c# asp.net获取音频时长及音频转码

直接上代码并见注释

/// <summary>        /// 利用ShellClass获取音频文件时长; /// 如果添加引用编译提示"不能引用嵌入式接口之类的错误",把引用属性里的嵌入式***,设为false;/// asp.net 环境下测试未通过,c#未测试;        /// </summary>        /// <param name="filePath">文件路径</param>        /// <returns></returns>        private int GetDurationByShellClass(string filePath)        {            try            {                ShellClass sh = new ShellClass();                Folder dir = sh.NameSpace(Path.GetDirectoryName(filePath));                FolderItem item = dir.ParseName(Path.GetFileName(filePath));                string str = dir.GetDetailsOf(item, 27); // 获取歌曲时长。                if (str != "")                {                    var matchs = Regex.Match(str, @"(\d{2}):(\d{2}):(\d{2})");                    var hour = Convert.ToInt32(matchs.Groups[1].Value);                    var minute = Convert.ToInt32(matchs.Groups[2].Value);                    var second = Convert.ToInt32(matchs.Groups[3].Value);                    var len = hour * 3600 + minute * 60 + second;                    return len;                }                else                {                    return 0;                }            }            catch (Exception ex)            {                Console.WriteLine(ex.Message);            }            return 0;        }/// <summary>        /// 利用WMPLib获取音频文件时长;/// 如果添加引用编译提示"不能引用嵌入式接口之类的错误",把引用属性里的嵌入式***,设为false;/// asp.net 环境下测试未通过,c#未测试;        /// </summary>        /// <param name="filePath"></param>        /// <returns></returns>        private int GetDurationByWMPLib(string filePath)        {            try            {                WMPLib.WindowsMediaPlayerClass player = new WMPLib.WindowsMediaPlayerClass();                player.URL = filePath;                var duration = Math.Ceiling(player.duration);            }            catch (Exception ex)            {                Console.WriteLine(ex.Message);            }            return 0;        }/// <summary>        /// 利用MediaInfoDotNet获取音频文件时长/// 如果添加引用编译提示"不能引用嵌入式接口之类的错误",把引用属性里的嵌入式***,设为false;/// asp.net 环境下测试未通过,c#测试通过;        /// </summary>        /// <param name="filePath"></param>        /// <returns></returns>        private int GetDurationByMediaInfoDotNet(string filePath)        {            try            {                MediaInfoDotNet.MediaFile aviFile = new MediaInfoDotNet.MediaFile(filePath);                if (aviFile.Audio.Count > 0)                {                    var duration = aviFile.General.Duration;                    return duration;                }            }            catch (Exception ex)            {                Console.WriteLine(ex.Message);            }            return 0;        }        [DllImport("Kernel32", CharSet = CharSet.Auto)]        static extern Int32 GetShortPathName(String path, StringBuilder shortPath, Int32 shortPathLength);        [DllImport("winmm.dll")]        public static extern int mciSendString(string m_strCmd, StringBuilder m_strReceive, int m_v1, int m_v2);        public static string MusicTime(string musicFilePath)//musicFilePath是歌曲文件地址        {            if (File.Exists(musicFilePath))//是否存在这个文件            {                //利用MCI命令,返回值为文件时间                StringBuilder shortpath = new StringBuilder(80);                GetShortPathName(musicFilePath, shortpath, shortpath.Capacity);                string musicname = shortpath.ToString();                StringBuilder buf = new StringBuilder(80);                mciSendString("close all", buf, buf.Capacity, 0);                mciSendString("open " + musicname + " alias media", buf, buf.Capacity, 0);                mciSendString("status media length", buf, buf.Capacity, 0);                //return buf.ToString().Trim();                double ms = Convert.ToDouble(buf.ToString().Trim());                TimeSpan ts = new TimeSpan(0, 0, 0, 0, (int)ms);                return ts.ToString().Substring(3, 5);//这里你自己去决定返回的是什么格式            }            return "0";//如果文件不存在就返回"0"        }/// <summary>        /// 利用ffmpeg获取指定文件的时长，单位:秒;        /// 调用:var duration = GetDurationByffmpeg(filePath, @"/ffmpeg.exe");        /// </summary>        /// <param name="fileName">文件路径</param>        /// <param name="ffmpegVirtualPath">ffmpeg.exe的虚拟路径</param>        /// <returns></returns>        public static int GetDurationByffmpeg(string fileName, string ffmpegVirtualPath)        {            int duration = 0;            try            {                if (!File.Exists(fileName))                {                    return 0;                }                using (System.Diagnostics.Process pro = new System.Diagnostics.Process())                {                    pro.StartInfo.UseShellExecute = false;                    pro.StartInfo.ErrorDialog = false;                    pro.StartInfo.RedirectStandardError = true;                    pro.StartInfo.FileName = System.Web.HttpContext.Current.Server.MapPath(ffmpegVirtualPath);                    // AppDomain.CurrentDomain.BaseDirectory +"ffmpeg.exe";                    pro.StartInfo.Arguments = " -i " + fileName;                    pro.Start();                    System.IO.StreamReader errorreader = pro.StandardError;                    pro.WaitForExit(1 * 1000);                    string result = errorreader.ReadToEnd();                    if (!string.IsNullOrEmpty(result))                    {                        result = result.Substring(result.IndexOf("Duration: ") + ("Duration: ").Length,                            ("00:00:00").Length);                        var matchs = Regex.Match(result, @"(\d{2}):(\d{2}):(\d{2})");                        var hour = Convert.ToInt32(matchs.Groups[1].Value);                        var minute = Convert.ToInt32(matchs.Groups[2].Value);                        var second = Convert.ToInt32(matchs.Groups[3].Value);                        var len = hour * 3600 + minute * 60 + second;                        duration = len;                    }                    return duration;                }            }            catch (Exception ex)            {                log.Error(ex);            }            return 0;        }        /// <summary>        /// 利用ffmpeg进行转码; 如 amr转mp3        /// </summary>        /// <param name="inputFile">输入文件，要转码的文件</param>        /// <param name="outputFile">转码后的文件</param>        /// <param name="ffmpegVirtualPath">ffmpeg.exe的虚拟路径</param>        /// <returns></returns>        public static bool FromffmpegTurnCode(string inputFile, string outputFile, string ffmpegVirtualPath)        {            try            {                if (!File.Exists(inputFile))                {                    return false;                }                using (System.Diagnostics.Process pro = new System.Diagnostics.Process())                {                    pro.StartInfo.UseShellExecute = false;                    pro.StartInfo.ErrorDialog = false;                    pro.StartInfo.RedirectStandardError = true;                    pro.StartInfo.FileName = System.Web.HttpContext.Current.Server.MapPath(ffmpegVirtualPath);                    // AppDomain.CurrentDomain.BaseDirectory +"ffmpeg.exe";                    pro.StartInfo.Arguments = " -i " + inputFile + " -y " + outputFile;                    pro.Start();                    System.IO.StreamReader errorreader = pro.StandardError;                    pro.WaitForExit(30 * 1000);                    return true;                }            }            catch (Exception ex)            {                log.Error(ex);            }            return false;        }

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