How to represent a quad stream in ONVIF Interface for Multi Sensor camera with 4 Sensors

[venki5685]

For Multi Sensor Camera with 4 sensors, we want to represent a quad stream in ONVIF Interface for configuration of the quad stream (i.e resolution, encoding , fps , bitrate, quality parameters) and streaming the quad stream to ONVIF Client using RTSP Protocol.

We are thinking list a separate video encoder for quad stream configuration. ONVIF client can create a empty profile and attach a quad stream video encoder to the newly created profile. Here ONVIF Client also needs to attach video source for a profile along with quad stream video encoder.

Do we need to list a separate a video source for quad stream? If Yes, how this video source can be used during Imaging Service APIs? How the profile token used as part of PTZ Service APIs? We do not support imaging & ptz operations for quad stream.

[HansBusch]

VideoSourceConfiguration has a property ViewMode to describe the type of source. In your case tt:Quad would be the right choice.

[kieran242]

Agreed Hans. @venki5685 please review page 14 of the Media 2 specification were it outlines the various "View Mode" options from Fisheye ... DeWarp.

[venki5685]

Sure Hans & Kieran. Let me review Media2 specification View Mode Options.

[venki5685]

Media2 Service specification provides View Mode option in Video Source Configuration. For quad stream, View Mode can be configured as "Quad" in Video Source Configuration. But the Video Source Configuration is associated with Physical Video Source Token. For quad stream case, which video source token we need to associate with video source configuration?

If we assign dummy video source token (i.e virtual video source), that video source should be listed as part of GetVideoSources response. Then ONVIF Client gets 5 video sources for four heads camera, 4 are real video sources, one is virtual video source. But ONVIF interface does not have any parameter to know which is real video source, which is virtual video source and the capabilities of real & virtual video source.

[HansBusch]

Recap of discussion at last call:

A quad stream should be modeled as a fifth video source. Set the ViewMode of the related VideoSourceConfiguration to Quad in order to enable clients to identify it as a quad view.

Operations like Imaging settings and PTZ may not be supported. In this case

• Imaging:GetOptions would return an empty list of supported operations.
• PTZ:GetCompatibleConfigurations would return an empty list.

[venki5685]

Thanks Hans, It clarifies the query clearly. Hence closing the ticket.