Video Streams; Video Stream Types - Axis 210A User Manual

AXIS 210A/211A - Video Streams
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Video Streams

The AXIS 210A/211A provides several different image and video formats. You choose the
type depending on your requirements and the properties of your network.
The Live View page in the AXIS 210A/211A provides access to Motion JPEG and MPEG-4
video streams, and to single JPEG images. Other applications and clients can also access
these video streams/images directly, without going via the Live View page.

Video Stream Types

Motion JPEG
This format uses standard JPEG still images in the video stream. These images are then
displayed and updated to create a stream that shows constantly updated motion.
The Motion JPEG stream uses considerable amounts of bandwidth, but also provides
excellent image quality and access to every individual image contained in the stream.
Note also that multiple clients accessing Motion JPEG streams can use different image
settings.
MPEG-4
This is a video compression standard that makes good use of bandwidth, and which can
provide high-quality video streams at less than 1 Mbit/s.
The MPEG-4 standard provides scope for a large range of different coding tools for use by
various applications in different situations, and the AXIS 210A/211A provides certain
subsets of these tools. These are represented as Video object types, which are selected for
use with different viewing clients. The supported video object types are:
• Simple - sets the coding type to H.263, as used by QuickTime™.
• Advanced Simple - sets the coding type to MPEG-4 Part 2, as used by AMC
(AXIS Media Control).
When using MPEG-4 it is also possible to control the bit rate, which in turn allows control
of bandwidth usage. CBR (Constant Bit Rate) is used to achieve a specific bit rate by
varying the quality of the MPEG-4 stream. When using VBR (Variable Bit Rate), the quality
of the video stream is kept as constant as possible, at the cost of a varying bit rate.
Notes:
MPEG-4 is licensed technology. The AXIS 210A/211A includes one viewing client license. Installing addi-
tional unlicensed copies of the viewing client is prohibited. To purchase additional licenses, contact your
Axis reseller.
All clients viewing the MPEG-4 stream must use the same set of coding tools.