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AXIS 241Q/S/QA/SA - Video and Audio Streams

Using MPEG-4

When using MPEG-4, audio is streamed using the same protocol as the video stream.

When audio is transmitted using MPEG-4, the Axis product sends synchronization

information along with the streams to the client that is performing the synchronization.

Note:

Audio is streamed from the client to the server over HTTP when using Motion JPEG and MPEG-4.

Accessing the Audio Streams

In addition to accessing audio in the Live View page using AMC, audio from the Video

Server can also be accessed in the following ways:

HTTP-API

You can read about accessing audio for the other protocols through the HTTP-API at

http://www.axis.com/techsup

QuickTime/Windows Media Player

It is possible to use QuickTime and Windows Media Player to listen to the audio stream

using the same methods to access video streams.

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Содержание 241Q Blade

Страница 1: ...AXIS 241Q AXIS 241S AXIS 241QA and AXIS 241SA Video Servers User s Manual ...

Страница 2: ...rence when operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his her own expense will be required to take whatever measures may be required to correct the interference Europe This digital equipment fulfills the requirements for radiated emission according to limit B of EN55022 1998 and the requirements f...

Страница 3: ...stream MPEG 4 15 The AXIS Media Control 15 Other methods of accessing the video stream 16 Configuring the Video Server 18 Accessing the Setup tools 18 Video Image Settings 19 Image Settings 19 Video Source Settings 20 Pan Tilt Zoom 21 Advanced MPEG 4 Settings 21 Quad Stream Settings AXIS 241Q QA only 21 Overlay Image Settings 22 Audio AXIS 241QA SA only 23 Audio Settings 23 Live View Config 27 Lay...

Страница 4: ...d 45 Resetting to the Factory Default Settings 46 Unit Connectors 47 The D Sub Connector 47 The I O Terminal Connector 48 Schematic Diagram I O Terminal Connector 49 COM Ports RS 232 and RS 485 49 Y C to BNC Cable AXIS 241S SA only 50 Troubleshooting 51 Checking the Firmware 51 Upgrading the Firmware 51 Support 52 Technical Specifications 56 General performance considerations 59 Optimizing your sy...

Страница 5: ...can be used to connect various third party devices e g door sensors and alarm bells The AXIS 241QA 241SA has a Line Mic In mono for connecting an external microphone or other source producing a line level signal An active speaker with a built in amplifier can be connected to Line Out mono to enable two way communication Audio communication can be bi directional full duplex push to talk half duplex...

Страница 6: ...nputs All units are shipped with the line termination enabled for each supported video input that is with the DIP switches set in the down position Note If the video source is to be connected in parallel with other equipment disable the input termination by turning the corresponding DIP switch to the up position OFF Failure to do so may cause reduced image quality Network Amber Flashes for activit...

Страница 7: ...r with a built in amplifier A pair of headphones can also be attached Line Mic In AXIS 241QA only One 3 5mm input for a mono microphone or for line in mono signal only the left channel is used from a stereo signal AXIS 241S SA Front Panel Indicators After completion of the startup and self test routines the multi colored Network Status Power Indicators flash as follows Network Amber Flashes for ac...

Страница 8: ...een composite video and Y C S video using an Y C to BNC cable Video Output A single video loop through VIDEO OUT connected in parallel with VIDEO IN and terminated with a coax BNC connector Allows direct connection of e g an external monitor Set DIP switch to OFF when in use Line Out AXIS 241SA only Mono audio output line level which can be connected to a public address PA system or an active spea...

Страница 9: ...The I O Terminal connector also provides an auxiliary connection point for DC power Network Connector The Video Server connects to the network via a standard network cable and automatically detects the speed of the local network segment 10BaseT 100BaseTX Ethernet RS 232 Serial Connector A 9 pin D sub connector providing an RS 232 serial connection Typically used for connecting Pan Tilt Zoom device...

Страница 10: ...h other operating systems See also the Technical Specifications on page 56 Note For information on installing the Video Server please refer to the Installation Guide Accessing the Video Server 1 Start your browser 2 Enter the IP address or host name of the Video Server in the Location Address field of your browser 3 Enter the user name and password set by the administrator 4 A video image is displ...

Страница 11: ...e information If your workstation restricts the use of additional software components the Video Server can be configured to use a Java applet for updating JPEG images Please see the online help for more information The Live View page If your Video Server has been customized to meet specific requirements the buttons and other items described below may or not be displayed on the Live View page The f...

Страница 12: ...dia Control which is available from the Windows Control Panel Internet Explorer only Click the View Full Screen button and the video image will fill the entire screen area No other windows will be visible Press Esc Escape on your keyboard to cancel full screen view Click the Speaker and Microphone buttons to switch the sound off and on for the speaker and microphone respectively Use the slider to ...

Страница 13: ...ssing Motion JPEG streams can use different image settings MPEG 4 This is a video compression standard that makes good use of bandwidth and which can provide high quality video streams at less than 1 Mbit s The MPEG 4 standard provides scope for a large range of different coding tools for use by various applications in different situations and the Video Server provides certain subsets of these too...

Страница 14: ...14 AXIS 241Q S QA SA Video and Audio Streams Notes MPEG 4 is licensed technology The Video Server includes one license for the decoder required ...

Страница 15: ...not possible to multicast over e g the Internet 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 simultaneously the server will at some point become overloaded There is also a maximum of 20 simultaneous viewers to be considered RTP RTSP This un...

Страница 16: ...or the quad stream This is set to 1 if omitted Other MPEG 4 clients Although it may be possible to use other clients to view the MPEG 4 stream it is not guaranteed to work in all cases For some other clients e g QuickTime the Video Object Type must be set to Simple It may also be necessary to adjust the advanced MPEG 4 settings To assess the video stream from e g QuickTime the following path can b...

Страница 17: ...amed from the client to the server over HTTP when using Motion JPEG and MPEG 4 Accessing the Audio Streams In addition to accessing audio in the Live View page using AMC audio from the Video Server can also be accessed in the following ways HTTP API You can read about accessing audio for the other protocols through the HTTP API at http www axis com techsup QuickTime Windows Media Player It is poss...

Страница 18: ...udio Live View Config and Event Configuration settings The Video Server is configured from the Setup link in a standard browser see also the Technical Specifications on page 56 Accessing the Setup tools Follow the instructions below to access the Setup Tools from a browser 1 Start the browser and enter the IP address or host name of the Video Server in the location address field 2 The Live View pa...

Страница 19: ...Settings Image Appearance Modify the Image Appearance to optimize the video images according to your requirements All configuration of images and overlays will affect the performance of the Video Server depending on the usage and the available bandwidth High resolution generates larger files Lower compression improves image quality but generates larger files Black White uses less bandwidth than Co...

Страница 20: ...stream can be started by refreshing the page in the Web browser Note that the maximum video stream time does not apply to clients connecting via multicast To avoid bandwidth problems on the network the frame rate allowed to each viewer can also be limited Select either Unlimited or define a maximum frame rate per viewer For a preview of the image and overlay settings before saving click Test When ...

Страница 21: ...cations in different situations As most MPEG 4 clients do not support all of these tools it is usual to instead define and use subsets for different clients or groups of clients These settings allow you to define the type of viewing client to use Adjusting the maximum bit rate and setting it to variable or constant is a good way of controlling the bandwidth used by the MPEG 4 video stream For more...

Страница 22: ...same as the maximum image resolution See Technical Specifications on page 56 When a text overlay is also used this reduces the amount of space available to the overlay image To keep the text readable at lower resolutions the text overlay occupies proportionally more and more space i e 16 pixels in height at 640x480 32 pixels at 320x240 and 64 pixels at 160x120 If the overlay is initially positione...

Страница 23: ... of the AXIS 241QA SA must have a built in amplifier e g some PC speakers Audio Settings This section describes how to configure the basic audio settings for the AXIS 241QA SA e g set the communication mode and adjust the sound levels in the microphone and speaker connected to the camera Enable Audio Select the video source that the AXIS 241QA SA will transmit and receive audio from Audio Channels...

Страница 24: ... no audio will be transmitted from the AXIS 241QA SA to other web clients This could be used to e g provide spoken instructions to a person seen in a camera This mode requires you to use the push to talk button Simplex AXIS 241QA SA microphone only mode only transmits audio from the AXIS 241QA SA to any web clients It will not receive audio from any other web clients This can be used in remote mon...

Страница 25: ...f using a microphone that is placed close to the person talking and can also help reduce background noise The filter cuts the lowest and the highest frequencies The bypass frequency range is approximately 250Hz to 3700Hz measured at 10dB cut off break points Enable echo cancellation can reduce the feedback generated when using full duplex If sound distortion is encountered turning echo cancellatio...

Страница 26: ...lue can be set to High Medium High Medium low and Low A lower threshold will accept most of the audio to pass Only the weakest background noise will be reduced A higher threshold will make the noise canceller act on even stronger background noise At the maximum level High there is a risk of reducing useful audio as well There is a trade off between noise canceling and sound quality In other words ...

Страница 27: ...r own custom made page as the default web page Click the Configure button and see the following page The other settings on this page concern which other features to include e g buttons and links See page 28 for more information Customizing the default page The appearance of the default Video Server Live View page can be customized to suit your own requirements or you can upload and use your own ho...

Страница 28: ...k the box provided next to it and then click the Remove button To use your uploaded file click the radio button and select the file from the drop down list by Own To use an external file located somewhere other than in the Video Server click the radio button and enter the URL by External Own Home Page To use a previously uploaded web page as the default page check the checkbox select the page from...

Страница 29: ...e button activates the port for a defined period Active Inactive displays 2 buttons one for each action on off Default Video Format in Internet Explorer for Windows Select the default format to use on the Live View page Checking the box for Show video format selection displays a drop down list on the Live View page allowing you to temporarily change the format AMC AXIS Media Control Settings Check...

Страница 30: ...Live View page just as if they were video sources connected directly to the Video Server Click the Add button to open the External Video Source Setup dialog which is used to make all the necessary settings Example of a path to an external video source Sequence Mode The live view page can be configured to rotate through selected internal and or external video sources in order or randomly PTZ preset...

Страница 31: ... describing how and when the Video Server is to perform certain actions Triggered Event see page 32 the circumstances that start an event e g at a signal from an external device such as a door switch or a motion sensor Scheduled Event see page 33 the circumstances that start an event e g at a pre programmed time Action what occurs when the event runs e g video images uploaded to an FTP server emai...

Страница 32: ...action button in the web interface on restart reboot after e g power loss How to set up a triggered event This example describes how to set the Video Server to upload images when the main door is opened 1 Click Add triggered on the Event types page 2 Enter a descriptive name for the event e g Main door 3 Set the priority High Normal or Low see online help files 4 Select which Video Source the even...

Страница 33: ...ry will be created in the unit s log file Continue image upload unbuffered enable the upload of images for a fixed length of time Specify the length of time for the uploaded recording in seconds minutes or hours or for as long as the trigger is active Finally set the desired image frequency to the maximum the maximum available or to a specified frame rate The frame rate will be the best possible b...

Страница 34: ... target specific areas within the image Exclude windows are areas to be ignored within the Include window Once configured the motion detection windows will appear in a list when motion detection is selected to trigger an event See How to set up a triggered event above Note Using the motion detection feature may decrease overall performance in the Video Server How to configure Motion Detection This...

Страница 35: ... the status for the connected inputs and outputs of the Video Server This is for the benefit of an operator who cannot access the System Options section Example If the Normal state for a push button connected to an input is set to Open circuit as long as the button is not pushed the state is inactive If the button is pushed the state of the input changes to active If there are parts of the Include...

Страница 36: ...t and left the Tilt bar tips the camera up and down the Zoom bar zooms the view in and out Note that this is only available if the camera is fitted with a zoom lens Clicking on the bars themselves or on the arrows at the end of the bars will move the camera to a new position The type of movement and the location of this new position depends on the type of PTZ driver When controlling the camera usi...

Страница 37: ...e image the PTZ device moves the camera in that direction relative to the center of the image The further from the center the image is clicked the greater the movement Preset Positions Also available with many PTZ devices are Preset positions These presets are selected from the drop down Source list on the Live View page and will move and or zoom the camera to a pre defined position i e to cover a...

Страница 38: ... or RS 485 to configure 3 Select Pan Tilt Zoom from the Usage drop down list 4 Click Upload to install a PTZ driver PTZ drivers are available from the Axis Web site at www axis com 5 Click Port Options to modify the port settings The default values correspond to the values specified by the PTZ driver 6 From System Options Ports Devices select the port configured for PTZ and then select the video s...

Страница 39: ... to prevent unauthorized sources from including the video stream from the Video Server into external Web pages check the Referrals box and enter the IP address or Host name of the computer that hosts the Web pages with the included video stream Multiple IP addresses host names can be defined and are separated by semicolons Notes If the referrals feature is enabled and you wish to also allow normal...

Страница 40: ...elf signed certificate generates and installs a certificate which will be displayed under Installed Certificate Create Certificate Request generates a PEM formatted request which you copy and send to a CA for signing When the signed certificate is returned click Install signed certificate to install the certificate in the Video Server 4 Set the HTTPS Connection Policy for the administrator Operato...

Страница 41: ... the options for notification of IP address change under Services to receive notification from the Video Server when the IP address changes Alternatively if your DHCP server can update a DNS server you can access the Video Server by host name which is always the same regardless of the IP address Services Options for notification of IP address change if the IP address for the Video Server changes e...

Страница 42: ...IP addresses of the primary and secondary DNS servers Host Name Configuration The Video Server can be accessed using a host name instead of an IP address The host name is usually the same as the assigned DNS Name For more information please see the online help Link Local Address This is enabled by default and assigns the Video Server an additional IP address for use with UPnP The Video Server can ...

Страница 43: ... see the online help SOCKS SOCKS is a networking proxy protocol The Video Server can be configured to use a SOCKS server to reach networks on the other side of a firewall proxy server This functionality is useful if the Video Server is located on a local network behind a firewall but notifications uploads alarms etc need to be sent to a destination outside the local network e g to the Internet SMT...

Страница 44: ...out changing any of the settings Use this method if the unit is not behaving as expected Restore The unit is restarted and most current settings are reset to factory default val ues The settings that will not be reset are as follows the boot protocol DHCP or static the static IP address the default router the subnet mask the system time Default The default button should be used with caution Pressi...

Страница 45: ...ced Scripting is an advanced function that provides the possibility to customize and use scripts This function is a very powerful tool Caution Improper use may cause unexpected behavior or even cause loss of contact with the unit If a script does cause problems reset the unit to its factory default settings A backup file may be of use to return the unit to its latest configuration Axis strongly re...

Страница 46: ...Video Server to the factory default settings using the Control Button 1 Switch off the Video Server by disconnecting power 2 Press and hold the Control button while reconnecting the power 3 Keep the Control button pressed until the Status Indicator displays yellow this may take up to 15 seconds 4 Release the Control button 5 When the Status Indicator changes to Green may take up to 1 minute the pr...

Страница 47: ...49 Y C to BNC Cable AXIS 241S SA only on page 50 The D Sub Connector The Video Server provides one 9 pin D sub connector providing the physical interface for an RS 232 port used for connecting accessory equipment such as stand alone PTZ devices for the remote control of connected video cameras Pin assignment table and pinout of the RS 232 connector Pin Function 1 CD 2 RXD 3 TXD 4 DTR 5 GND 6 DSR 7...

Страница 48: ... above to determine which pin to use 2 Push the cable into the connector block and secure it by fastening the screw 3 Once all devices are connected connect the connector block to the Video Server s terminal connector Pin Function Description 1 Auxiliary DC Power Input 7 20 VDC min 8W Electrically connected in parallel with PS k power connector provides an auxiliary connector for mains power to th...

Страница 49: ...les the Video Server to receive status data and send com mands via HTTP Pan Tilt Zoom PTZ for controlling a PTZ device A PTZ device requires a driver for its function Drivers can be obtained from www axis com Please see page 36 for information on how to connect PTZ devices o z o z z z o o o z o o o oo A B Video Server Video Server 3 3V PS K 9W e g push button Device GND PIN 5 RS 485 9 10 11 12 o o...

Страница 50: ... of the unit to 1 on 2 on 3 off 4 off 5 Go to the AXIS 241S SA Web pages under Setup Video Image Video Source and select Y C S video from the Physical connector drop down list One female MiniDin 4 pol connector split into two BNC connectors Below is a description of how the cable is assembled for those who wish to use standard components 1 Use two male BNC connectors and one female 4 pole MiniDin ...

Страница 51: ...etwork Note Pre configured and customized settings will be retained for use when the new firmware is running pro vided the features are available in the new firmware although this is not guaranteed by Axis Communica tions 1 Save the firmware file to your computer The latest version of the Video Server firmware is available free of charge from the Axis Web site at www axis com techsup or from your ...

Страница 52: ...ears use the Browse button to select the upgrade file to use e g axis241qa bin or axis241sa bin Then click the Load button to restart the upgrade process 4 After the upgrade has completed 1 10 minutes the unit will automatically restart and show a steady green on the Power and Status LEDs and flashing green or amber on the Network LED 5 Reinstall the Video Server If the emergency recovery procedur...

Страница 53: ... the IP address again using the ARP Ping command 2 Access the unit and disable BOOTP and DHCP in the TCP IP settings Return the unit to the main network The unit now has a fixed IP address that will not change 3 As an alternative to 2 if dynamic IP address via DHCP or BOOTP is required select the required service and then configure IP address change notification from the network settings Return th...

Страница 54: ...lay incorrectly configured on your workstation In Display Properties configure your display to show at least 65000 colors i e at least 16 bit Using only 16 or 256 colors on your display will produce dithering artifacts in the image Incorrect exposure in images Incorrect line termination If the Video Server is to be connected in loop through with other equipment disable the input termination by tur...

Страница 55: ...tra tor to do this Full duplex not supported Sound card does not support full duplex For information on how to check if your sound card supports full duplex please visit http support microsoft com Firewall or router settings AXIS 241QA SA works locally but not externally Check the Internet firewall settings with your system administrator or reconfigure the default router settings DC power not enab...

Страница 56: ...G 23 MPEG 4 Rotation 90o 180o 270o Aspect ratio correction Color and black white Overlays time date text image Audio features Full duplex audio Select the encoding format from System Options ADPCM format at 24kbps 8 kHz sampling G 726 select G723 from drop down list ADPCM format at 32kbps 8 kHz sampling G 726 select G721 from drop down list PCM µ law format at 64kbps 8 kHz sampling G 711 default S...

Страница 57: ...cessors and memory CPU ETRAX 100 LX 32 bit Video processing and compression ARTPEC 2 chip RAM AXIS 241Q QA 64MB RAM AXIS 241S SA 32MB Flash memory 8 MB Power External power adapter PS K included 9V DC 9W Via terminal connector 7 20V DC max 8W Operating conditions Temperature 5o C 41o F to 50o C 122o F Humidity 20 80 RH non condensing System integration support API for software integration availabl...

Страница 58: ...onstrated by compliance with EN 55022 1998 Class B Approvals Safety EN60950 UL CSA PS K power adapter Dimensions HxWxD 42 x 140 x 155mm 1 11 16 x 5 1 2 x 6 1 8 Weight 540g 1 2 lb excluding power adapter Complimentary Software AXIS Media Control AMC ActiveX component software required for Microsoft Internet Explorer installed automatically on first use Optional AXIS IP Utility Windows installation ...

Страница 59: ...cessing 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 l...

Страница 60: ...level of 50 Note that these values are guidelines only actual values may vary Frame rates MPEG 4 The following test results show the frame rates in frames second fps for MPEG 4 streams from the Video Server Note that these values are guidelines only actual values may vary The MPEG 4 test conditions Compression level 50 Video Object Type Advanced Simple GOV structure IP Note that setting the GOV st...

Страница 61: ...o Server the audio settings There are also factors in the monitored scene that will affect the bandwidth These are the amount of motion the image s complexity the lighting conditions For MPEG 4 if there is only limited bandwidth available and if this is more important than the image quality using a constant bit rate CBR is recommended Use a variable bit rate VBR if the image quality needs to be ma...

Страница 62: ...s channel It is a pulse code modulation PCM scheme operating at 8 kHz sample rate G 726 Frequently used speech compression algorithm in telecommunications due to its high perceived speech quality and low resource requirements Half duplex A half duplex link communicates in one direction at a time only much like a walkie talkie Two way communication is possible but not simultaneously HTTP Hypertext ...

Страница 63: ... all data to all devices connected to it a switch only transmits the data to the device it is specifically intended for TCP IP Transmission Control Protocol Internet Protocol A suite of network protocols that determine how data is transmitted TCP IP is used on many networks including the Internet TCP keeps track of the individual packets of information and IP contains the rules for how the packets...

Страница 64: ...6 Customize 27 D Date Time 40 DC power 48 Default viewer 29 Digital input 48 DIP switch 6 8 DNS configuration 42 E Email server 43 Emergency recovery 52 Event servers 31 Event types 31 External video 30 External video sources 11 F Factory default settings 46 Frame rates 20 60 FTP server 31 Full duplex 23 24 G Generic HTTP 49 Generic TCP IP 49 H Half duplex 23 24 Host name 42 HTML examples 30 HTTP ...

Страница 65: ...r 33 PTZ commands 28 37 PTZ control queue 37 Pulse 11 29 Push to talk 24 Q Quad stream 11 21 R Recovery 52 Referrals 39 Relative and absolute PTZ drivers 36 Restart 44 Restore 44 RS 232 serial connector 9 RS 485 48 RTP 14 44 RTSP 14 42 S Scheduled event 31 Security 39 Sequence mode 11 30 Serial number 8 Services 41 Simplex 23 SMTP settings 43 Snapshot 12 SOCKS server 43 Specifications 56 Streaming...

Страница 66: ...66 AXIS 241Q S QA SA Index Video source 11 20 Video streams 13 16 20 View size 11 Y Y C to BNC cable 50 ...

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