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AXIS P5544 PTZ Dome Network Camera
Video and Audio
• The Live View page in Internet Explorer in Windows. Right-click in the image and s ele ct Pixel counter.Usethemouse
to move and resize the rectangle.
Image
The default image settings can be configured under Video & Audio > Video Stream.SelecttheImage tab.
The followi ng settings are available:
• Resolution. Select the default resolution.
• Compression. The compression level affects the image quality, bandwidth and file size of saved images; the lower the
compression, the higher the image quality with higher bandwidth requirements and larger file sizes.
• Maximum frame rate. To avoid bandwidth problems, the frame rate allowed to each v iewer can be limited.
• Overlay settings.SeeOverlay, on page 20.
Click Save to apply the new settings.
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 and P-frames. An I-frame is a complete image whereas
P-frames only contain the differences from previous f rames.
The GOV length is the number of frames between two consecutive I-frames. Increasing the GOV length may s ave 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 Target bit rate that consumes a predictable amount of band width. As the bit rate would usually need to increase for increased
image activity, but in this case cannot, frame rate and image quality are affect
ed 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 can 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 modifier #b in the field.
MJPEG
Sometimes the image size is large due to low light or complex scenery. Adjusting the maximum frame size helps to control the
bandwidth and storage used by the Motion JPEG video stream i n these situations. Setting the frame size to the Default setting
provides consistently good image q
uality at the expense of increased bandwidth and storage usage in low light. Limiting the frame
size optimizes bandwidth and storage usage, 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
Astreamprofile is a set of pre-configured stream settings including resolution, compression, frame rate and overlay settings.
Stream profiles can be used:
• When setting up recording using action rules, see Events, on page 33.
• When setting up a continuous recording, see Continuous Recording, on page 37.
• In the Live View page – select the stream profile from the Video tab.
Four pre-programmed stream profiles are available for quick set up. Each pre-programmed profile has a descriptive name, indicating
its purpose. If required, the pre-programmed stream profiles can be modified and new customized stream profiles can be created.
To create a new profile or modify an existing profile, go to Setup > Video & Audio > Stream Profiles.
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