Axis M7014 - Video; Video Stream settings; Image adjustments; H.264 video compression

AXIS M7014
Video
Video
It is possible to configure the following video features in your Axis product:
• Video stream. See page 15.
•Streamprofiles. See page 16.
• Camera settings. See page 16.
• Overlay image. See page 17.
Video Stream
You can define the following video stream settings from Video > Video Stream:
•Image.Seepage 15.
• H.264. See page 15.
•MJPEG.Seepage 16.
Note
Video stream can be configured for each channel including quad stream .
Image
You can modify the image resolution and compression, and rotate the image from the Image tab (Video > Video Stream ). Setting
the compression level affects the image quality and bandwidth; the lower the comp
ression, 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 fra me ra te can be
set to Unlimited, or you ca n limit the frame rate to a value.
An image or text can be superimposed over the image as overlay. See Overlay, on page 17.
Save yo ur settings before they can take effect.
H.264
H.264, also known as MPEG-4 Par
t 10/A VC , is a video compression standa rd that provides high quality video streams at low bit rates.
An H.264 video stream consists of differe nt types of frames s uch 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 p revious/future frames.
The GOV length is the number of frames between two consecutive I-frames. Increasing the GOV length may save considerably o n
bandwidth requ
irements in some cases, b ut may also have an adverse affect on imag e quality.
The bit rat
ecanbesetasVariable 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 allow s 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 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 field.
15