Redirecting stdin and stdout where stdin closes first

Question

This is actually related to another question I had that was already answered. That question is here: Redirecting stdout of one process object to stdin of another

My

Answer 1

For anyone who wants to do something similar, here is the new version with KeeperOfTheSoul's advice applied:

        Process tccatProcess = new Process();           
        tccatProcess.StartInfo.FileName = "tccat";
        tccatProcess.StartInfo.Arguments = String.Format("-i {0} -T {1}", devNode, title);
        tccatProcess.StartInfo.UseShellExecute = false;
        tccatProcess.StartInfo.RedirectStandardOutput = true;

        Process ffmpegProcess = new Process();
        string bashSafePreviewTemplate = slasher.bashSlash(previewTempDir + "/test%03d.jpg");
        ffmpegProcess.StartInfo.FileName = "ffmpeg";
        ffmpegProcess.StartInfo.Arguments = String.Format("-i - -r 1 -t 1 -s {1}x{2} -ss {3} {0}", 
            bashSafePreviewTemplate, width, height, timePosition);
        ffmpegProcess.StartInfo.UseShellExecute = false;
        ffmpegProcess.StartInfo.RedirectStandardInput = true;

        Console.WriteLine("tccat command: {0} {1}", tccatProcess.StartInfo.FileName, tccatProcess.StartInfo.Arguments);
        Console.WriteLine("ffmpeg command: {0} {1}", ffmpegProcess.StartInfo.FileName, ffmpegProcess.StartInfo.Arguments);

        //return true;

        try{
            tccatProcess.Start();
            ffmpegProcess.Start();

            BinaryReader tccatOutput = new BinaryReader(tccatProcess.StandardOutput.BaseStream);
            BinaryWriter ffmpegInput = new BinaryWriter(ffmpegProcess.StandardInput.BaseStream);
            int buffSize = 4096;
            byte[] buff = new byte[buffSize];


            while(!ffmpegProcess.HasExited)
            {
                ffmpegProcess.Refresh();
                buff = tccatOutput.ReadBytes(buffSize);
                ffmpegInput.Write(buff);
                ffmpegInput.Flush();
            }


            tccatProcess.Kill();
            tccatProcess.Close();
            ffmpegProcess.Close();


        }catch(Exception e){
                    //uninteresting log code
                    return false;

        }

Answer 2

Doesn't tccat output binary data since you're working with video and images? If so shouldn't you be reading/writing to the input/output streams directly rather than wrapping them in a text reader?

If so you want to be using Can i put binary in stdin? C#