ASP.NET AMR文件转换MP3

 NuGet，搜索安装NReco.VideoConverter

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

using System.IO;
using NReco.VideoConverter;

namespace AudioConverter
{
    class Program
    {
        static void Main(string[] args)
        {
            string downPath = Path.GetFullPath("../../download/132532654780617863.amr");
            string mp3Path = Path.GetFullPath("../../download/132532654780617863.mp3");

            // 音频转换
            var ffMpeg = new NReco.VideoConverter.FFMpegConverter();

            // 设置比特率为124k
            ConvertSettings setting = new ConvertSettings() { AudioSampleRate = 44100 };

            // 转换为音频
            ffMpeg.ConvertMedia(downPath, "amr", mp3Path, "mp3", setting);

            // 转换为视频
            //ffMpeg.ConvertMedia("input.mov", "output.mp4", Format.mp4);
        }
    }
}