CameraResolution

topic	languages	products
sample	csharp cpp cppcx js	windows windows-uwp

Camera resolution sample

Shows how to change the resolution of a capture device with the GetMediaStreamProperties and SetMediaStreamPropertiesAsync methods.

Note: This sample is part of a large collection of UWP feature samples. If you are unfamiliar with Git and GitHub, you can download the entire collection as a ZIP file, but be sure to unzip everything to access shared dependencies. For more info on working with the ZIP file, the samples collection, and GitHub, see Get the UWP samples from GitHub. For more samples, see the Samples portal on the Windows Dev Center.

This sample covers the three common scenarios for changing the resolution:

Scenario 1: Changing the resolution of the preview.

1. Press the Initialize Camera button to populate the combo box with the resolutions returned by the GetAvailableMediaStreamProperties method.
2. When an option from the combo box is selected, the changes will be reflected in the preview.

Scenario 2: Changing the resolution of the preview and photo streams seperately.

1. Press the Initialize Camera button to populate the combo boxes with the resolutions returned by the GetAvailableMediaStreamProperties method.
2. When an option from the preview stream combo box is selected, the changes will be reflected in the preview.
3. When an option from the photo stream combo box is selected, the changes will be reflected in any photos taken with the photo button.
   • Some devices may share streams, which will result in changes made to one stream also being applied to other streams.

Scenario 3: Keeping the aspect ratios the same.

1. Press the Initialize Camera button to populate the combo boxes with the resolutions returned by the GetAvailableMediaStreamProperties method. Video settings will be based on the aspect ratio of the default resolution.
2. When an option from the preview stream combo box is selected, the changes will be reflected in the preview. If the aspect ratio has changed, the video combo box will also change to show only formats that match the aspect ratio.
3. When an option from the video stream combo box is selected, the changes will be reflected in any videos taken with the video button.
   • Some devices may not support multiple streams and changes will also be reflected in the preview.
   • Although this sample shows maintaining the aspect ratio only between the preview and video streams, the same should be done with the photo stream when capturing photos.

Related topics

Samples

Basic camera app sample
Media capture using capture device

Reference

Windows.Media.Devices namespace
Windows.Media.Capture.MediaCapture namespace
Windows.Media.Capture.MediaCaptureInitializationSettings constructor
Windows.Media.Capture.MediaCaptureInitializationSettings.VideoDeviceId property
Windows.Devices.Enumeration.DeviceInformation class
Windows.Graphics.Imaging.BitmapDecoder class
Windows.Graphics.Imaging.BitmapEncoder class
Capture photos and video with MediaCapture

System requirements

Client: Windows 10

Server: Windows Server 2016 Technical Preview

Phone: Windows 10

Build the sample

1. If you download the samples ZIP, be sure to unzip the entire archive, not just the folder with the sample you want to build.
2. Start Microsoft Visual Studio 2017 and select File > Open > Project/Solution.
3. Starting in the folder where you unzipped the samples, go to the Samples subfolder, then the subfolder for this specific sample, then the subfolder for your preferred language (C++, C#, or JavaScript). Double-click the Visual Studio Solution (.sln) file.
4. Press Ctrl+Shift+B, or select Build > Build Solution.

Run the sample

The next steps depend on whether you just want to deploy the sample or you want to both deploy and run it.

Deploying the sample

• Select Build > Deploy Solution.

Deploying and running the sample

• To debug the sample and then run it, press F5 or select Debug > Start Debugging. To run the sample without debugging, press Ctrl+F5 or select Debug > Start Without Debugging.