FFmpeg FFmpeg的使用及常用参数

 1  class Program
 2     {
 3         static void Main(string[] args)
 4         {
 5             string srcFileName = @"F:\资料\Demo\FFmpeg_Demo\videoold\PROMO.wmv";
 6             string destFileName = @"F:\资料\Demo\FFmpeg_Demo\videonew\PROMO.mp4";
 7 
 8             Process p = new Process();
 9             p.StartInfo.FileName = @"F:\资料\Demo\FFmpeg_Demo\mencoder\ffmpeg.exe";
10             p.StartInfo.UseShellExecute = false;
11 
12            p.StartInfo.Arguments = "-i " + srcFileName + GenerateDefaultSetting() + destFileName;
13 
14 
15             p.StartInfo.RedirectStandardInput = true;
16             p.StartInfo.RedirectStandardOutput = true;
17             p.StartInfo.RedirectStandardError = true;//把外部程序错误输出写到StandardError流中
18             p.ErrorDataReceived += new DataReceivedEventHandler(p_ErrorDataReceived);
19             p.OutputDataReceived += new DataReceivedEventHandler(p_OutputDataReceived);
20             p.Start();
21             p.BeginErrorReadLine();//开始异步读取
22             p.WaitForExit();//阻塞等待进程结束
23             p.Close();//关闭进程
24             p.Dispose();//释放资源
25             Console.WriteLine("ok");
26             Console.ReadKey();
27         }
28         private static void p_ErrorDataReceived(object sender, DataReceivedEventArgs e)
29         {
30             Console.WriteLine(e.Data);
31         }
32         private static void p_OutputDataReceived(object sender, DataReceivedEventArgs e)
33         {
34             Console.WriteLine(e.Data);
35         }
36 
37         private static string GenerateDefaultSetting()
38         {
39             string setting = string.Empty;
40             setting += " -y ";
41             //setting += " -b 800 ";//-b大于0就模糊【？】
42             setting += " -ab 56 ";
43             setting += " -ar 22050 ";
44             setting += " -qscale 4 ";
45             setting += " -r " + 29.970;
46             setting += " -ac 2 ";
47             setting += " -s " + 640 + "x" + 480 + " ";
48             return setting;
49         }
50     }