ONVIF Node.js implementation based on this article. This is a wrapper to ONVIF protocol which allows you to get information about your NVT (network video transmitter) device, its media sources, control PTZ (pan-tilt-zoom) movements and manage presets.
##Supported methods
- GetSystemDateAndTime
- GetCapabilities
- GetVideoSources
- GetProfiles
- GetServices
- GetDeviceInformation
- GetStreamUri
- PTZRelativeMove
- PTZAbsoluteMove
##Installation
npm install onvif
##Tests
In the library directory run npm run-script test
##Quick example This example asks your camera to look up and starts a web server at port 3030 that distributes a web page with vlc-plugin container which translates video from the camera.
var
http = require('http'),
Cam = require('onvif').Cam;
new Cam({
hostname: CAMERA_HOST,
username: USERNAME,
password: PASSWORD
}, function(err) {
this.absoluteMove({x: 1, y: 1, zoom: 1});
this.getStreamUri({protocol:'RTSP'}, function(err, stream) {
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/html'});
res.end('<html><body>' +
'<embed type="application/x-vlc-plugin" target="' + stream.uri + '"></embed>' +
'</body></html>');
}).listen(3030);
});
});##API
var Cam = require('onvif').Cam;Options are:
- hostname
- username, password (optional, to deal with majority functions)
- port (optional)
Callback (optional) executes when the cam is initialised. Single argument for this function is possible error.
####Technical description
When the cam object creates it automatically sends three command to the ONVIF device:
getCapabilities, getVideoSources and getProfiles. After that it fills correspondent properties of an object:
- capabilities
- device
- events
- imaging
- media
- PTZ
- extension
- ptzUri (this is a link to #capabilities.PTZ.XAddr)
- videoSources
- $.token
- framerate
- resolution
- profiles, array of profile object
- name
- videoSourceConfiguration
- videoEncoderConfiguration
- PTZConfiguration
- defaultProfile (link to the first profile in profiles)
- activeSource (based on the default profile)
- sourceToken
- profileToken
- encoding
- width
- height
- fps
- bitrate
- ptz
Connect to the camera and fill device information properties with getCapabilities, getVideoSources, getProfiles methods
See more detailed information at http://www.onvif.org/ver10/media/wsdl/media.wsdl
After cam initialisation we can run several ONVIF commands.
There are several common methods that work without credentials. Here are they: getSystemDateAndTime.
Returns a Date object with current camera datetime in the callback.
Works without credentials (passed username and password arguments).
Returns a device information, such as manufacturer, model and firmware version in the callback
Works without credentials (passed username and password arguments).
Returns in callback and assigns to #services property an array consists of objects with properties: namespace, XAddr, version
Returns a URI that can be used to initiate a live media stream using RTSP as the control protocol The options are:
stream(optional) - defines if a multicast or unicast stream is requested. Possible values are: 'RTP-Unicast' (default), 'RTP-Multicast'protocol(optional) - defines the network protocol for streaming. Possible values are: 'UDP', 'TCP', 'RTSP' (default), 'HTTP'profileToken(optional) - defines media profile to use and will define the configuration of the content of the stream. Default is#activeSource.profileToken
Returns the saved presets as an a key-value object where the key is the name of a preset and a value is a preset token.
This method also stores the presets information in a #presets property of an object.
The options are:
profileToken(optional) - defines media profile to use and will define the configuration of the content of the stream. Default is#activeSource.profileToken
This is a relative pan-tilt-zoom method. Options for this method is a delta between desired and current position of the camera.
The options are:
-
xPan, number or a string within -1 to 1, optional -
yTilt, number or a string within -1 to 1, optional -
zoomZoom, number or a string within -1 to 1, optional -
speedAn object with propertiesxPan speedyTilt speedzoomZoom speed
If the speed option is omitted, the default speed set by the PTZConfiguration will be used.
Callback is optional and means essentially nothing
This is an absolute pan-tilt-zoom method. Options for this method is an absolute position of the camera.
The options are:
-
xPan, number or a string within -1 to 1, optional -
yTilt, number or a string within -1 to 1, optional -
zoomZoom, number or a string within -1 to 1, optional -
speedAn object with propertiesxPan speedyTilt speedzoomZoom speed
If the speed option is omitted, the default speed set by the PTZConfiguration will be used.
Callback is optional and means essentially nothing
Returns an object with the current PTZ values.
{
position: {
x: 'pan position'
, y: 'tilt position'
, zoom: 'zoom'
}
, moveStatus: {} // camera moving
, utcTime: 'current camera datetime'
}Get all the existing PTZConfigurations from the device. Configurations saved into #configurations property
Get supported coordinate systems including their range limitations for selected configuration. Extends corresponding configuration object
##Links WSDL schemes: