从麦克风输入录制实时音频并同时保存

Question

我正在尝试使用C#开发语音记录器。我已经尝试了许多方法，比如NAudio、DirectX、Microsoft.Xna.Framework.Audio等。

所有的方法都得到了相同的结果。在停止录制后，输出文件mp3/wav会被保存。

mp3/wav文件在一开始就被创建了（没有任何内容-0字节）。

我正在尝试创建一个可以实时保存音频的应用程序。

    private void StartRecording() {
        this.WaveSource = new WaveInEvent { WaveFormat = new WaveFormat(44100, 1) };

        this.WaveSource.DataAvailable += this.WaveSourceDataAvailable;
        this.WaveSource.RecordingStopped += this.WaveSourceRecordingStopped;

        this.WaveFile = new WaveFileWriter(@"C:\Sample.wav", this.WaveSource.WaveFormat);

        this.WaveSource.StartRecording();
    }

    private void StopRecording() {
        this.WaveSource.StopRecording();
    }

    void WaveSourceDataAvailable(object sender, WaveInEventArgs e) {
        if (this.WaveFile != null) {
            this.WaveFile.Write(e.Buffer, 0, e.BytesRecorded);
            this.WaveFile.Flush();
        }
    }

    void WaveSourceRecordingStopped(object sender, StoppedEventArgs e) {
        if (this.WaveSource != null) {
            this.WaveSource.Dispose();
            this.WaveSource = null;
        }

        if (this.WaveFile != null) {
            this.WaveFile.Dispose();
            this.WaveFile = null;
        }
    }

- Sarin Vadakkey Thayyil

Answer 1

我已经解决了使用NAudio库本身的问题。只需要对现有代码进行少量修改。

public class Recorder {

    WaveIn sourceStream;
    WaveFileWriter waveWriter;
    readonly String FilePath;
    readonly String FileName;
    readonly int InputDeviceIndex;

    public Recorder(int inputDeviceIndex, String filePath, String fileName) {
        InitializeComponent();
        this.InputDeviceIndex = inputDeviceIndex;
        this.FileName = fileName;
        this.FilePath = filePath;
    }

    public void StartRecording(object sender, EventArgs e) {
        sourceStream = new WaveIn {
            DeviceNumber = this.InputDeviceIndex,
            WaveFormat =
                new WaveFormat(44100, WaveIn.GetCapabilities(this.InputDeviceIndex).Channels)
        };

        sourceStream.DataAvailable += this.SourceStreamDataAvailable;

        if (!Directory.Exists(FilePath)) {
            Directory.CreateDirectory(FilePath);
        }

        waveWriter = new WaveFileWriter(FilePath + FileName, sourceStream.WaveFormat);
        sourceStream.StartRecording();
    }

    public void SourceStreamDataAvailable(object sender, WaveInEventArgs e) {
        if (waveWriter == null) return;
        waveWriter.Write(e.Buffer, 0, e.BytesRecorded);
        waveWriter.Flush();
    }

    private void RecordEnd(object sender, EventArgs e) {
        if (sourceStream != null) {
            sourceStream.StopRecording();
            sourceStream.Dispose();
            sourceStream = null;
        }
        if (this.waveWriter == null) {
            return;
        }
        this.waveWriter.Dispose();
        this.waveWriter = null;
        recordEndButton.Enabled = false;
        Application.Exit();
        Environment.Exit(0);
    }
}

- Sarin Vadakkey Thayyil

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我们能否同时获取演讲者的音频？ - Ahmad

Answer 2

你可以使用 DirectShow 来完成这个任务。 请查看 Microsoft 的文档 和 项目的代码示例，以了解如何根据你的需求进行最佳配置。

- Thiago Sá

Answer 3

想尝试BASS NET吗？ 这里有一个完整的代码可以帮助你完成任务如何录制声音并将其编码为mp3？(C#!)。

- Leon Pro