User`s manual

AXIS P7214 Video Encoder
Media Streams
Media Streams
The Axis product provides several audio and video stream formats. Your requirements and the properties of your network will
determine the type you use.
The Live View page in the product provides access to H .264 and Motion JPEG video streams, audio streamsandtothelistofavailable
stream profiles. Other applications and clients can access video and audio streams directly, without going via the Live View page.
How to Stream H.264
The video com pression standard H.264 makes good use of bandwidth, and can p rovide high quality video streams at less than 1 Mbit/s.
Deciding which combination of protocols and method s to use depend s on your viewing requirements, and 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 simple to configure
firewallstoallowRTSPtraffic.
RTP over RTSP over H TTP
This unicast method can be used to traverse
firewalls. Firewalls are commonly configured to
allow the H TTP 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 live multicast video. The video stream is always
up-to-date, even if some images are d ropped.
Multicasting provides the m os 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 mul ticast over the Internet, for example.
Note a lso that all multicast viewers count as one unicast viewer in the maximum total of 20
simultaneous connections.
AXIS Media Control negotiates with the Axis product to determine the transpo rt protocol to use. The order of priority, listed in the
AMC Control Panel, can be changed and the options disabled, to s uit specific requirements.
Note
H.264 is licensed technology. The Axis product includes one H.264 viewing client license. Installing add itional unlicensed
copies of the client is prohibited. To
purchase additional licenses, contac t your Axis re se lle r.
MJPEG
This format uses standard 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 o f 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 W indow s is the recom m ended method of accessing live video from the Axis product.
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