Axis Communications AXIS 211W user manual Video Stream, How to stream MPEG-4

AXIS 211W - Video Stream

Video Stream

The AXIS 211W provides several different image and video stream formats. The type to use depends on your requirements and on the properties of your network.

The Live View page in the AXIS 211W provides access to MPEG-4 and Motion JPEG video streams, as well as single JPEG images. Other applications and clients can also access these video streams/images directly, without going via the Live View page.

How to stream MPEG-4

This video compression standard makes good use of bandwidth, and can provide DVD-quality video streams at less than 1 Mbit/s. Note that the image settings of the MPEG-4 stream are the same for all clients.

Deciding on 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:

Unicast RTP	This unicast method (RTP over UDP) should be your
	first consideration for live video when using Unicast,
	especially when it is important to always have an
	up-to-date video stream, even if some images are	Unicasting is used for video-on-demand
	dropped.
		broadcasting, so that there is no video traf-
		fic on the network until a client connects
RTP over RTSP	This unicast method (RTP tunneled over RTSP) is use-
		and requests the stream.
	ful as it is relatively simple to configure firewalls to
		Note: There is a maximum of 20 simulta-
	allow RTSP traffic.
		neous viewers.
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 multicast method (RTP over UDP) should be your	Multicasting provides the most efficient
	first consideration for live video when using Multicast,	usage of bandwidth, especially when there
	especially when it is important to always have an	are large numbers of clients viewing simul-
	up-to-date video stream, even if some images are	taneously. Note however, that a multicast
	dropped.	broadcast cannot pass a network router
		unless the router is configured to allow this.
		It is thus not possible to multicast over, e.g.
		the Internet.

AMC will negotiate with the camera to determine exactly which transport protocol to use in the order listed above. This order can be changed and the options disabled, to suit any specific requirements.

Important!

MPEG-4 is licensed technology. The AXIS 211W includes one viewing client license. Installing additional unlicensed copies of the viewing client is prohibited. To purchase additional licenses, contact your Axis reseller.

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