Axis Communications Security Camera Axis Communications Security Camera User Manual

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AXIS P3344 Fixed Dome Network Camera
Video and Audio
Setting the compression level a ffects the image quality and bandwidth; the lower the compression, the higher the image quality
with higher bandwidth requirements.
To avoid bandwidth problems on the network, you can limit the frame rate allowed to each viewer. The maximum frame rate can be
set to Unlimited, or you can limit the frame rate to a value.
An image or text can be superimposed over the imag e as overlay. See Overlay, on page 20.
Save your settings before they can take effect.
H.264
H.264, also known as MPEG-4 Part 10/AVC, is a video compression standard that provides high quality video streams at low bit rates.
An H.264 video stream consists of different types of frames such as I-frames, P-frames and B-frames. An I-frame is a complete image
whereas P-frames and B-frames only c ontain the differences from previous/future frames .
The GOV length is the number of frames between two consecutive I-frames. Increasing the GOV length may save considerably on
bandwidth requirements in some cases, but may also have an adverse affect on image quality.
ThebitratecanbesetasVariable Bit Rate (VBR) or Constant Bit Rate (CBR). VBR adjusts the bit rate according to the image
complexity, using up more bandwidth for increased activity in the image, and less for lower image activity. CBR allows you to set a
fixed Ta rget bit rate that consumes a predictable amount of bandwidth. As the bit rate would usually need to increase for increased
image activity, but in this case cannot, frame rate and image quality are affected negatively. To partly compensate for this, it is
possible to prioritize either frame rate or image quality. Not setting a priority means that frame rate and image quality are equally
affected. You must save your settings before they c an take effect.
The current bit rate can be set to appear as text overlay. To do this, select the Include text check box option under Overlay Settings
and enter the code #b in the field.
MJPEG
Sometimes the image size is large due to low light or complex scenery. Adjusting the maxi
mum frame size helps to control the
bandwidth and storage used by the Motion JPEG video stream in these situations. Setting the frame size to the Default setting
provides consistently good image quality at the expense of increased bandwidth and storage usage in low light. Limiting the frame
size optimizes bandwidth and storage usag e, but may give poor image quality. To
prevent increased bandwidth and storage usage,
the maximum frame size should be set to an optimal value.
Stream Profiles
There are four pre-programmed stream profile s available for quick set up. The settings for these can be a djus t ed. New customized
profiles can also be created. Each profile has a descriptive name, indicating its purpose.
•Thestreamprofiles can be accessed from the Stream profile dro p-down list in the Live View page.
• To add, copy, modify, and remove stream profiles go to Video & Audio > Stream Profiles.
• To select the default stream profile go to Live View Config > Stream Profile and choose the profile from the drop-down list.
For more information see the online help
on this page.
Camera Settings
The Video & Audio > Camera Settings page provides access to advanced image settings for the Axis product.
Image Appearance
Increasing the Color level increases the color saturation. The value 100 gives maximum color saturation. The value 0 gives a
black and white image.
The image Brightness can be adjusted in the range 0–100, where a higher value produces a brighter image.
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