C# process FFMPEG output from standard out (pipe) [duplicate]

I want to extract the current image from the FFMPEG standard output and show it on a C# form. The stream source itself is a h264 raw data which converted into image and piped to the standard output. Here is my code, but I have no idea how to process the output (maybe MemoryStream):

public Process ffproc = new Process();
private void xxxFFplay()
{ ffproc.StartInfo.FileName = "ffmpeg.exe"; ffproc.StartInfo.Arguments = "-y -i udp://127.0.0.1:8888/ -q:v 1 -huffman optimal -update 1 -f mjpeg -"; ffproc.StartInfo.CreateNoWindow = true; ffproc.StartInfo.RedirectStandardOutput = true; ffproc.StartInfo.UseShellExecute = false; ffproc.EnableRaisingEvents = true; ffproc.OutputDataReceived += (o, e) => Debug.WriteLine(e.Data ?? "NULL", "ffplay"); fproc.ErrorDataReceived += (o, e) => Debug.WriteLine(e.Data ?? "NULL", "ffplay"); ffproc.Exited += (o, e) => Debug.WriteLine("Exited", "ffplay"); ffproc.Start(); worker = new BackgroundWorker(); worker.DoWork += worker_DoWork; worker.WorkerReportsProgress = true; worker.ProgressChanged += worker_ProgressChanged; worker.RunWorkerAsync();
} public void worker_DoWork(object sender, DoWorkEventArgs e)
{ try { var internalWorker = sender as BackgroundWorker; Process p = e.Argument as Process; buffer = new MemoryStream(); bufferWriter = new BinaryWriter(buffer); using (var reader = new BinaryReader(p.StandardOutput.BaseStream)) { while (true) { bufferWriter.Write(1); var img = (Bitmap)Image.FromStream(buffer); pictureBox1.Image = img; //get the jpg image } } } catch (Exception ex) { // Log the error, continue processing the live stream } }

Any help would be appreciated!