c# asp.net获取音频时长及音频转码

秒速五厘米 2022-06-06 02:49 562阅读 0赞

# 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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