Axis Communications 212 PTZ 212 PTZ/-V - User's Manual - Page 12
Video Streams, How to stream MPEG-4
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AXIS 212 PTZ/-V - Video Streams Video Streams AXIS 212 PTZ/-V provides several different image and video stream formats. The type to use depends on your requirements and on the properties of your network. 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 their own stream. Multicast is bandwidth-conserving technology that reduces bandwidth usage by simultaneously delivering a single stream of information to multiple network users. The Live View page in AXIS 212 PTZ/-V provides access to Motion JPEG and MPEG-4 video streams, as well as 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 Deciding on the combination of protocols and methods to use depends on your viewing requirements, and on the properties of your network. Unicast RTP RTP over RTSP RTP over RTSP over HTTP Multicast RTP This unicast method (RTP over UDP) should be Unicasting is used for video streaming, so that your first consideration for live unicast video, there is no video traffic on the network until a especially when it is important to always have client connects and requests the stream. an up-to-date video stream, even if some Note that there are a maximum of 20 simultane- images are dropped. ous unicast connections. This unicast method (RTP tunneled over RTSP) is useful as it is relatively simple to configure firewalls to allow RTSP traffic. This unicast method can be used to traverse firewalls. Firewalls are commonly configured to allow the HTTP protocol, thus allowing RTP to be tunneled. 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 dropped. Multicasting provides the most efficient usage of bandwidth when there are large numbers of clients 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 simultaneous connections. AXIS Media Control (AMC) The recommended method of accessing live video (MPEG-4 and Motion JPEG) from AXIS 212 PTZ/-V is to use AXIS Media Control (AMC) in Microsoft Internet Explorer in Windows. The AMC control panel can be used to configure various video and audio settings. Please see the readme file included in the tool for more information. The AMC control panel is automatically installed on first use, after which it can be configured. Open the AMC Control Panel from: • Windows Control Panel (from the Start menu) • Alternatively, right-click the video image and click Settings in the menu. 12