[UWP][VB]Limiting Stream Size For MediaCapture

Question

question

RoyLi-MSFT asked Dec 12, '19 RoyLi-MSFT answered Dec 12, '19

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

5 |1600 characters needed characters left characters exceeded

Attachments: Up to 10 attachments (including images) can be used with a maximum of 3.0 MiB each and 30.0 MiB total.

Answer 1 · 2019-12-12T08:33:19.143Z

RoyLi-MSFT answered Dec 12, '19

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)

5 |1600 characters needed characters left characters exceeded

Attachments: Up to 10 attachments (including images) can be used with a maximum of 3.0 MiB each and 30.0 MiB total.