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Axis 214 PTZ [12/53] Mpeg 4 protocols and communication methods
![Axis 214 PTZ [12/53] Mpeg 4 protocols and communication methods](/views2/1064163/page12/bgc.png)
12
AXIS 214 PTZ
MPEG-4 protocols and communication methods
To deliver live streaming video over IP networks, various combinations of transport protocols and broadcast
methods are employed.
• RTP (Realtime 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 which transport
protocol to use for the stream. RTSP is thus used by a viewing client to start a unicast session, see
below.
• UDP (User Datagram Protocol) is a communications
protocol that offers limited service for
exchanging data in a network that 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 e.g. 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 their own stream.
A benefit of unicasting is that if one stream fails, it only affects one user.
• Multicast is bandwidth-conserving technology
that reduces bandwidth usage by simultaneously
delivering a single stream of information to multiple network users. This technology is used pri-
marily on delimited networks (intranets), as each user
needs an uninterrupted data flow and
should not rely on network routers.
How to stream MPEG-4
Deciding the combination of protocols and methods to use depends on your viewing requirements, and on
the properties of your network. The available options in AMC are:
AMC negotiates with the camera to determine the transport p
rotocol to use in the order listed above. This
order can be changed and the options disabled, to suit specific requirements.
AXIS Media Control
The recommended method of accessing live video and audio from the AXIS 214 PTZ is to use the AXIS
Media Control (AMC) in Microsoft Internet Explorer in Windows. This ActiveX component is automatically
installed on first use, after which it can be configured by opening the AMC Control Panel applet from the
Windows Control Panel. Alternatively, right-click the video image in Internet Explorer.
Unicast RTP This unicast method (RTP over UDP) should
be your first consideration for live unicast
video, especially when it is important to
always have an up-to-date video stream,
even if some images are dropped.
Unicasting is used for video streaming, so that there is
no video traffic on the network until a client connects
and requests the stream.
Note that there are a maximum of 20 simultaneous
un
icast connections.
RTP over RTSP This unicast method (RTP tunneled over
RTSP) is useful as it is relatively simple to
configure firewalls to allow RTSP traffic.
RTP over RTSP over
HTTP
This unicast method can be used to traverse
f
irewalls. Firewalls are commonly configured
to allow the HTTP protocol, thus allowing
RTP to be tunneled.
Multicast RTP 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 cli-
ents viewing simultaneously. A multicast broadcast cannot how
ever, 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.
Содержание
- About this document 2
- Australia 2
- Axis communications 2
- Canada 2
- Electromagnetic compatibility emc 2
- Europe 2
- Intellectual property rights 2
- Legal considerations 2
- Liability 2
- Quick user s guide 2
- Safety notice battery replacement 2
- Safety notices used in this manual 2
- Support 2
- Trademark acknowledgments 2
- Weee directive 2
- Table of contents 3
- Product description 5
- Accessing the camera 7
- Accessing the camera from a browser 7
- Setting the password for root 7
- Accessing the camera from the internet 8
- The live view page 8
- Pan tilt zoom controls 9
- Viewer controls 9
- Ptz control queue 10
- Audio stream types 11
- Video and audio streams 11
- Video stream types 11
- Axis media control 12
- How to stream mpeg 4 12
- Mpeg 4 protocols and communication methods 12
- Accessing the audio streams 13
- Audio transmission methods 13
- Other methods of accessing the video stream 13
- Other mpeg 4 clients 13
- Accessing the setup link from a browser 14
- Configuring the camera 14
- Video image settings 15
- Advanced camera settings 16
- Overlay image 16
- Mpeg 4 17
- Axis media control 19
- Basic audio settings 20
- Advanced audio settings 22
- Layout 23
- Live view config 23
- External video 25
- Html examples 25
- Advanced calibration 26
- Advanced ctrl panel 26
- Advanced limits 26
- Control queue 26
- Guard tour 26
- Preset positions 26
- Ptz configuration 26
- Axis 214 ptz 27
- Event configuration 27
- Event servers 27
- Event servers and enter the required information for the selected server type 27
- Event type a set of parameters describing how and when the axis 214 ptz should perform cer tain actions an event type may result in a single event or it may result in many all depending on how often the conditions governing its behavior are met triggered event type an event that is activated by a specific internal or external trigger condi tion for example by motion detection or by an external device such as a door switch or a sensor scheduled event type an event that runs at a pre programmed time action what occurs when the event triggers e g the upload of video images to an ftp server or email notification 27
- For details on each setting please refer to the online help available from each web page 27
- Notification messages 27
- Terminology 27
- This section describes how to configure the axis 214 ptz for alarm and handling the axis 214 ptz can be configured to perform certain actions when certain types of events occur 27
- When the setup is complete the connection can be tested by clicking the test button the connection test will take approximately 10 seconds 27
- Event types 28
- Motion detection 29
- Scheduled events 29
- Port status 30
- Security https 31
- Security ip address filter 31
- Security users 31
- System options 31
- Security 802 x 32
- Date time 33
- Network basic tcp ip settings 33
- Network advanced tcp ip settings 34
- Network socks 35
- Network qos quality of service 36
- Network smtp email 36
- Network snmp 36
- You can activate trap reporting enter the ip address of the management server and choose the trap community to use when sending a trap message to the management system 36
- Maintenance 37
- Network bonjour 37
- Network rtp mpeg 4 37
- Network upnp 37
- Ports devices i o ports 37
- Advanced 38
- Resetting to the factory default settings 38
- Support 38
- Connecting audio equipment 39
- Connections 39
- I o inputs and outputs 39
- Schematic connection diagram 39
- Checking the firmware 40
- Troubleshooting 40
- Updating the firmware 40
- Axis 214 ptz 41
- If you contact the axis support desk please help us resolve your problems by providing a server report a log file and a brief description of the problem 41
- Logs reports the log file records events within the unit since the last restart of the system and can prove a useful diagnostic tool for troubleshooting 41
- Support 41
- Support overview the server report contains important information about the server and its software as well as a list of the current parameters 41
- Symptoms possible causes and remedial actions 41
- Axis 214 ptz 42
- For further assistance please contact your reseller or check the product s support pages on the axis website at http www axis com techsup 42
- Axis 214 ptz 43
- Technical specifications 43
- Axis 214 ptz 44
- Axis 214 ptz 45
- General performance considerations 45
- 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 bandwidth affected simultaneous viewing of different streams resolution compression etc by many clients frame rate and bandwidth affected accessing both motion jpeg and mpeg 4 video streams simultaneously frame rate and band width 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 45
- Ntsc ntsc aspect ratio corrected 45
- Optimizing your system 45
- Overlay settings and the help for file naming date time formats 45
- Pal pal aspect ratio corrected 45
- The axis 214 ptz ntsc delivers the following file sizes 45
- The axis 214 ptz pal delivers the following file sizes 45
- The following factors are among the most important to consider 45
- 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 45
- To see the bandwidth and frame rate currently required by the video stream the axis 214 ptz provides a tool that can be used to display these values directly in the video image 45
- When setting up the camera 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 45
- Bandwidth 46
- Frame rates motion jpeg 46
- Frame rates mpeg 4 46
- Axis 214 ptz 47
- Glossary of terms 47
- Axis 214 ptz 48
- Axis 214 ptz 49
- Axis 214 ptz 50
- Axis 214 ptz 51
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