Processing sketch to send syphon input to ffmpeg

import codeanticode.syphon.*;

import java.io.*;
String ffmpegInstall = "/opt/local/bin/";  // you may need to specify the location that ffmpeg is installed**
String exportFilename = "out.mov";        // MUST INCLUDE EXTENSION (mov, mp4, or see ffmpeg doc for list)
int frameWidth = 1280;                      // size for exported video
int frameHeight = 720;
int fps = 30;                              // frames per second for resulting video
String codec = "mpeg4";
String commandToRun;

PGraphics canvas;
SyphonClient client;

public void setup() {
  size(1280, 720, P3D);

  println("Available Syphon servers:");
  println(SyphonClient.listServers());

  // Create syhpon client to receive frames
  // from the first available running server:
  client = new SyphonClient(this);

  // A Syphon server can be specified by the name of the application that it contains it,
  // its name, or both:

  // Only application name.
  //client = new SyphonClient(this, "SendFrames");

  // Both application and server names
  //client = new SyphonClient(this, "SendFrames", "Processing Syphon");

  // Only server name
  //client = new SyphonClient(this, "", "Processing Syphon");

  // An application can have several servers:
  //client = new SyphonClient(this, "Quartz Composer", "Raw Image");
  //client = new SyphonClient(this, "Quartz Composer", "Scene");

  background(0);
}

public void draw() {
  if (client.available()) {
    canvas = client.getGraphics(canvas);
    image(canvas, 0, 0, width, height);
    saveFrame("/Volumes/tempdisk/frame.tif");
//    commandToRun = ffmpegInstall + "ffmpeg -y -r " + fps + " -i /Volumes/tempdisk/frame.tif -vcodec " + codec + " " + exportFilename;   // command that runs ffmpeg
commandToRun = ffmpegInstall + "ffmpeg -y -r " + fps + " -i /Volumes/tempdisk/frame.tif -vcodec " + codec + " " + "-preset ultrafast -vf setsar=1:1 -q 1 -an -f rawvideo udp://239.0.1.22:1234";
    UnixCommand(commandToRun);
  }
}

void keyPressed() {
  if (key == ' ') {
    client.stop();
  } else if (key == 'd') {
    println(client.getServerName());
  }
}

void UnixCommand(String commandToRun) {
  File workingDir = new File(sketchPath(""));
  String returnedValues;
  try {
    Process p = Runtime.getRuntime().exec(commandToRun, null, workingDir);
    int i = p.waitFor();
    if (i == 0) {
      BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
      while ( (returnedValues = stdInput.readLine ()) != null) {
        // enable this option if you want to get updates when the process succeeds
        // println("  " + returnedValues);
      }
    }
    else {
      BufferedReader stdErr = new BufferedReader(new InputStreamReader(p.getErrorStream()));
      while ( (returnedValues = stdErr.readLine ()) != null) {
        // print information if there is an error or warning (like if a file already exists, etc)
        println("  " + returnedValues);
      }
    }
  }

  // if there is an error, let us know
  catch (Exception e) {
    println("Error, sorry!");
    println("     " + e);
  }
}