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HoloLens - Capturing photo when locatable camera is in VideoMode (streaming)

edited May 2017 in Questions And Answers

Hello dear community,

I am trying to create a HoloLens application, which uses the built in WebCam to take photos and sends them to a rest interface for further face recognition. This is working well so far. To capture photos from the WebCam it needs to be in the PhotoMode.

The problem:
If I want now to present my application via live stream, the WebCam is set automatically to the VideoMode and capturing photos is not possible.
The locatable camera description https://developer.microsoft.com/en-us/windows/mixed-reality/locatable_camera_in_unity says:

"Only a single operation can occur with the camera at a time."

Since the application has to be presented to a great number of people it is absolutely essential to show it via live stream.

Does somebody have any general idea how to solve this problem, or maybe some possibility to access the WebCam in PhotoMode simultaneously to the streaming?

Many thanks in advance!


  • @Dimitri
    it is not possible because HoloLens not support multiple instance at a single time.

  • Does it mean, that for every application which needs to use the WebCam (e.g. for SpatialUnderstanding or sth. like marker tracking) I absolutely cannot use mixed reality streaming?

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