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AXIS P3364–VE
Video and Audio
Setting the compression level affects the image quality and bandwidth; the lower the compression , the higher the image quality
with higher bandw idth requirements.
To avoid ba n dwi dth proble m s on the network, you can limit the frame rate allowed to each viewe r. The maximum fra m e rate ca n be
set to Unlimited, or you can limit the frame rate to a value.
An image or text can be superimposed over the image as overlay. See
Overlay, on page 20
.
Save your settings befo re 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 v ideo streams at low bit rates.
An H.264 video stream consists of different types of frames such as I-frames and P-fr am e s. An I-frame is a c om ple te image whe re as
P-frames only contain the differences from previous frames.
The GOV length is the number of fram es between two consecutive I-frames. Increasing the GOV length may save considerably o n
bandwidth requirements in some cases, but may also have an adverse affect on image quality.
The Axis product supports two H.264 profiles.TheMainprofile provides higher compression than the Baseline pro file with the same
video quality, but requires mor e processing power to decode.
ThebitratecanbesetasVa riable 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 a ctivity, but in this case cannot, frame rate and image qualityareaffectednegatively. Topartly compensate for this, it is
possible to prioritize either fra m e rate or im age quality. Not setting a priority means that fram e r ate and image quality are equally
affected. Yo u must sa ve you r setting s before they can take effec t .
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 com ple x scenery. Adjusting the maximum frame s ize 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 quality at the expense of increased ba
ndwidth and storage usage in low light. Limiting the frame
size optimizes bandwidth and storage usag e, but may give poor image quality. To prevent increased bandwidth and storage usage,
the ma ximum f rame 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 use d:
• When setting up recording using action rules, see
Events, on page 32
.
• When setting up a c ontinuous recording, see
Continuous Recording, on page 36
.
• In the Live View page — select the stream profile fro m the Stream profile dro p-dow n list.
Four pre-programmed stream profiles are availab le for quick s e t up. Each p re-progr am m e d profile ha s a descriptive name, indicating
its purpose. If required, the pre-programmed stream profiles can be modified and new customi zed stre am profiles can be created.
To create a new profile or modify an existing pro file, go to Setup > Video & Audio > Stream Profiles.
To select a default st re am profile for the Live View page, g o to Setup > Live View Config.
Camera Settings
The Video & Audio > Camera Settings p age pro vides access to advanced image settings for the Axis product.
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