1、线程
using System; using System.Collections.Generic; using System.Diagnostics; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Threading; namespace Common { public class FFmpeg { int timeCount; string creTimeStr; string rowId; string compPath; string speedStr = "."; public void Execute(string para, string ffmpegPath, string timestr, string Id, string targetUrl) { try { //Task.Run(() => //{ new Thread(()=> { //ThreadPool.SetMinThreads(1, 1); //ThreadPool.SetMaxThreads(1, 1); //ThreadPool.QueueUserWorkItem(new WaitCallback(pool=> { this.creTimeStr = timestr; this.rowId = Id; this.compPath = targetUrl; // Process p = new Process(); p.StartInfo.FileName = ffmpegPath; p.StartInfo.Arguments = para; //执行参数 p.StartInfo.UseShellExecute = false; p.StartInfo.CreateNoWindow = true; p.StartInfo.RedirectStandardInput = true; p.StartInfo.RedirectStandardOutput = true; p.StartInfo.RedirectStandardError = true;//把外部程序错误输出写到StandardError流中 p.ErrorDataReceived += new DataReceivedEventHandler(p_ErrorDataReceived); p.OutputDataReceived += new DataReceivedEventHandler(p_OutputDataReceived); using (p) { p.Start(); p.BeginErrorReadLine();//开始异步读取 p.WaitForExit();//阻塞等待进程结束 string sqlStr = "UPDATE Tbl_File SET File_Path2='" + this.compPath + "',File_State='压缩成功' where ID=" + this.rowId; int count = Common.DataLink.ExecuteSql(sqlStr); if (count <= 0) { Logger.Info("压缩进度完结失败!" + this.rowId); } p.Close();//关闭进程 p.Dispose();//释放资源 } //})); }).Start(); //}); } catch (Exception ex) { Logger.Fatal("进程进程失败!" + ex); } } private void p_ErrorDataReceived(object sender, DataReceivedEventArgs e) { try { var output = e.Data; if (output != null) { if (output.Contains("Duration")) { Int32 indexOfDuration = output.IndexOf("Duration"); Int32 indexOfBegin = output.IndexOf(":", indexOfDuration); Int32 indexOfEnd = output.IndexOf(",", indexOfBegin); var duration = output.Substring(indexOfBegin + 1, indexOfEnd - indexOfBegin - 1); this.timeCount = ConvertStringtoSecond(duration); Logger.Info("id:" + this.rowId + "|视频时间:" + this.timeCount); } if (output.Contains("time=")) { string nowTime = DateTime.Now.ToString("yyy/MM/dd HH:mm:ss"); TimeSpan ts = DateTime.Parse(nowTime) - DateTime.Parse(creTimeStr); var minuteTime = ts.Days * 24 + ts.Hours * 60 + ts.Minutes * 60 + ts.Seconds; // Int32 indexOfTime = output.IndexOf("time="); Int32 indexOfBegin = output.IndexOf("=", indexOfTime); Int32 indexOfEnd = output.IndexOf("bitrate", indexOfBegin); string timeStr = output.Substring(indexOfBegin + 1, indexOfEnd - indexOfBegin - 1); // var time = Convert.ToDouble(ConvertStringtoSecond(timeStr)); // var process = time / this.timeCount * 100; //当前毫秒单位 process = Math.Round(process); //if (string.IsNullOrWhiteSpace(Convert.ToString(CacheHelper.Instance.Get(uuidN)))) //{ // CacheHelper.Instance.Add(uuidN, string.Format("{0}%", process), 30); //} //else //{ // CacheHelper.Instance.Update(uuidN, string.Format("{0}%", process), 30); //} //Console.Write("{0}% ", process); Logger.Info("id:" + this.rowId + "|压缩进度:" + process + "%"); if (minuteTime > 30 && process != 100) { this.creTimeStr = nowTime; Logger.Info("id:" + this.rowId + "|每隔间段压缩进度:" + process + "%"); if (double.IsPositiveInfinity(process) || double.IsNegativeInfinity(process) || double.IsNaN(process)) //非无穷大 { switch (speedStr) { case ".": speedStr = ".."; break; case "..": speedStr = "..."; break; case "...": speedStr = "."; break; default: break; } string sqlStr = "UPDATE Tbl_File SET File_State='压缩处理中" + speedStr + "' where ID=" + this.rowId; int count = Common.DataLink.ExecuteSql(sqlStr); } else { string sqlStr = "UPDATE Tbl_File SET File_State='" + "压缩进度..." + process + "%' where ID=" + this.rowId; int count = Common.DataLink.ExecuteSql(sqlStr); } } else if (process == 100) { Logger.Info("id:" + this.rowId + "|完成压缩进度:" + process + "%"); //string sqlStr = "UPDATE Tbl_File SET File_Path2='" + this.compPath + "',File_State='压缩成功' where ID=" + this.rowId; //int count = Common.DataLink.ExecuteSql(sqlStr); } } //Console.WriteLine(e.Data); } } catch (Exception ex) { //Logger.Fatal("压缩进度读取失败!" + ex); } } private static int ConvertStringtoSecond(string timeStr) { int totalSecond = 0; try { DateTime dateTime = Convert.ToDateTime(timeStr); totalSecond = dateTime.Hour * 3600000 + dateTime.Minute * 60000 + dateTime.Second * 1000 + dateTime.Millisecond; } catch (System.Exception ex) { Console.Write(ex.Message); } return totalSecond; } private static void p_OutputDataReceived(object sender, DataReceivedEventArgs e) { Console.WriteLine(e.Data); } } }
进程限制
public void Execute(string para, string ffmpegPath, string timestr, string Id, string targetUrl) { try { Task.Run(() => { Task.Delay(DateTime.Now.Second * 500); System.Timers.Timer timer = new System.Timers.Timer(5000); timer.Elapsed += delegate (object sender, System.Timers.ElapsedEventArgs e) { if (System.Diagnostics.Process.GetProcessesByName("ffmpeg").Length < 2) { timer.Enabled = false; System.Diagnostics.Debug.WriteLine(Id + "压缩中..."); this.creTimeStr = timestr; this.rowId = Id; this.compPath = targetUrl; Thread thread = Thread.CurrentThread; Process p = new Process(); p.StartInfo.FileName = ffmpegPath; p.StartInfo.Arguments = para; //执行参数 p.StartInfo.UseShellExecute = false; p.StartInfo.CreateNoWindow = true; p.StartInfo.RedirectStandardInput = true; p.StartInfo.RedirectStandardOutput = true; p.StartInfo.RedirectStandardError = true;//把外部程序错误输出写到StandardError流中 p.ErrorDataReceived += new DataReceivedEventHandler(p_ErrorDataReceived); p.OutputDataReceived += new DataReceivedEventHandler(p_OutputDataReceived); using (p) { p.Start(); p.BeginErrorReadLine();//开始异步读取 p.WaitForExit();//阻塞等待进程结束 string sqlStr = "UPDATE Tbl_File SET File_Path2='" + this.compPath + "',File_State='压缩成功' where ID=" + this.rowId; int count = Common.DataLink.ExecuteSql(sqlStr); if (count <= 0) { Logger.Info("压缩进度完结失败!" + this.rowId); } p.Close();//关闭进程 p.Dispose();//释放资源 } } }; timer.Enabled = true; }); } catch (Exception ex) { Logger.Fatal("进程进程失败!" + ex); } }
点到为止
本文章为转载内容，我们尊重原作者对文章享有的著作权。如有内容错误或侵权问题，欢迎原作者联系我们进行内容更正或删除文章。
