c# ffmpeg视频转换

c# ffmpeg视频转换

什么是ffmpeg，它有什么作用呢，怎么可以使用它呢，带着问题去找答案吧！先参考百度百科把，我觉得它很强大无奇不有，为了方便大家我就把链接提供了！

http://baike.baidu.com/link?url=bD4xX59DgppfdclpyGfmC38WTeEkOTM9yc35XGi4OLnQYY7BqmPJSIZHyPKp0imUdI2yujK76Nm047ACZW2hHa

今天工作中遇到这么个问题，这个问题很屌，我通过搜索引擎找了个遍，几乎没有找到理想的答案，于是被逼无奈之下，自己研究参数，于是就有了如下的成就，所以，遇到问题不要害怕，这才是成长最快的时刻。当问题解决了的时候，会有种无比的成就感，把自己的成果分享给他人，供他人参考，这也是种喜悦！

------------没有做不到的，只有想不到的。

转码进度公式=当前时间/总时间*100%；

   public class FFmpeg

     {

         static int timeCount;

         public static void Execute()

         {

             Process p = new Process();

             p.StartInfo.FileName = @"E:\张立平资料\Demo\FFmpeg_Demo\ffmpeg\ffmpeg.exe";

             p.StartInfo.UseShellExecute = false;

             string srcFileName = @"E:\张立平资料\Demo\FFmpeg_Demo\videoold\test.mov";

             string destFileName = @"E:\张立平资料\Demo\FFmpeg_Demo\videonew\test.mp4";

             p.StartInfo.Arguments = "-i " + srcFileName + " -y -ab 56 -ar 22050 -b 800 -r 29.97 -s 420x340 " + destFileName;    //执行参数

             //-i D:/vts-collector/test/swap/7a3c9800-2e2f-42fe-ba39-56b25f972e06.mov -y -ab 56 -ar 22050 -b 800 -r 29.97 -s 420x340 D:/vts-collector/test/swap/7a3c9800-2e2f-42fe-ba39-56b25f972e06_mov_stream.mp4

             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

                 p.Close();//关闭进程

             }

         }

         private static void p_ErrorDataReceived(object sender, DataReceivedEventArgs e)

         {

             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 + , indexOfEnd - indexOfBegin - );

                     timeCount =ConvertStringtoSecond(duration);

                 }

                 if (output.Contains("time="))

                 {

                     Int32 indexOfTime = output.IndexOf("time=");

                     Int32 indexOfBegin = output.IndexOf("=", indexOfTime);

                     Int32 indexOfEnd = output.IndexOf("bitrate", indexOfBegin);

                     string timeStr = output.Substring(indexOfBegin + , indexOfEnd - indexOfBegin - );

                     var time =Convert.ToDouble(timeStr);

                     var process = time / timeCount*;

                     process = Math.Round(process);

                     Console.Write("{0}% ", process);

                 }

                 //Console.WriteLine(e.Data);

             }

         }

         private static int ConvertStringtoSecond(string input)

         {

             int totalSecond = ;

             try

             {

                 string[] split = input.Split(new char[] { ':', '.' });

                 int hour = int.Parse(split[]) * ;

                 int min = int.Parse(split[]) * ;

                 int second = int.Parse(split[]);

                 int millisecond = int.Parse(split[]) / ;

                 totalSecond = hour + min + second + millisecond;

             }

             catch (System.Exception ex)

             {

                 Console.Write(ex.Message);

             }

             return totalSecond;

         }

         private static void p_OutputDataReceived(object sender, DataReceivedEventArgs e)

         {

             Console.WriteLine(e.Data);

         }

     }

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c# ffmpeg视频转换

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