自行停止录音机在C#中的延迟时间后(使用n音讯)
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25-09-2019 - |
题
我正在使用C#n音讯录制了音频和我需要删除所使用的停止按钮,一段时间延迟后简单地停止了自己的记录。
对于记录事件的代码
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);
}
停止按钮被给定为
private void cmbStop_Click(object sender, EventArgs e)
{
waveInStream.StopRecording();
waveInStream.Dispose();
waveInStream = null;
writer.Close();
writer = null;
cmbRecord.Enabled = true;
cmbStop.Enabled = false;
}
我需要自动停止cmbRecord_Click事件内的记录。 由于事先。
解决方案
使用定时器时,设置Interval
并在复制cmbStop_Click
事件代码计时器的OnTick
事件。使在mbRecord_Click
事件定时器和&记住禁用在cmbStop_Click
事件定时器
修改强>
创建一个新的计时器,并设置其值
//把这个线在表单级水平
System.Windows.Forms.Timer mytimer=new System.Windows.Forms.Timer(); //create a new Timer
//把这两个到您的形式构造方法仅InitializeComponent()
后;
mytimer.Interval=1000; //set the interval to 1 second.
mytimer.Tick += new EventHandler(mytimer_Tick);
启用在mbRecord_Click事件定时器
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;
}
后停止记录1秒..
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;
}
其他提示
有一件事情你可能要牢记 - 会有一个DataAvailable
回调的之后的调用StopRecording
(或期间,根据所使用的回调模型),所以你可能要延迟关闭在WaveFileWriter直到你写的一切。
有一个在所述 VoiceRecorder 样品其使用n音讯并停止在60秒后记录的项目。我在这篇文章解释如何记录自动为停止。
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();
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