AXIS P7210 Video Encoder
Video and Audio
An image or text can be superimposed over the image as overlay. See
.
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 contain 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.
The bit rate can be set as
Variable 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
fi
xed
Target 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 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 code
#b
in the
fi
eld.
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 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 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.
Quad stream
A Quad view displays images from all four channels on a single screen; where the images from each camera take up a quarter of
the display area. It is possible to de
fi
ne settings for the video stream in quad view.
Stream Pro
fi
les
There are four pre-programmed stream pro
fi
les available for quick set up. The settings for these can be adjusted. New customized
pro
fi
les can also be created. Each pro
fi
le has a descriptive name, indicating its purpose.
• The stream pro
fi
les can be accessed from the
Stream pro
fi
le
drop-down list in the Live View page.
• To add, copy, modify, and remove stream pro
fi
les go to
Video & Audio
>
Stream Pro
fi
les
.
• To select the default stream pro
fi
le go to
Live View Con
fi
g
>
Stream Pro
fi
le
and choose the pro
fi
le 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
The image
Brightness
can be adjusted in the range 0–100, where a higher value produces a brighter image.
The
Contrast
can be adjusted using the slidebar.
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