Hey,

is there actually an option to use Vuforia marker tracking and the HoloLens live streaming at the same time?

Best regards

Thank you very much !

Refer to this post: https://developer.vuforia.com/forum/hololens/disable-camera-and-reenable-doesnt-work

I suggest you disable the camera via a voice command. And also enable it via a voice command for ease of use. Remember to stop the live stream if you want to re-enable the camera again in case you need to track another QR for example. You can also reset the scene.

Hi !

Can you give more details on how you do this ? I suppose you first start the app, then maybe track your target to initialize and after only you kill the camera (name of this command ?) and begin the live stream ?

Does this mean that during the stream there's no more recognition, only the visible objects added before ?

Thanks for help !

You can live stream whilst running a UWP Vuforia application on the Hololens. All you have to do is kill the camera instance and then the live stream will work. I check the status of the tracking is extended tracking before doing this then I know the model being displayed will stay in the scene as the Hololens' Extended tracking is handling this. You can then reinitialise the camera once stopping the live stream and also reset the tracking. You will know when you have successfully killed the camera instance used for tracking as the white light on the front of the Hololens will go off but you will still see your model.

Hello,

Based upon experiments with HoloLens while running Vuforia, here is what we know about the Mixed Reality Capture (MRC) feature:

1. You can record videos of Vuforia apps running on HoloLens. Note that for this to work, the app running Vuforia must be started *before* you started to record with HL’s MRC. If you start recording first, the video will abruptly stop once Vuforia gets access to the HL camera.

2. You *cannot* do MRC Live preview while a Vuforia app is running in any case. If you try to start Live preview while a Vuforia-based app is running on HL, you will get an error in MRC. If you try to start a Vuforia-based app while Live preview is running, the app will not start.

The limitations above are related to real-time camera access for apps running on the HL. In order to guarantee optimal detection and tracking performance, Vuforia is granted sole access to the live camera feed. This is similar to other platforms that we support, such as Android and iOS.

Thanks.

medabit wrote:

Hello,

Sorry, I don't know why this is happening so I have no advice at this time. I've had to produce several recordings of Vuforia running on HoloLens and have not experienced this issue.

Thanks.

Hi,

I tried with three differents hololens and the same problem.

My steps:

1- Open the vuforia app

2- Bloom gesture for minimize

3- Bloom again to open shelf menu

4- Tap in the record button

5- Tap in the vuforia app again

The result sometimes the app is restarted and other times the record is auto stopped.

Greetings.-

Hello,

Sorry, I don't know why this is happening so I have no advice at this time. I've had to produce several recordings of Vuforia running on HoloLens and have not experienced this issue.

Thanks.

medabit wrote:

Hello,

Mixed Reality Capture for the live view *does not* function while a Vuforia-based app is running and is using the camera. Recording works fine.

Thanks.

Hello medabit,

I tried to record in the same time when i use the vuforia app and the record is automatic stopped. Any advice?.

Anyone found a solution to this? I can disable the camera which would then allow live streaming but then sometimes the model disappears?

Hello,

Mixed Reality Capture for the live view *does not* function while a Vuforia-based app is running and is using the camera. Recording works fine.

Thanks.