无论如何，重定向生成的进程的标准输出并将其捕获为它的发生。我看到的所有内容在完成后都会执行ReadToEnd。我希望能够在打印时获得输出。
编辑：
private void ConvertToMPEG()
{
// Start the child process.
Process p = new Process();
// Redirect the output stream of the child process.
p.StartInfo.UseShellExecute = false;
p.StartInfo.RedirectStandardOutput = true;
//Setup filename and arguments
p.StartInfo.Arguments = String.Format("-y -i \"{0}\" -target ntsc-dvd -sameq -s 720x480 \"{1}\"", tempDir + "out.avi", tempDir + "out.mpg");
p.StartInfo.FileName = "ffmpeg.exe";
//Handle data received
p.OutputDataReceived += new DataReceivedEventHandler(p_OutputDataReceived);
p.Start();
}
void p_OutputDataReceived(object sender, DataReceivedEventArgs e)
{
Debug.WriteLine(e.Data);
}
使用 Process.OutputDataReceived 来自流程的事件，以接收您需要的数据。
例：
var myProc= new Process();
...
myProc.StartInfo.RedirectStandardOutput = true;
myProc.OutputDataReceived += new DataReceivedEventHandler(MyProcOutputHandler);
...
private static void MyProcOutputHandler(object sendingProcess,
DataReceivedEventArgs outLine)
{
// Collect the sort command output.
if (!String.IsNullOrEmpty(outLine.Data))
{
....
}
}
使用 Process.OutputDataReceived 来自流程的事件，以接收您需要的数据。
例：
var myProc= new Process();
...
myProc.StartInfo.RedirectStandardOutput = true;
myProc.OutputDataReceived += new DataReceivedEventHandler(MyProcOutputHandler);
...
private static void MyProcOutputHandler(object sendingProcess,
DataReceivedEventArgs outLine)
{
// Collect the sort command output.
if (!String.IsNullOrEmpty(outLine.Data))
{
....
}
}
因此，经过一点挖掘，我发现ffmpeg使用stderr进行输出。这是我修改后的代码来获取输出。
Process p = new Process();
p.StartInfo.UseShellExecute = false;
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.RedirectStandardError = true;
p.StartInfo.Arguments = String.Format("-y -i \"{0}\" -target ntsc-dvd -sameq -s 720x480 \"{1}\"", tempDir + "out.avi", tempDir + "out.mpg");
p.StartInfo.FileName = "ffmpeg.exe";
p.ErrorDataReceived += new DataReceivedEventHandler(p_ErrorDataReceived);
p.OutputDataReceived += new DataReceivedEventHandler(p_OutputDataReceived);
p.Start();
p.BeginErrorReadLine();
p.WaitForExit();