Question

我想知道如何同时录制2个独立的音频通道。我有2个带麦克风的USB适配器。分别是发言者。我能找到的样本代码一次只支持单通道录制。请帮忙。感谢。

对于单通道我的代码如下;

MediaCapture audioCapture = new MediaCapture();
MediaCaptureInitializationSettings captureInitSettings = new MediaCaptureInitializationSettings();

captureInitSettings.StreamingCaptureMode = StreamingCaptureMode.Audio;
captureInitSettings.MediaCategory = MediaCategory.Other;
captureInitSettings.AudioProcessing = AudioProcessing.Default;

await audioCapture.InitializeAsync(captureInitSettings);

private async void recordChannelA()
    {
        StorageFolder externalDevices = KnownFolders.RemovableDevices;
        IReadOnlyList<StorageFolder> externalDrives = await externalDevices.GetFoldersAsync();
        StorageFolder usbStorage = externalDrives[0];

        if (usbStorage != null)
        {
            StorageFolder recordFolder = await usbStorage.CreateFolderAsync(recFolderName, CreationCollisionOption.OpenIfExists);
            await usbStorage.GetFolderAsync(recFolderName);
            StorageFile recordFile = await recordFolder.CreateFileAsync("Recording - " + DateTime.Now.ToString("yyyy-MM-dd_HH-mm-ss") + ".mp3", Windows.Storage.CreationCollisionOption.GenerateUniqueName);

            MediaEncodingProfile profile = null;
            profile = MediaEncodingProfile.CreateM4a(Windows.Media.MediaProperties.AudioEncodingQuality.Auto);
            await audioCapture.StartRecordToStorageFileAsync(profile, recordFile);

            Message.Text = "Recording ... ";

            recordingtimerRun = new TimeSpan(0, 0, 0);
            recordingTimer.Start();
        }
        else Message.Text = "Recording error !";
    }

更新; 我创建了一个列表视图＆＃39;对于枚举的设备并选择相应的捕获设备。但是，有一个语法错误，我无法将enumaration.deviceinformation转换为imediasource。

captureInitSettings.AudioSource = captureDeviceList[audioCaptureList.SelectedIndex];

更新：我设法让它发挥作用解决方案是

    captureInitSettingsA.AudioDeviceId = captureDeviceList[audioCaptureList.SelectedIndex].Id;
captureInitSettingsB.AudioDeviceId = captureDeviceList[audioCaptureList.SelectedIndex].Id;

但是，如何在应用设置中保存这些选项..这样当我重新启动时，我不必再次重新选择。

更新我设法保存audiocapture＆amp;的应用设置audiorender设备，但我不确定如何检索它们＆amp;还要检查是否保存了以前的设置。

Windows.Storage.ApplicationDataContainer localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
            Windows.Storage.StorageFolder localFolder = Windows.Storage.ApplicationData.Current.LocalFolder;

            localSettings.Values["audioACaptureSettings"] = captureAInitSettings.AudioDeviceId;
            localSettings.Values["audioARenderSettings"] = mediaPlayerA.AudioDevice.Id;
localSettings.Values["audioBCaptureSettings"] = captureBInitSettings.AudioDeviceId;
            localSettings.Values["audioBRenderSettings"] = mediaPlayerB.AudioDevice.Id;



private void loadAudioConfig()
    {
        Windows.Storage.ApplicationDataContainer localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
        Windows.Storage.StorageFolder localFolder = Windows.Storage.ApplicationData.Current.LocalFolder;

        if (localSettings.Values["audioACaptureSettings"] != null)
        {
            captureAInitSettings.AudioDeviceId = localSettings.Values["audioACaptureSettings"].ToString();
        }

        if (localSettings.Values["audioARenderSettings"] != null)
        {
            Object audioARenderValue = localSettings.Values["audioARenderSettings"];
            mediaPlayerA.AudioDevice = audioARenderValue;
        }

        if (localSettings.Values["PAaudioCaptureSettings"] != null)
        {
            captureBInitSettings.AudioDeviceId = localSettings.Values["audioBCaptureSettings"].ToString();
        }

        if (localSettings.Values["PAaudioRenderSettings"] != null)
        {
            Object audioBRenderValue = localSettings.Values["audioBRenderSettings"];
            mediaPlayerB.AudioDevice = audioBRenderValue;
        }

Answer 1

您可以参考本文档介绍如何store and retrieve settings and other app data。您可以将数据保存到“设置”和“文件”。使用“设置”时，它仅支持文档中提到的多种数据类型。如果使用文件，您可以存储二进制数据或启用您自己的自定义序列化类型。

在您提供的代码中，检查是否保存了以前的设置是正确的：

    if (localSettings.Values["audioACaptureSettings"] != null)
    {
        captureAInitSettings.AudioDeviceId = localSettings.Values["audioACaptureSettings"].ToString();
    }

但是如何将设置检索为AudioDevice是不正确的，因为它无法将字符串隐式转换为DeviceInformation。请尝试这种方式：

    if (localSettings.Values["audioARenderSettings"] != null)
    {
        var aduioSource = localSettings.Values["audioARenderSettings"] as string;
        mediaPlayerA.AudioDevice = await DeviceInformation.CreateFromIdAsync(aduioSource);
    }

UWP Windows 10 IoT 2声道同步录音

1 个答案: