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AXIS M1143–L
Media Streams
Media Streams
The Axis product provides severa l vide o stream formats. Your re quirements and the properties of your ne tw ork will determine the
type you use.
The Li ve View page in the product provides access to H.264 and Motion JPEG video streams, and to the list of available stream profiles.
Other applications and clients can access video streams directly, without going via the Live View p age.
How to Stream H.264
The video compression standard H .264 makes good use of bandwidth, and can provide high quality video streams at less than 1 Mbit/s.
Deciding which combination of protocols and method s to use depends on your viewing requirements, a nd on the properties of
your network. The available options in AXIS Media Control are:
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.
RTP over RTSP
This unicast method (RTP tunneled over RTSP)
is useful as it is relatively s im ple to configure
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 over UDP) should be used for liv e m ulticast video. The v ideo stream is always
up-to-date, even if some images are dropped.
Multicasting provides the mos t 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 multicast over the Internet, for example.
Note a lso that all multicast viewers count as one unicast viewer in the m aximum total of 20
simultaneous connections.
AXIS Media Control negotiates with the Axis product to determine the transport protocol to use. The order of priority, listed in the
AMC Control 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 licens e. Installing ad ditional unlicensed
copies of the client is prohibited. To
purchase additional licen se s, contac t your Axis reseller.
MJPEG
This format uses st anda rd JPEG still images for the video stream. These images are then displayedandupdatedataratesufficient
to create a stream that shows constantly updated motion.
The Motion JPEG stream uses considerable amounts of bandwidth, but provides excellent image qualityandaccesstoeveryimage
contained in the stream. The recommended method of accessing Motion JPEG live v id eo from the Axis product is to use the AXIS
Media C ontrol in Internet Explorer in Windows.
AXIS Media Control (AMC)
AXIS Media Control (AMC) in Internet Explorer in Windows is the recommended method of accessing live video from the Axis p roduct.
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