import com.sun.image.codec.jpeg.*; 

PImage img;
int numberOfFrames = 600;

void setup() 
{
  size(1024,768); 
}

void draw() 
{
  for(int i =1; i < numberOfFrames ; i++)
  {
    PImage reference = loadImage("sky"+(i-1)+".jpg");
    image(reference,0,0);
    BufferedImage img=new BufferedImage(width, height,  BufferedImage.TYPE_INT_RGB);  
    loadPixels();  
    img.setRGB(0, 0, width, height, g.pixels, 0, width);  
    try{ 
      ByteArrayOutputStream out = new ByteArrayOutputStream(); 
      JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out); 
      JPEGEncodeParam p = encoder.getDefaultJPEGEncodeParam(img); 
      float q = map(i,0,numberOfFrames,1,0);
      p.setQuality(q,true); 
      encoder.setJPEGEncodeParam(p); 
      encoder.encode(img); 
      File file = new File(savePath("data/sky"+i+".jpg")); 
      FileOutputStream fo = new FileOutputStream(file); 
      out.writeTo(fo); 
    } 
    catch(FileNotFoundException e){ 
      System.out.println(e); 
    } 
    catch(IOException ioe){ 
      System.out.println(ioe); 
    }
  }
  exit();
}