asp.net 获取音视频时长 的方法

http://www.evernote.com/l/AHPMEDnEd65A7ot_DbEP4C47QsPDYLhYdYg/

日志:

 
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 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:
                 //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~
 
 
posted @ 2015-05-27 20:40  肚肚  阅读(3992)  评论(0编辑  收藏  举报