Installation guide

8
3. Live View
Digital Zoom
Snap Shot
Full Screen
Video Stream change: First stream  Second stream
Play: Click this button by manually to start the stream
Stop: Click this button by manually to stop streaming
NOTE: It is possible that not all the buttons described below will be visible unless the Live
View page has been customized to display them.
3.1 Video Stream Types
Motion JPEG
This format uses standard JPEG images in the video stream. These images are then
displayed and updated at a rate sufficient to create a stream that shows constantly updated
motion.
The Motion JPEG stream uses a considerable amount of bandwidth, but it also provides
excellent image quality and access to every individual image contained in the stream.
H.264 protocols and communication methods
• RTP (Real-time Transport Protocol) is a protocol that allows programs to manage the real-
time transmission of multimedia data, via unicast or multicast.
• RTSP (Real Time Streaming Protocol) serves as a control protocol, to negotiate the type of
transport protocol to use for the stream. RTSP is used by a viewing client to start a unicast
session.
• UDP (User Datagram Protocol) is a communications protocol that offers limited service for
exchanging data in a network which uses the Internet Protocol (IP).
UDP is an alternative to the Transmission Control Protocol (TCP). The advantage of UDP is
that, it is not required to deliver all data and may drop network packets when there is
network congestion. This is suitable for live video, as there is no point in re-transmitting old
information that will not be displayed anyway.
• Unicasting is communication between a single sender and a single receiver over a
network. This means that the video stream goes independently to each user, and each user
gets own stream. A benefit of unicasting is, in case one stream fails, it only affects one user.