Video; Video Stream - Axis M7010 User Manual

AXIS M7010

Video

Video
It is possible to configure the following video features in your Axis product:
• Video stream. See
• Stream profiles. See
• Camera settings. See
• Overlay image. See

Video Stream

You can define the following video stream settings from Video > Video Stream:
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• Image. See
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• H.264. See
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• MJPEG. See
Note
Video stream can be configured for each channel including quad stream.
Image
The default image settings can be configured under Video> Video Stream. Select the Image tab.
The following 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.
Rotate image. If required, the image can be rotated.
•
Maximum frame rate. To avoid bandwidth problems, the frame rate allowed to each viewer can be limited.
•
• Overlay settings. See
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 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
fixed 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.
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Overlay, on page 16
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