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AXIS P3354
Media Streams
Media Streams
The Axis product provides several vide o stream forma ts. Your requirements and the properties of your ne tw o rk will determine the
type you use.
The Live View page in the product provides access to H .264 and Motion JPEG video stream s, and to the list of available stream profiles.
Other applications and clients can access video streams directly, without going via the Live View page.
How to Stream H.264
The video com pression standard H.264 makes good use o f 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 netw ork. The available options in AXIS Media Control are:
Unicast RTP
This unicast method (RTP over UDP) is used
for live uni cast video, especially wh en it is
important to always have an up-to-date video
stream, even if some images are dropped.
RTP over RTSP
This unicast method (RTP tunneled over RTSP)
is useful as it is re la tively simple to co n figure
firewallstoallowRTSPtraffic.
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.
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 maximum of 20
simultaneous unicast connections.
Multicast RTP
This method (RTP o ver UDP) should be used for l iv e 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
clients viewing simultaneously. A multicast cannot however, pass a network router unless the
router is configured to allow this. It is not possible to mul ticast over the Internet, for example.
Note also that all m ultica st viewers count a s one unicast viewer in the maximum total of 20
simultaneous connections.
AXIS Media Control negotiates with the Axis pr oduct to determine the transport protocol to use. The order of priority, listed in the
AMC Con trol Panel, can be changed and the optio ns disabled, to suit specific requirements.
Note
H.264 is licensed technology. The Axis product includes one H.264 viewing clie nt license. Install ing additional unlicen se d
copies of the c lient is prohibited. To
purchase additional lice n ses, conta c t your Axis reseller.
MJPEG
This format uses standard JPEG still ima g es for the video s tream. These images are then displayedandupdatedataratesufficient
to create a stream that shows constantly updated motion.
The Motion JPEG s tream uses considerable amounts of b andw idth, but provides excellent image qualityandaccesstoeveryimage
contained in the stream. The recommended method of accessing Motion JPEG live video from the Axis product is to use the AXIS
Media Control in Internet Explorer in W ind ow s.
AXIS Media Control (AMC)
AXIS Media C ontrol (AMC) in Internet Explorer in Windows is the recomme nded method of accessing live video from the Axis p roduct.
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