Add project files.

UI/WPF.Controls/CameraPreview/CameraPreview.cs

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+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Media.Imaging;
+using System.Windows.Threading;
+using TheXamlGuy.Media.Capture;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using System;
+using System.Windows.Interop;
+using System.Runtime.InteropServices;
+
+namespace TheXamlGuy.UI.WPF.Controls;
+
+public class CameraPreview : Control
+{
+    private Image? image;
+
+    public CameraPreview()
+    {
+        DefaultStyleKey = typeof(CameraPreview);
+    }
+
+    public override void OnApplyTemplate()
+    {
+        image = GetTemplateChild("Image") as Image;
+    }
+
+    public async Task StartAsync(IMediaFrameSource source)
+    {
+        MediaCaptureInitializationSettings settings = new()
+        {
+            Source = source
+        };
+
+        MediaCapture mediaCapture = new();
+        mediaCapture.Initialize(settings);
+
+        if (await mediaCapture.CreateFrameReaderAsync() is IMediaFrameReader frameReader)
+        {
+            frameReader.FrameArrived += OnFrameArrived;
+            await frameReader.StartAsync();
+        }
+    }
+
+    public async Task StartAsync()
+    {
+        if (image is null)
+        {
+            return;
+        }
+
+        IReadOnlyList<IMediaFrameSource> sourceGroups = await MediaFrameSource.FindAllAsync();
+        if (sourceGroups.FirstOrDefault(x => x.DisplayName.Contains("USB", System.StringComparison.InvariantCultureIgnoreCase)) is IMediaFrameSource source)
+        {
+            if (source.SupportedFormats.OrderByDescending(x => x.Size.Width & x.Size.Height).FirstOrDefault() is MediaFrameFormat bestSupportedFormat)
+            {
+                source.SetFormat(bestSupportedFormat);
+            }
+
+            await StartAsync(source);
+        }
+    }
+
+    [DllImport("gdi32.dll")]
+    private static extern bool DeleteObject(IntPtr hObject);
+
+    private async void OnFrameArrived(IMediaFrameReader sender, MediaFrameArrivedEventArgs args)
+    {
+        if (image is null)
+        {
+            return;
+        }
+
+        if (await sender.TryAcquireLatestFrameAsync() is MediaFrame frame)
+        {
+            Dispatcher.Invoke(() =>
+            {
+                IntPtr handle = frame.Bitmap.GetHbitmap();
+                image.Source = Imaging.CreateBitmapSourceFromHBitmap(handle, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromWidthAndHeight(frame.Width, frame.Height));
+                DeleteObject(handle);
+            });
+        }
+    }
+}

UI/WPF.Controls/CameraPreview/CameraPreview.xaml

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+<ResourceDictionary
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:controls="clr-namespace:TheXamlGuy.UI.WPF.Controls">
+    <Style TargetType="controls:CameraPreview">
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="controls:CameraPreview">
+                    <Grid Background="{TemplateBinding Background}">
+                        <Image x:Name="Image" />
+                    </Grid>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+</ResourceDictionary>