Axis Communications AXIS 241SA Other methods of accessing the video stream, Rtp+Rtsp, Rtp/Rtsp

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AXIS 241QA/AXIS 241SA - Video and audio streams 15

RTP+RTSP

This method (actually RTP over UDP and RTSP over TCP) should be your first consideration for live video, especially when it is important to always have an up-to-date video stream, even if some images do get dropped. This can be configured as multicast or unicast.

Multicasting provides the most efficient usage of bandwidth, especially when there are large numbers of clients viewing simultaneously. Note however, that a multicast broadcast cannot pass a network router unless the router is configured to allow this. It is thus not possible to multicast over the Internet, for example.

Unicasting should be used for video-on-demand broadcasting, so that there is no video traffic on the network until a client connects and requests the stream. However, if more and more unicast clients connect, the server will at some point become overloaded. There is also a maximum of 20 simultaneous viewers to be considered.

RTP/RTSP

This unicast method is RTP tunneled over RTSP. This can be used to exploit the fact that it is relatively simple to configure firewalls to allow RTSP traffic.

RTP/RTSP/HTTP or RTP/RTSP/HTTPS

These two methods can also be used to traverse firewalls. Firewalls are commonly configured to allow the HTTP protocol, thus allowing RTP to be tunneled.

Other methods of accessing the video stream

Video/images from the AXIS 241QA/AXIS 241SA can also be accessed in the following ways:

•If supported by the client, the AXIS 241QA/AXIS 241SA can use Motion JPEG server push to display video. This option maintains an open HTTP connection to the web browser and sends data as and when required, for as long as required.

•As single JPEG images in a browser. Enter the path: http://<ip>/axis-cgi/jpg/image.cgi?resolution=CIF

•Windows Media Player. This requires AMC and the MPEG-4 decoder to be installed. The paths that can be used are listed below, in the order of preference.

•Unicast via RTP: axrtpu://<ip>/mpeg4/#/media.amp

•Unicast via RTSP: axrtsp://<ip>/mpeg4/#/media.amp

•Unicast via RTSP, tunneled via HTTP: axrtsphttp://<ip>/mpeg4/#/media.amp

•Unicast via RTSP, tunneled via HTTPS: axrtsphttps://<ip>/mpeg4/#/media.amp

•Multicast: axrtpm://<ip>/mpeg4/#/media.amp

Notes:

•

<ip> = IP address.

 

•

# = video source number or the quad stream. This is set to 1 if omitted.

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Contents User’s Manual About This Document Table of contents Axis video server Overview of the Axis video server Product descriptionStatus LED indicatorsFront panel Axis 241QA NetworkSwitches & connectors PowerRear panel Axis 241QA/AXIS 241SA Product description Accessing the video server Using the video serverPlease see the online help for more information Setting the root passwordLive View AMC Audio controls MPEG-4 Video and audio streamsVideo stream types Motion JpegHow to stream MPEG-4 MPEG-4 protocols and communication methodsAxis Media Control AMC RTP/RTSP/HTTP or RTP/RTSP/HTTPS Other methods of accessing the video streamRTP+RTSP RTP/RTSPAccessing the audio streams Other MPEG-4 clientsAxis Vapix API Accessing the Setup tools Configuring the video serverVideo & image settings Image settingsImage appearance Advanced Video source settingsOverlay/Mask type Quad stream settingsOverlay/Mask settings MjpegImage Formats Image Size Upload and use an overlay imageOverlay image requirements Overlay image limitationsUse a Privacy Mask Audio Channels Audio SettingsEnable Audio AudioAudio Input Advanced Audio Settings Noise canceller threshold value Noise canceller attenuationAudio Output Axis 241QA/AXIS 241SA Audio Layout Live View ConfigUpload Own Web Files Customizing the defaultViewer Settings Default Live View VideoDefault Video Format Default ViewerHtml Examples User-defined LinksCheck Show Custom Link External Video Sequence ModePan Tilt Zoom Installing PTZ devicesPreset positions PTZ configurationPTZ controls Using CGI links to control PTZ devices PTZ control modesControl panel Preset positions Guard tourAdvanced PTZ control queue Axis 241QA/AXIS 241SA Pan Tilt Zoom Event servers Event configurationClick Add triggered on the Event types How to set up a triggered eventEvent types Triggered EventClick Add scheduled on the Event types How to set up a scheduled eventPre-trigger and post-trigger buffers Scheduled eventCamera tampering SettingsMotion detection How to configure Motion DetectionObject Size Port statusIP Address Filter System optionsSecurity UsersHttps Stream, IP address filtering must be enabledAxis 241QA/AXIS 241SA System options Date & time RadiusCA servers Network Basic TCP/IP settings IP Address ConfigurationServices Host Name Configuration Network Advanced TCP/IP settingsDNS configuration NTP ConfigurationHttp FTPRtsp Smtp email QoS SettingsSocks QoSRTP / MPEG-4 SnmpMaintenance Ports & devicesSupport Configuration Using the Control Button Resetting to the factory default settingsUnit connectors D-Sub connectorPin Pin Function Description I/O terminal connectorCOM ports RS-232 and RS-485 Schematic diagram I/O terminal connectorAxis 241QA/AXIS 241SA Unit connectors Troubleshooting Checking the firmwareUpgrading the firmware Emergency recovery procedure Be accessed from a web browser Alarms, etc, to a destination outside the local networkLit Only I frames Video Image ProblemsNo images displayed in the Web interface Snapshot imagesPoor audio quality Audio volume too low/highAudio Advanced Settings Audio Axis 241QA onlyModels Technical specificationsVideo access from Web ConnectorsApplications not Optimizing your system General performance considerationsFrame rates MPEG-4 Frame rates Motion JpegBandwidth Glossary Active Speaker a speaker with a built-in power amplifierDe-interlacing See interlacing Compression See Image CompressionFixed iris See Autoiris Encoder See Video encoderHalf-duplex See Full-duplex Megapixel See Pixel Axis 241QA/AXIS 241SA Glossary SSL/TSL Video camera See Network camera and Cctv video camera Identity of the serverAn I-VOP is a complete image frame Http API requests Http port number Http server IndexAction Http APIRTP 14 Rtsp 14 Video streams 13, 15
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