DW Spectrum User Manual
DW Spectrum automatically discovers devices and configures the optimal streaming parameters to fetch data from devices. For this purpose, the ONVIF protocol is used. The information below is generally applicable to the Advanced and Expert settings dialogs of a camera, the can reached by selecting a camera, activating the context menu (right-click), and then select the tab that contains the relevant information.
The communication is configured according to the ONVIF Network Interface specification.
DW Spectrum supports different ONVIF Network Interface specifications:
•Media – the older one (is supported by all ONVIF devices)
•Media2 – the newer one.
If the device reports that Media2 is supported, DW Spectrum will try to use it.
The audio and video communication is configured through stream profiles.
A profile describes the set of parameters related to audio/video transport from a device to the DW Spectrum Server:
•A/V Codec
•Bitrate
•Resolution
•Additional parameters.
Usually, cameras provide 2 independent stream profiles:
•Primary stream (Hi-Res)
•Secondary Stream (Lo-res) – used for motion detection, browsing archive etc (see "Dual Stream Processing" for details).
Cameras may provide additional stream profiles (more than 2) but DW Spectrum uses only Primary and Secondary ones.
In some cases, the profiles can be fetched and identified incorrectly. In this case it may be necessary to configure stream profiles manually.
To access those settings, use the camera's context menu to open Camera Settings > Expert > Media Streaming:
•Primary and Secondary Stream Profiles – specify the stream profiles for Primary and Secondary streams.
The available profiles may vary depending on the vendor or model of the device used.
By default, DW Spectrum configures the optimal parameters for the stream profiles but it can be turned off and the settings setup on Camera can be used unchanged (see "Preventing DW Spectrum from Changing Device Settings").
•Use Media2 to fetch profiles – in some case Media2 can work incorrectly. In this case it is possible to select the following options:
•Never – always use Media to configure stream profiles
•Use if supported – use Media2 if the device indicates its support
•Auto – use the built-in method to discover if the device supports Media2.
Profile M - Key Concepts:
•The ONVIF Analytical Plugin integrates ONVIF Profile M analytics into DW Spectrum for compatible devices.
•Profile M enables real-time event subscriptions and ability to processes ONVIF event notifications.
•The Primary functions are event parsing and topic tree management for analytics events.
•Real-time Pull-Point Notification Interface supports the latest and most common ONVIF subscription types.
•The Plugin subscribes to all events, without any filtering, as to receive any and all events supported by a camera.
•Filtering is done inside the plugin, allowing only the event types mentioned in user-created Event Rules.
•The profile M functionally provided is defined by the available devices and will vary between devices..
NOTE: Profile M support can be limited and may not be available for all devices that claim to be compatible.
Profile G Key Concepts:
•An option to enable the Import from Device service will appear in the Camera Settings > Expert tab for supported devices.
•The Main Menu will include an entry to open the Import from Devices dialog window when supported devices are connected.
•Only camera or server offline periods that occurred after enabling the Import from Device option will be imported automatically.
•When the Import from Device is disabled, any offline periods that have not yet been imported will be lost and cannot be recovered.
NOTE: Profile G support is provided for the following cameras:
•Hanwha XND-C9083RV
•Uniview IPC2325SB-DZK-I0
•Vivotek FD/IB9391-EHTV-v2 series
•Vivotek FD/IB9365-EHTV-v2 series
See also:
•Disabling Recording of a Specific Stream
