Bedienungsanleitung Axis P3346 (Seite 12 von 68) (Englisch)

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AXIS P33 Series - Video Streams

Video Streams

The network camera provides several image and video stream formats. Your requirements and the properties of your network

will determine the type you use.

The Live View page in the network camera provides access to H.264, and Motion JPEG video streams, and to the list of

available stream profiles. Other applications and clients can also access these video streams/images directly, without going via

the Live View page.

How to stream H.264

This video compression standard makes good use of bandwidth, and can provide high quality video streams at less than 1

Mbit/s.

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

your network. The available options in AMC are:

AMC negotiates with the camera to determine the transport protocol to use in the order listed above. This order can be

changed and the options disabled, to suit specific requirements.

Important!

H.264 is a licensed technology. The network camera includes one viewing client license for each technology. Installing

additional unlicensed copies of the viewing client is prohibited. To purchase additional licenses, contact your Axis

reseller.

Motion JPEG

This format uses standard JPEG still images 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 every

image contained in the stream. The recommended method of accessing Motion JPEG live video from the network camera is to

use the AXIS Media Control in Internet Explorer in Windows.

Unicast RTP This unicast method (RTP over UDP) should

be your first consideration for live unicast

video, especially when it is important to

always have an up-to-date video stream,

even if some images are dropped.

Unicasting is used for video streaming, so that there is

no video traffic on the network until a client connects

and requests the stream.

Note that there are a maximum of 20 simultaneous

unicast connections.

RTP over RTSP This unicast method (RTP tunneled over

RTSP) is useful as it is relatively simple to

configure firewalls to allow RTSP traffic.

RTP over RTSP over

HTTP

This unicast method can be used to traverse

firewalls. Firewalls are commonly configured

to allow the HTTP protocol, thus allowing

RTP to be tunneled.

Multicast RTP This method (RTP over UDP) should be used for live multicast video. The video stream is always

up-to-date, even if some images are dropped.

Multicasting provides the most efficient usage of bandwidth when there are large numbers of cli-

ents viewing simultaneously. A multicast broadcast cannot however, pass a network router unless

the router is configured to allow this. It is not possible to multicast over the Internet, for example.

Note also that all multicast viewers count as one unicast viewer.

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