ONVIF Cameras Discovery

ONVIF Cameras Network Discovery

It is possible to discover the ONVIF cameras in Multicast mode, by scanning a range of IP addresses, or both by invoking both functions consecutively.

The discovery is performed in the background.

Starting the discovery

• to discover the ONVIF cameras through a multicast request, invoke:

ONVIFDiscoverCameras_Multicast (timeout_seconds)

• to discover the ONVIF cameras through a range of IP addresses, invoke:

ONVIFDiscoverCameras_IPRange (first_IP, last_IP, timeout_seconds)

Note: a timeout of 2 to 5 seconds should be sufficient.

Stopping the discovery before its completion

• eventually invoke ONVIFCancelDiscovery () to stop the current background process, if needed.

Results of the discovery

• each camera discovered is notified by an event OnONVIFDiscoveryCompletedNotification (dcs_CameraFound, int CameraCount)

• the end of the multicast discovery is notified by an event OnONVIFDiscoveryCompletedNotification (dcs_MulticastCompleted, int CameraCount)

• the end of the IP range scanning is notified by an event OnONVIFDiscoveryCompletedNotification (dcs_IPRangeCompleted, int CameraCount)

From any of these events it is possible to invoke ONVIFEnumCamerasDiscovered for each camera whose index is specified by the CameraIndex parameter. When CameraIndex >= the number of cameras the function returns false

The sample code is included in the Delphi and C# MainDemo projects.