Question

如何使用C#AMR文件转换成MP3

Answer 1

最近看来是跟声音干上了啊！
音频转换的第二种方法，这种方法相对第一种来说，要简单的多！
首先，你得下载个“ffmpeg.exe” 插件，然后把它放到你的项目中，如下图：

程序中会调用该文件，以助于转换音频格式！
上代码：

using System;
using System.Threading;
using System.IO;
using System.Diagnostics;
using System.Security;

public partial class cowala_201512Chritmas_amrtest : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
changedPlay.Visible = false;
}
}

protected void Ffmpeg_Click(object sender, EventArgs e)
{
if (AmrFileUp.HasFile)
{
string key = AmrFileUp.FileName;
string savepath = Server.MapPath("~/upload/amr/") + key;
AmrFileUp.SaveAs(savepath);

string mp3SavePth = Server.MapPath("~/upload/mp3/") + key.Split('.')[0].ToString() + ".mp3";

if (!string.IsNullOrEmpty(ConvertToMp3(savepath, mp3SavePth)))
{
changedPlay.Visible = true;
changedPlay.Attributes.Add("src", "upload/mp3/" + key.Split('.')[0].ToString() + ".mp3");
Response.Write("<script>alert('转换成功！');</script>");
}
}
}

public string ConvertToMp3(string pathBefore, string pathLater)
{
string c = Server.MapPath("/ffmpeg/") + @"ffmpeg.exe -i " + pathBefore + " " + pathLater;
string str = RunCmd(c);
return str;
}

/// <summary>
/// 执行Cmd命令
/// </summary>
private string RunCmd(string c)
{
try
{
ProcessStartInfo info = new ProcessStartInfo("cmd.exe");
info.RedirectStandardOutput = false;
info.UseShellExecute = false;
Process p = Process.Start(info);
p.StartInfo.UseShellExecute = false;
p.StartInfo.RedirectStandardInput = true;
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.RedirectStandardError = true;
p.Start();
p.StandardInput.WriteLine(c);
p.StandardInput.AutoFlush = true;
Thread.Sleep(1000);
p.StandardInput.WriteLine("exit");
p.WaitForExit();
string outStr = p.StandardOutput.ReadToEnd();
p.Close();

return outStr;
}
catch (Exception ex)
{
return "error" + ex.Message;
}
}
}