image quality. Low compression improves the image quality, but uses more bandwidth and storage
when you record.
Signed video : Turn on to add the signed video feature to the video. Signed video protects the video from
tampering by adding cryptographic signatures to the video.
Zipstream
Zipstream is a bitrate reduction technology, optimized for video surveillance, that reduces the average bitrate in
an H.264 or H.265 stream in real time. Axis Zipstream applies a high bitrate in scenes where there are multiple
regions of interest, for example, in scenes with moving objects. When the scene is more static, Zipstream applies
a lower bitrate, and thereby reduces the required storage. To learn more, see Reducing the bit rate with Axis
Zipstream
Select the bitrate reduction Strength:
• Off: No bitrate reduction.
• Low: No visible quality degradation in most scenes. This is the default option and it can be used in all
types of scenes to reduce the bitrate.
• Medium: Visible effects in some scenes through less noise and a slightly lower level of detail in
regions of lower interest, for example, where there’s no movement.
• High: Visible effects in some scenes through less noise and a lower level of detail in regions of lower
interest, for example, where there’s no movement. We recommend this level for cloud-connected
devices and devices that use local storage.
• Higher: Visible effects in some scenes through less noise and a lower level of detail in regions of lower
interest, for example, where there’s no movement.
• Extreme: Visible effects in most scenes. The bitrate is optimized for smallest possible storage.
Optimize for storage: Turn on to minimize the bitrate while maintaining quality. The optimization does not
apply to the stream shown in the web client. This can only be used if your VMS supports B-frames. Turning on
Optimize for storage also turns on Dynamic GOP.
Dynamic FPS (frames per second): Turn on to allow the bandwidth to vary based on the level of activity in the
scene. More activity requires more bandwidth.
Lower limit: Enter a value to adjust the frame rate between minimal fps and the stream default fps based on
scene motion. We recommend you to use lower limit in scenes with very little motion, where the fps could
drop to 1 or lower.
Dynamic GOP (Group of Pictures): Turn on to dynamically adjust the interval between I-frames based on the
level of activity in the scene.
Upper limit: Enter a maximum GOP length, that is, the maximum number of P-frames between two I-frames.
An I-frame is a self-contained image frame that is independent of other frames.
Bitrate control
AXIS A8207-VE Mk II Network Video Door Station
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