Axis Q9216-SLV User Manual page 25

AXIS Q9216-SLV Network Camera
The device interface
Lock aperture: Turn on to keep the aperture size set by the Aperture slider. Turn off to allow the camera to automatically adjust
the aperture size. You can, for example, lock the aperture for scenes with permanent light conditions.
Aperture: Use the slider to adjust the aperture size, that is, how much light passes through the lens. To allow more light to enter
the sensor and thereby produce a brighter image in low-light conditions, move the slider towards Open. An open aperture also
reduces the depth of field, which means that objects close to or far from the camera can appear unfocused. To allow more of
the image to be in focus, move the slider towards Closed.
Exposure level: Use the slider to adjust the image exposure.
Defog : Turn on to detect the effects of foggy weather and automatically remove them for a clearer image.
Note
We recommend you not to turn on Defog in scenes with low contrast, large light level variations, or when the autofocus is
slightly off. This can affect the image quality, for example, by increasing the contrast. Furthermore, too much light can
negatively impact the image quality when defog is active.
Stream
General
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.
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.
H.26x encoding
Zipstream: 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 desired level of bitrate reduction:
• 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.
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.
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