Axis Communications AXIS 241SA General performance considerations, Optimizing your system

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AXIS 241QA/AXIS 241SA - Technical specifications 69

General performance considerations

When setting up your system, it is important to consider how various settings and situations will affect performance. Some factors affect the amount of bandwidth (the bit rate) required, others can affect the frame rate, and some will affect both. If the load on the CPU reaches its maximum, this will also affect the frame rate.

The following factors are among the most important to consider:

High image resolutions and/or lower compression levels result in larger images. Bandwidth affected.

Access by large numbers of Motion JPEG and/or unicast MPEG-4 clients. Band- width affected.

Simultaneous viewing of different streams (resolution, compression, etc.) by dif- ferent clients. Frame rate and bandwidth affected.

Accessing both Motion JPEG and MPEG-4 video streams simultaneously. Frame rate and bandwidth affected.

Heavy usage of event settings affects the CPU load. Frame rate affected.

Enabled motion detection. Frame rate and bandwidth affected.

Heavy network utilization due to poor infrastructure. Bandwidth affected

Viewing on poorly performing client PC lowers perceived performance. Frame rate affected.

Access by large number of audio clients using full-duplex mode. Bandwidth affected.

Optimizing your system

To see the bandwidth and frame rate currently required by the video stream, the AXIS 241QA/AXIS 241SA provides a tool that can be used to display these values directly in the video image.

To do this, special format strings are added as part of a text overlay. Simply add #r (average frame rate in fps) and/or #b (average bandwidth in Kbps) to the overlay.

For detailed instructions, please see the online help for Video & Image > Overlay Settings, and the help for File Naming & Date/Time Formats.

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Contents User’s Manual About This Document Table of contents Axis video server Overview of the Axis video server Product descriptionFront panel Axis 241QA LED indicatorsNetwork StatusSwitches & 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 Video stream types Video and audio streamsMotion Jpeg MPEG-4How to stream MPEG-4 MPEG-4 protocols and communication methodsAxis Media Control AMC RTP+RTSP Other methods of accessing the video streamRTP/RTSP RTP/RTSP/HTTP or RTP/RTSP/HTTPSAccessing 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 settings Quad stream settingsMjpeg Overlay/Mask typeOverlay image requirements Upload and use an overlay imageOverlay image limitations Image Formats Image SizeUse a Privacy Mask Enable Audio Audio SettingsAudio Audio ChannelsAudio 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 defaultDefault Video Format Default Live View VideoDefault Viewer Viewer SettingsHtml 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 configurationEvent types How to set up a triggered eventTriggered Event Click Add triggered on the Event typesPre-trigger and post-trigger buffers How to set up a scheduled eventScheduled event Click Add scheduled on the Event typesCamera tampering SettingsMotion detection How to configure Motion DetectionObject Size Port statusSecurity System optionsUsers IP Address FilterHttps Stream, IP address filtering must be enabledAxis 241QA/AXIS 241SA System options Date & time RadiusCA servers Network Basic TCP/IP settings IP Address ConfigurationServices DNS configuration Network Advanced TCP/IP settingsNTP Configuration Host Name ConfigurationHttp FTPRtsp Socks QoS SettingsQoS Smtp emailRTP / 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 No images displayed in the Web interface Video Image ProblemsSnapshot images Only I framesAudio Advanced Settings Audio volume too low/highAudio Axis 241QA only Poor audio qualityModels 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 Action IndexHttp API Http API requests Http port number Http serverRTP 14 Rtsp 14 Video streams 13, 15