naudio从麦克风录制声音然后保存

Question

我在使用naudio和保存录音方面遇到了一些问题.我目前使用的代码可以保存wav文件,但是当我打开它时,Windows Media Player会返回错误:"Windows Media Player在播放文件时遇到问题"

我有两个按钮,一个"记录"按钮,在按下后变成停止按钮.我有一个"保存"按钮,单击该按钮可将录像保存到sample.wav.

NAudio.Wave.WaveIn sourceStream = null;
NAudio.Wave.DirectSoundOut waveOut = null;
NAudio.Wave.WaveFileWriter waveWriter = null;

private void recordButton_Click(object sender, EventArgs e)
{
    int deviceNumber = sourceList.SelectedItems[0].Index;

    sourceStream = new NAudio.Wave.WaveIn();
    sourceStream.DeviceNumber = deviceNumber;
    sourceStream.WaveFormat = new NAudio.Wave.WaveFormat(44100, NAudio.Wave.WaveIn.GetCapabilities(deviceNumber).Channels);

    NAudio.Wave.WaveInProvider waveIn = new NAudio.Wave.WaveInProvider(sourceStream);

    waveOut = new NAudio.Wave.DirectSoundOut();
    waveOut.Init(waveIn);

    sourceStream.StartRecording();
    waveOut.Play();

    recordButton.Visible = false;
    stopRecord.Visible = true;
}

private void saveResponse_Click(object sender, EventArgs e)
{
    int deviceNumber = sourceList.SelectedItems[0].Index;

    string saveLocation = "c:\\wav\\sample.wav";

    sourceStream = new NAudio.Wave.WaveIn();
    sourceStream.DeviceNumber = deviceNumber;
    sourceStream.WaveFormat = new NAudio.Wave.WaveFormat(44100, NAudio.Wave.WaveIn.GetCapabilities(deviceNumber).Channels);

    sourceStream.DataAvailable += new EventHandler<NAudio.Wave.WaveInEventArgs>(sourceStream_DataAvailable);
    waveWriter = new NAudio.Wave.WaveFileWriter(saveLocation, sourceStream.WaveFormat);

    sourceStream.StartRecording();

    MessageBox.Show("Recording successfully saved.");
}

private void sourceStream_DataAvailable(object sender, NAudio.Wave.WaveInEventArgs e)
{
    if (waveWriter == null) return;

    waveWriter.WriteData(e.Buffer, 0, e.BytesRecorded);
    waveWriter.Flush();
}
private void stopRecord_Click(object sender, EventArgs e)
{
    if (waveOut != null)
    {
        waveOut.Stop();
        waveOut.Dispose();
        waveOut = null;
    }
    if (sourceStream != null)
    {
        sourceStream.StopRecording();
        sourceStream.Dispose();
        sourceStream = null;
    }
    if (waveWriter != null)
    {
        waveWriter.Dispose();
        waveWriter = null;
    }

    recordButton.Visible = true;
    stopRecord.Visible = false;
    saveResponse.Enabled = true;
}

Answer 1

您的recordButton_Click代码不是录音,它是从a WaveIn到a 的管道数据WaveOut,它会将来自源(麦克风)的数据直接播放到输出(扬声器).它不保留该数据供以后使用,它只是将它从一个管道传输到另一个.如果要随后将该数据保存到磁盘,则需要自行缓冲.

在saveResponse_Click另一方面是开始从麦克风到磁盘上的一个波形文件数据的直接记录.如果单击Save Response按钮,稍等一下,然后单击Stop按钮,就会得到录制的波形文件.

如果你想直接录制到磁盘,这很好.如果你想记录到内存,然后可选择写入磁盘,那么你需要在数据进入时保存数据.也许在记录时使用内存流来保存数据,然后将其写入WaveFileWriter保存时的时间.文件.

这是我用于测试直接录制到磁盘上的wave文件的代码:

public WaveIn waveSource = null;
public WaveFileWriter waveFile = null;

private void StartBtn_Click(object sender, EventArgs e)
{
    StartBtn.Enabled = false;
    StopBtn.Enabled = true;

    waveSource = new WaveIn();
    waveSource.WaveFormat = new WaveFormat(44100, 1);

    waveSource.DataAvailable += new EventHandler<WaveInEventArgs>(waveSource_DataAvailable);
    waveSource.RecordingStopped += new EventHandler<StoppedEventArgs>(waveSource_RecordingStopped);

    waveFile = new WaveFileWriter(@"C:\Temp\Test0001.wav", waveSource.WaveFormat);

    waveSource.StartRecording();
}

private void StopBtn_Click(object sender, EventArgs e)
{
    StopBtn.Enabled = false;

    waveSource.StopRecording();
}

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

void waveSource_RecordingStopped(object sender, StoppedEventArgs e)
{
    if (waveSource != null)
    {
        waveSource.Dispose();
        waveSource = null;
    }

    if (waveFile != null)
    {
        waveFile.Dispose();
        waveFile = null;
    }

    StartBtn.Enabled = true;
}