11
AXIS 213 PTZ
Video and Audio Streams
The AXIS 213 PTZ provides several different image and video formats. Your requirements and the
properties of your network determine what you use.
The Live View page in the AXIS 213 PTZ provides access to Motion JPEG and MPEG-4 video streams, as
well as to single JPEG images. Other applications and clients can also access these video and audio
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 at a rate sufficient 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 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 coding tools for various applications in different
situations, and the AXIS 213 PTZ 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 bandwidth control. 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 213 PTZ includes one viewing client license. Installing additional 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 image settings.
