标签:lse class folder 启动 ring ror yum trace exists
第一步
On CentOS/RHEL 6.*: $ sudo rpm -Uvh http://li.nux.ro/download/nux/dextop/el6/x86_64/nux-dextop-release-0-2.el6.nux.noarch.rpm On CentOS/RHEL 7: $ sudo rpm -Uvh http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-1.el7.nux.noarch.rpm $ yum repolist 第二步:yum install ffmpeg
安装后,查看版本,来进行是否安装成功判断;(用whereis ffmpeg可以查看其安装路径;)
/usr/bin/ffmpeg -version
/// <summary> /// 获取视频首帧图 /// </summary> /// <param name="vediofilepath"></param> /// <param name="directImagedirectory"></param> /// <param name="ffmpegpath"></param> /// <returns></returns> public static string GetVedioFirstImage(string vediofilepath, string directImagedirectory, string ffmpegpath) { if (string.IsNullOrEmpty(vediofilepath)) { return string.Empty; } string str_CommandArgs = ""; var file1 = new FileInfo(vediofilepath); if (file1.Exists) { try { //string save_folder = file1.FullName.Replace(file1.Name, ""); //string image_file = "video_" + file1.Name.Replace(file1.Extension, ".jpg"); var basepath = directImagedirectory + DateTime.Now.ToString("yyyyMMdd") + "/"; if (!Directory.Exists(directImagedirectory)) { Directory.CreateDirectory(directImagedirectory); } if (!Directory.Exists(basepath)) { Directory.CreateDirectory(basepath); } //string image_file = "video_" + file1.Name.Replace(file1.Extension, ".jpg"); string image_file = basepath + Guid.NewGuid().ToString("N") + ".jpg"; //#设置参数以直接输出图像序列(帧),第2秒 //str_CommandArgs = "-i " + vediofilepath + " -ss 00:00:02 -vframes 1 -an -y -f mjpeg " + image_file; str_CommandArgs = "-i " + vediofilepath + " -y -f image2 -ss 1 -vframes 1 " + image_file; System.Diagnostics.ProcessStartInfo cmd_StartInfo = new System.Diagnostics.ProcessStartInfo(ffmpegpath, str_CommandArgs); cmd_StartInfo.RedirectStandardError = false; //set false cmd_StartInfo.RedirectStandardOutput = false; //set false cmd_StartInfo.UseShellExecute = false; //set true cmd_StartInfo.CreateNoWindow = true; //don‘t need the black window //创建一个进程,分配它的ProcessStartInfo并启动它 System.Diagnostics.Process cmd = new System.Diagnostics.Process(); cmd.StartInfo = cmd_StartInfo; cmd.Start(); cmd.WaitForExit(); //System.Threading.Thread.Sleep(1000); return image_file; } catch (Exception ee) { throw new Exception(ee.StackTrace + ee.Message + " for: " + vediofilepath + " " + str_CommandArgs); } } else { return string.Empty; } }
标签:lse class folder 启动 ring ror yum trace exists
原文地址:https://www.cnblogs.com/chenyishi/p/12302053.html