User`s manual

AXIS 282/AXIS 282A - Video and Audio Streams

How to stream MPEG-4

Deciding on the combination of protocols and methods to use depends on your viewing

requirements, and on the properties of your network. Setting the preferred method(s) is

done in the control applet for AMC, which is found in the Windows Control Panel. When

this has been set, AMC will test all the selected methods in the specified order, until the

first functioning one is found.

RTP+RTSP

This method (actually RTP over UDP and RTSP over TCP) should be your first consideration

for live video, especially when

it is important to always have an up-to-date video stream,

even if some images get dropped. This can be configured as multicast or unicast.

Multicasting provides the most effic

ient usage of bandwidth, especially when there are

large numbers of clients viewing simultaneously. Note however, that a multicast broadcast

cannot pass a network router unless the router is configured to allow this. It is thus not

possible to multicast over the Internet, for example.

Unicasting should be used for video-on-demand b

roadcasting, so that there is no video

traffic on the network until a client connects and requests the stream. However, if more

and more unicast clients connect simultaneously, the server will at some point become

overloaded. There is also a maximum of 20 simultaneous viewers to be considered.

RTP/RTSP

This unicast method is RTP tunneled over RTSP. This can be us

ed to exploit the fact that it

is relatively simple to configure firewalls to allow RTSP traffic.

RTP/RTSP/HTTP or RTP/RTSP/HTTPS

These two methods can also be used to traverse firewall

s. Firewalls are commonly

configured to allow the HTTP protocol, thus allowing RTP to be tunneled.

The AXIS Media Control

The recommended method of accessing live video and audio from the AXIS 282/AXIS

282A is to use the AXIS Media Control (AMC) in Microsoft Internet Explorer in Windows.

This ActiveX component is automatically installed on first use, after which it can be

configured by opening the AMC Control Panel applet from the Windows Control Panel.

Alternatively, right-click the video image in Internet Explorer.