微信语音amr转mp3

参考：https://www.cnblogs.com/LittleBai/p/5924416.html

转换方法一、

在线转：https://www.media.io/zh/

转换方法二、

命令行操作(基于fmpeg)：

ffmpeg -i G:\1.amr -vn -acodec libmp3lame -f mp3 -y G:\1.mp3

转换方法三、

工程代码下载：https://download.csdn.net/download/u010476739/10357640

借助fmpeg，直接输入amr路径和mp3路径即可

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace ConsoleApplication5
{
    class Program
    {
        static void Main(string[] args)
        {
            ConvertToMp3("1.amr", "1.mp3");
            Console.WriteLine("ok");
            Console.ReadLine();
        }

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

        /// 

        /// 执行Cmd命令
        /// 
        private static 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;
            }
        }
    }
}