Axis P5534-E Manuel d'utilisateur télécharger pdf (Page 11)

AXIS P5532-E/P5534-E - 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 which combination of protocols and methods to use depends

on your viewing requirements, and on the properties of

your network. The available options in Axis Media Control are:

Axis Media Control negotiates with the camera

to determine the transport protocol to use. The order of priority, listed in the

AMC Control Panel, can be changed and the options disabled, to suit specific requirements.

Important!

H.2

64 is licensed technology. The network camera includes one H.264 viewing client license. 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 (AMC) in Internet Explorer in Windows.

Unicast RTP This unicast method (RTP over UDP) is used

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-on-demand transmission,

so that there is no video traffic on the network until a

client connects and requests the stream.

Note that there are a maxim

um 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 in the maximum total of 20

simultaneous connections.

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Axis P5534-E Manuel d'utilisateur Page 11

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