Stream Profiles - Axis Q7401 User Manual

Current Audio Settings:
Configuration under Video & Audio > Audio Settings will be shown here. See Audio Settings, on page 16 for more
information on the audio settings.
H.264
GOV Settings
The GOV structure describes the composition of the video stream and setting the GOV-length to a higher value saves
considerably on bandwidth.
Bit Rate Control
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 bandwidth for increased activity in the image, and less
for lower activity in the monitored area.
When using CBR you can set a fixed Target bit rate, which will ensure that the level of bandwidth consumed is predictable.
Priority - As the bit rate would usually need to increase for increased image activity, but cannot when CBR is selected, the
frame rate and image quality will both be affected negatively. To go some of the way towards compensating for this, it is
possible to prioritize either the frame rate or the image quality whenever the bit rate would normally need to be increased.
Not setting a priority means the frame rate and image quality will be affected approximately equally.
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. Defining the frame size as Unlimited
provides consistently good image quality at the expense of increased bandwidth and storage usage during 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.

Stream Profiles

There are 4 pre-programmed stream profiles available for quick set-up. These settings can be adjusted and new customized
profiles can be created. Each profile has a descriptive name, describing its usage and/or purpose. The profiles can be accessed
from the Live View page.
• To add a new stream profile, click Add to bring up the Stream Profile Settings panel.
• Choose a descriptive name and enter a description for your profile.
Choose the form of Video encoding you wish to use from the drop-down list:
•
H.264 - Also known as MPEG-4 Part 10. This is the new generation compression standard for digital video. This function
offers higher video resolution than Motion JPEG or MPEG-4 at the same bit rate and bandwidth, or the same quality
video at a lower bit rate.
Motion JPEG - Delivers a high quality video stream, from which individual images can be extracted and saved.
• Copy an existing stream profile to your system and rename the copy
Modify an existing stream profile based on the light situation and motion to be captured by your video encoder. See
•
Stream Profile Settings for more information.
Highlight the stream profile you wish to remove, then click Remove to remove it from the list.
•
AXIS Q7401 - Video & Audio settings
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