public static string mp32wav(string mp3Path)
{
string wavPath = CommonServices.createFileFullPath("wav");
try
{
cmdVoid(CmdServices.FFMPEG, "-i " + mp3Path + " -ar 16000 " + wavPath);// -ar 16000 设置采样率，因为百度语音识别采样率为8000/16000
}
catch (Exception e)
{
throw new Exception("CmdServices.mp32wav error:" + e.Message);
}
return(wavPath);
}
public static string silk2wav(string silkPath)
{
string pcmPath = CommonServices.createFileFullPath("pcm");
string wavPath = CommonServices.createFileFullPath("wav");
try
{
cmdVoid(CmdServices.SILK_V3_DECODER, silkPath + " " + pcmPath);
//cmdVoid(CmdServices.FFMPEG, "-f s16le -y -ar 24000 -ac 1 -i " + pcmPath + " "+ wavPath);//ffmpeg pcm转wav,微信小程序生成的silk文件转pcm文件的采样率为24000，24000的采样率是固定的，这样生成的wav语速是正常的
cmdVoid(CmdServices.FFMPEG, "-f s16le -y -ar 24000 -ac 1 -i " + pcmPath + " -ar 16000 " + wavPath);
//string wavPath1 = CommonServices.createFileFullPath("wav");
//cmdVoid(CmdServices.FFMPEG, "-i "+wavPath + " -ar 16000 " + wavPath1);//采样率为24000的wav转16000的wav,便于百度语音识别
return(wavPath);
}
catch (Exception e)
{
throw new Exception("CmdServices.silk2wav error:" + e.Message);
}
}