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Using "Auto" option of MediaCaptureMemoryPreference returns "null" frame (SoftwareBitmap)


I am trying to build an app that captures the video frames from the Locatable camera of the HoloLens.

I have referred to the following article :
and this:

As suggested, I am getting hold of the SoftwareBitmap, when in "Auto" mode, via the IDirect3DSurface -
var bitmap = SoftwareBitmap.CreateCopyFromSurfaceAsync(frame.VideoMediaFrame.Direct3DSurface)

The bitmap always evaluates to null on HoloLens. While it works well on other UWP based devices.

Can someone kindly help how to address this issue?


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