User`s manual

14
AXIS 216FD/FD-V/MFD/MFD-V - 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 MPEG-4 and Motion JPEG
video streams, and to 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 high
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 which combination of protocols and methods to use dep
ends on your viewing
requirements, and on the properties of your network. The available options in AMC are:
AMC negotiates with the camera to
determine the transport protocol to use in the order
listed above. This order can be changed and the options disabled, to suit specific
requirements.
Important!
MPEG-4 is licensed technology. The network ca
mera includes one viewing client
license. Installing additional unlicensed copies of the viewing client is prohibited. To
purchase additional licenses, contact your Axis reseller.
Unicast RTP This unicast method (RTP over UDP)
should be your first consideration 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 vid
eo-on-demand broadcasting,
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
un
icast 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 firew
alls. Firewalls are com-
monly configured to allow the HTTP pro-
tocol, thus allowing RTP to be tunneled.
Multicast RTP This method (RTP over UDP) should be used for live mult
icast 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 10 simul-
taneous connections.