[UWP][VB]Limiting Stream Size For MediaCapture

Question

question

RoyLi-MSFT asked · Dec 12, 2019 at 08:29 AM

I have a MediaCapture from which I want to capture a stream, as follows:

 Await Me.cardcapture.CapturePhotoToStreamAsync(ImageEncodingProperties.CreatePng(), stream)

This works fine, except that the stream is larger than I want (I want to keep it below 2MB). I have looked at the following page:

But I wasn't quite sure what to do. I also tried the following page:

But I couldn't get it to work. All I need is to get a smaller stream, can anybody help me? Thanks.

windows-uwp

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Answer 1 · 2019-12-12T08:33:19.143Z

RoyLi-MSFT answered · Dec 12, 2019 at 08:33 AM

Hello,

Welcome to Microsoft Q&A!

First, if you want to get smaller steam from CapturePhotoToStreamAsync, you could try to lower the steam resolution before you capture the photo using VideoDeviceController.SetMediaStreamPropertiesAsync() Method.

Here is the test I tried on my side:
alt text

alt text
From the screenshot, you could see that the size of the steam is smaller in the second test.

For more information, you could refer to Scenario 2 of the official sample here: CameraResolution.

123.png (429.3 KiB)

234.png (428.9 KiB)

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