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16
AXIS P33 Series - Video & Audio
Audio
Enable Audio
Check the Enable audio box option to enable the audio functionality.
Note: Audio support must be also enabled under System Options > Security
The settings defined under Audio Settings are displayed under Current Audio Settings.
H.264
GOV Settings
The GOV structure describes the composition of the video stream; setting the GOV-length to a higher value saves considerably
on bandwidth but may have an adverse effect on image quality.
Bit Rate Control
The bit rate can be set as Variable bit rate (VBR) or Constant bit rate (CBR). VBR adjusts the bit rate according to image
complexity, and thus uses a lot of bandwidth for a lot of activity in the image, and less when the monitored area is quiet.
When using CBR you can set a fixed Target bit rate, which will ensure that the level of bandwidth consumed is predictable.
As the bit rate would usually need to increase for increased image activity, but cannot when CBR is selected, the frame rate
and image quality will both be affected negatively. To go some of the way towards compensating for this, it is possible to
prioritize either the frame rate or the image quality whenever the bit rate would normally need to be increased. Not setting a
Priority means the frame rate and image quality will be affected approximately equally.
MJPEG
Frame Size Control
In some situations the image size may be large due to low light or complex scenery. Adjusting the maximum frame size is a
way of controlling the bandwidth and storage used by the MJPEG video stream in these situations. Leaving the frame size as
Unlimited will provide consistently good image quality at the expense of increased bandwidth and storage usage during low
light. Limiting the frame size will prevent excessive bandwidth and storage usage, but image quality will suffer. To prevent
increase in bandwidth and storage usage, the maximum frame size should be set to an optimal amount.
Note: The maximum frame size allowed increases compression in order to maintain a low frame size starting at the com-
pression value set under Image settings > Image Appearance > Compression. When compression is 100, the image cannot be
made smaller. You may also need to adjust the Resolution setting if a smaller frame size is needed.
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