Question

我正在使用C＃中的NAudio录制音频，我需要删除所使用的停止按钮，并在一段时间延迟后自行停止录制。

记录事件的代码是

     private void cmbRecord_Click(object sender, EventArgs e)
     {
            outputFilename = "file address";

            waveInStream = new WaveIn(44100,2);
            writer = new WaveFileWriter(outputFilename, waveInStream.WaveFormat);

            waveInStream.DataAvailable += new EventHandler<WaveInEventArgs>(waveInStream_DataAvailable);
            waveInStream.StartRecording();


            // Just controling the objects on the screen.
            cmbRecord.Enabled = false;
            cmbStop.Enabled = true;

    } 


     void waveInStream_DataAvailable(object sender, WaveInEventArgs e)
    {
        writer.WriteData(e.Buffer, 0, e.BytesRecorded);
        int secondsRecorded = (int)(writer.Length / writer.WaveFormat.AverageBytesPerSecond);

    }

停止按钮为

      private void cmbStop_Click(object sender, EventArgs e)
    {
        waveInStream.StopRecording();
        waveInStream.Dispose();
        waveInStream = null;
        writer.Close();
        writer = null;

        cmbRecord.Enabled = true;
        cmbStop.Enabled = false;
    }

我需要在cmbRecord_Click事件中自动停止录制。提前谢谢。

Answer 1

使用Timer，设置Interval并将cmbStop_Click事件中的代码复制到计时器的OnTick事件中。在mbRecord_Click事件和＆amp;中启用计时器请记得在cmbStop_Click事件

中禁用计时器

修改

创建一个新计时器并设置其值

//将此行放在表单级别
中
System.Windows.Forms.Timer mytimer=new System.Windows.Forms.Timer(); //create a new Timer

//将这两个放在InitializeComponent()之后的表单构造函数中;

mytimer.Interval=1000; //set the interval to 1 second. mytimer.Tick += new EventHandler(mytimer_Tick);

在mbRecord_Click事件中启用计时器

private void cmbRecord_Click(object sender, EventArgs e) { outputFilename = "file address"; waveInStream = new WaveIn(44100,2); writer = new WaveFileWriter(outputFilename, waveInStream.WaveFormat); waveInStream.DataAvailable += new EventHandler<WaveInEventArgs>(waveInStream_DataAvailable); waveInStream.StartRecording(); // Just controling the objects on the screen. cmbRecord.Enabled = false; cmbStop.Enabled = true; //Enable the timer to fire mytimer.Enabled = true; }

1秒后停止录制..

void mytimer_Tick(object sender, EventArgs e) { waveInStream.StopRecording(); waveInStream.Dispose(); waveInStream = null; writer.Close(); writer = null; cmbRecord.Enabled = true; cmbStop.Enabled = false; //disable the timer here so it won't fire again... mytimer.Enabled = false; }

Answer 2

您可能想要记住一件事 - 在调用DataAvailable之后会有一个StopRecording回调（或在期间，取决于所使用的回调模型），所以你可能想要延迟关闭WaveFileWriter，直到你写完所有内容。

查看使用NAudio的VoiceRecorder示例项目，并在60秒后停止录制。我在this article中解释了录制是如何自动停止的。

long maxFileLength = this.recordingFormat.AverageBytesPerSecond * 60; int toWrite = (int)Math.Min(maxFileLength - writer.Length, bytesRecorded); if (toWrite > 0) writer.WriteData(buffer, 0, bytesRecorded); else Stop();

在c＃中延时后自行停止录音机（使用NAudio）

2 个答案: