Windows10 IoT Core：視頻錄制移動應用程序
windows10 IoT Core的視頻錄制移動應用程序，是一個展示如何在windows10 IoT Core上創建視頻捕獲移動應用程序的實例，同時也支持在拍攝過程中預覽視頻。
需求組件：
1個USB攝像頭
1個USB鼠標
1個HDMI顯示器和HDMI線
1個樹莓派2開發板
建立示例移動應用程序：
連接USB攝像頭，USB鼠標，HDMI顯示器，以太網電纜（或者WiFi無線網絡）到樹莓派2，然后打開它
下載示例，構建并部署到樹莓派2上
查看如何在樹莓派2上運行
移動應用程序建立核心步驟：
1、 打開VS2015，創建一個新的Windows通用空白應用程序：
2、啟用package.appxmanifest功能，確保麥克風和視頻庫（用于保存音頻文件）以及網絡攝像頭功能被選中：
在MainPage.xaml中，添加按鈕“開始捕捉”，“結束捕捉”，“播放拍攝的視頻”，增加一個“捕捉元件”用于視頻預覽和一個“媒體元件”用于視頻播放
<Button x:Name="btn1" Content="Start Capturing" Click="startCapture" Margin="10,50,0,0"></Button> <Button x:Name="btn2" Content="End Capturing" Click="stopCapture" Margin="10, 20,0,0"/> <Button x:Name="btn3" Content="Play Captured Video" Click="playVideo" Margin="10, 20, 0,20"/> <TextBox Text="Video Preview Window:" Margin="10,10,0,5" TextAlignment="Center" BorderThickness="0"/> <CaptureElement Name="capturePreview" Height="300" Margin="10,10,0,10" Width="300"/> <TextBox Text="Video Review Window" Margin="10,10,0,5" TextAlignment="Center" BorderThickness="0"/> <MediaElement Name="media" AutoPlay="True" AreTransportControlsEnabled="False" Height="300" Width="300" Margin="10,10,0,10" > </MediaElement>
在MainPage.xaml.cs中，你將需要枚舉找到錄像機設備：
var devices = await Windows.Devices.Enumeration.DeviceInformation.FindAllAsync(Windows.Devices.Enumeration.DeviceClass.VideoCapture);
設置“捕獲設置”：
captureInitSettings = new Windows.Media.Capture.MediaCaptureInitializationSettings();captureInitSettings.StreamingCaptureMode = Windows.Media.Capture.StreamingCaptureMode.AudioAndVideo;captureInitSettings.PhotoCaptureSource = Windows.Media.Capture.PhotoCaptureSource.VideoPreview;
初始化“媒體捕捉”：
mediaCapture = new Windows.Media.Capture.MediaCapture();await mediaCapture.InitializeAsync(captureInitSettings);
創建文件：
profile = Windows.Media.MediaProperties.MediaEncodingProfile.CreateMp4(Windows.Media.MediaProperties.VideoEncodingQuality.Qvga);
開始錄制：
var storageFile = await Windows.Storage.KnownFolders.VideosLibrary.CreateFileAsync("cameraCapture.wmv", Windows.Storage.CreationCollisionOption.GenerateUniqueName); await mediaCapture.StartRecordToStorageFileAsync(profile, storageFile);
也可以在拍攝過程中啟動預覽：
// start the preview capturePreview.Source=mediaCapture; await mediaCapture.StartPreviewAsync();
停止錄制和預覽：
private async void StopMediaCaptureSession() { await mediaCapture.StopRecordAsync(); recording = false; (App.Current as App).IsRecording = false; //stop the preview await mediaCapture.StopPreviewAsync(); }
播放錄像：
private async void playVideo(object sender, RoutedEventArgs e) { Windows.Storage.StorageFile storageFile = await Windows.Storage.KnownFolders.VideosLibrary.GetFileAsync(fileName); var stream = await storageFile.OpenAsync(Windows.Storage.FileAccessMode.Read); // mediaControl is a MediaElement defined in XAML if (null != stream) { media.Visibility = Visibility.Visible; media.SetSource(stream, storageFile.ContentType); media.Play(); } }
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