原文链接：https://www.evernote.com/shard/s115/sh/cc1039c4-77ae-40ee-8b7f-0db10fe02e3b/42c3c360b8587588

1.第一种方法：

 

调用：shell32.dll ，win7下可以，window2008 r2 服务器上 不行。（原因不知道，有可能是声卡驱动没有安装？）

//添加引用：COM组件的Microsoft Shell Controls And Automation

引用shell32底层接口c:windows\system32\shell32.dll，vs自动转换成interop.shell32.dll（注：64位系统和32位系统生成的interop.shell32.dll不一样） 参考：http://www.stepday.com/topic/?867

 

 

               string file = Request.Form["mp3path" ];

                Shell32. ShellClass sh = new Shell32.ShellClass();

                Folder dir = sh.NameSpace(Path .GetDirectoryName(file));

                FolderItem item = dir.ParseName(Path .GetFileName(file));

                log.Info( "file:" + file);

                string mp3Time = "" ;

                if (Environment .OSVersion.Version.Major >= 6)

                {

                    mp3Time = dir.GetDetailsOf(item, 27);

                }

                else

                {

                    mp3Time = dir.GetDetailsOf(item, 21);

                }

                sb.Append( "文件路径：" + file + "\r\n");

                sb.Append( "<br />");

                sb.Append( "服务器的OSVersion.Version.Major：" + Environment.OSVersion.Version.Major);

                sb.Append( "用Shell32.dll方式测试文件的时长：" + mp3Time);

                sb.Append( "<br />");

 

2.第二种方法：利用：mediainfo.dll：

MediaInfo.dll
846.3 KB

 

                MediaInfo MI = new MediaInfo();

                MI.Open(file);

                string s = MI.Get(StreamKind .Audio, 0, "Duration");

                string dateTimeStr = Common.TimeHelper .GetDateTimeStr(Convert.ToInt32(s));

                sb.Append( "用mediainfo.dll计算时长：" + dateTimeStr);

 

一样，也是win7下没有问题，服务器上有问题。

 

3, 第三种方法：利用：

ffmpeg.zip
5.7 MB

                 //用ffmpeg.exe 获取：

                sb.Append( "<br />");

                string fromffmpeg = Fromffmpeg(file);

                sb.Append( "fromffmpeg:" + fromffmpeg);

子方法：

private string Fromffmpeg(string fileName)

        {

            string duration = "" ;

            using (System.Diagnostics.Process pro = new System.Diagnostics. Process())

                    {

                        pro.StartInfo.UseShellExecute = false;

                        pro.StartInfo.ErrorDialog = false;

                        pro.StartInfo.RedirectStandardError = true;

 

                        pro.StartInfo.FileName = AppDomain.CurrentDomain.BaseDirectory +

 

"ffmpeg.exe";

                        pro.StartInfo.Arguments = " -i " + fileName;

 

                        pro.Start();

                        System.IO. StreamReader errorreader = pro.StandardError;

                        pro.WaitForExit(1000);

 

                        string result = errorreader.ReadToEnd();

                        if (!string .IsNullOrEmpty(result))

                        {

                            result = result.Substring(result.IndexOf( "Duration: ") +

 

("Duration: ").Length, ( "00:00:00").Length);

                            duration = result;

                        }

                        return duration;

 

                    }

        }

 

 

到此：成功！服务器ok~