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AXIS P3364–V
Video and Audio
Setting the compression level affects the image quality and bandwidth; the low er the compression, 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 frame rate can be
set to Unlimited, or you can lim it 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 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 q uality 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 com ple t e image where as
P-frames only contain the differences from pr evious frames.
The GOV length is the number o f frames between two consecutive I-frames. Increasing the GOV length may save considerably on
bandwidth requirements in some cases, but may also have an adve rse affect on image quality.
The Axis pro duct supports two H.264 profiles.TheMainprofile provides higher compression than the Baseline pro file with the same
video quality, but requires more processing power to decode.
ThebitratecanbesetasVa riable Bit Rate (VBR) or Constant Bit Rate (CBR). VB R 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 wo uld usually need to incre as e for increased
image activity, 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 save your settings before they c an 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 modifier#b in the field.
MJPEG
Sometimes the image size is large due to low light or complex scene ry. Adjusting the ma xim um frame size helps to control the
bandwidth and storage used by the Motio n JPE G video stream in 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 fr ame
size optimizes bandwidth and storage usage, but may give poor image quality. To prevent increased bandwidth and storage usage,
the ma ximum fram e size should be set to an optimal value.
Stream Profiles
Astreamprofile is a set of pr e-con figured stream settings i ncluding resolution, compression, frame rate and overlay settings.
Stream profiles can b e 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 from the Stream profile drop-dow n list.
Four pre-programmed stream profi l es are availab le for quick set up. Each pre-progr am m e d profile has a des criptive nam e, indicating
its purpose. If required, the pre-programmed s tream profiles can be modified and new customized stream 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 stre am profile for the Live View page, go to Setup > Live View Config.
Camera Settings
The Video & Audio > Camera Settings page provides access to advanced image settings for the Axis product.
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