C# CSCore在用户停止通话时停止录音

Question

我目前正在尝试通过WasapiCapture和WaveWriter (CSCore包)录制音频，想在用户停止通话后停止录制。有人能帮我吗？

我想到的是，我可能会创建一个RecordingVolumeHandler，当音量低于某个阈值1到2秒时就会触发。我该怎么做呢？有没有办法从当前正在录制的音频输入中获取音量？

下面的代码是我用来启动和停止录制的两个函数。

    private WasapiCapture capture;
    private WaveWriter writer;

        private void startRecording()
    {
        capture = new WasapiCapture();
        capture.Initialize();
        writer = new WaveWriter("file.wav", capture.WaveFormat);
        capture.DataAvailable += (s, capData) =>
        {
            writer.Write(capData.Data, capData.Offset, capData.ByteCount);
        };
        capture.Start();
    }

    private void stopRecording()
    {
        if (writer != null && capture != null)
        {
            capture.Stop();
            writer.Dispose();
            capture.Dispose();
        }
    }

提前谢谢你！

Answer 1

您可以添加Timer计数静默时间。当它到期时-停止录制。我还没有测试过这段代码。定时器可能不会重置，但思路应该是清晰的。

private WasapiCapture capture;
private WaveWriter writer;
private Timer silenceTimer;

public Constructor()
{
    silenceTimer = new Timer();
    silenceTimer.Interval = 5000; // 5 seconds
    silenceTimer.Elapsed +=SilenceTimerElapsed;
}

private void SilenceTimerElapsed(object sender, ElapsedEventArgs e)
{
    silenceTimer.Stop();
    stopRecording();
}

private void startRecording()
{
    capture = new WasapiCapture();
    capture.Initialize();
    writer = new WaveWriter("file.wav", capture.WaveFormat);
    capture.DataAvailable += (s, capData) =>
    {
        writer.Write(capData.Data, capData.Offset, capData.ByteCount);
        silenceTimer.Stop();
        silenceTimer.Start(); // Resetting timer
    };

    silenceTimer.Start();
    capture.Start();
}

private void stopRecording()
{
    if (writer != null && capture != null)
    {
        capture.Stop();
        writer.Dispose();
        capture.Dispose();
    }
}