Datasheet
AXIS 212 PTZ/AXIS 212 PTZ-V - Video Streams
13
Other MPEG-4 clients
QuickTime™ & Real Player™
To access the video stream from, for example, Qu
ickTime™ or Real Player™ the following paths can be used:
• rtsp://<ip>/mpeg4/media.amp
• rtsp://<ip>/mpeg4/media.3gp
Notes:
• The AXIS 212 PTZ/AXIS 212 PTZ-V supports QuickTime 6.5.1 (or later) and Real Player 10.5 (or later)
• QuickTime adds latency to the video and audio stream (up to 3 seconds)
• It may be possible to use other players to view the MPEG-4 stream using the paths above, although this is not guaranteed by Axis
• <ip> = IP address
MPEG-4 protocols and communication methods
To deliver live streaming video over IP networks, various combinations of transport protocols and broadcast
methods are employed.
• RTP (Realtime Transport Protocol) is a protoco
l that allows programs to manage the real-time transmission of
multimedia data, via unicast or multicast.
• RTSP (Real Time Streaming Protocol) serves as a
control protocol, to negotiate which transport protocol to
use for the stream. RTSP is thus used by a viewing client to start a unicast session, see below.
• UDP (User Datagram Protocol) is a communications protocol
that offers limited service for exchanging data
in a network that uses the Internet Protocol (IP). UDP is an alternative to the Transmission Control Protocol
(TCP). The advantage of UDP is that it is not required to deliver all data and may drop network packets when
there is for example, network congestion. This is suitable for live video, as there is no point in re-transmitting
old information that will not be displayed anyway.
• Unicasting is communication between a s
ingle sender and a single receiver over a network. This means that
the video stream goes independently to each user, and each user gets their own stream. A benefit of unicast-
ing is that if one stream fails, it onl
y affects one user.
• Multicast is bandwidth-conserving technology that reduces bandwidth usage by
simultaneously delivering a
single stream of information to multiple network recipients. This technology is used primarily on delimited
networks (intranets), as each user needs an uninterrupted data flow and should not rely on network routers.
Stream Types
Motion JPEG
This format uses standard JPEG still i
mages for 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 provides excellent image quality and
access to each and every individual image contained in the stream. The recommended method of accessing
Motion JPEG live video from the AXIS 212 PTZ/AXIS 212 PTZ-V is to use the AXIS Media Control (AMC) in
Microsoft Internet Explorer in Windows.
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.
Note:
All clients viewing the MPEG-4 stream must use the same image settings.