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Thread: retrieve the video stream from an Axis camera

  1. #1
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    Default retrieve the video stream from an Axis camera

    hi everyone,
    i'm a new member of this forum..i'm trying to retrieve the video stream from my Axis camera..i don't know what's exactly the problem:when i run the project there's no errors but i get no video on my jFrame..
    this is my code,can you please help me to know where the problem is?
    thanks..


    import java.net*;
    import com.sun.image.codec.jpeg*;
    import java.io*;
    import java.awt*;
    import java.awt.event*;
    import java.awt.image*;
    import javax.swing*;
     
     
    public class AxisCamera extends JPanel implements Runnable {
    public boolean useMJPGStream = true;
    public String jpgURL="http://your-ip-here/axis-cgi/jpg/image.cgi?resolution=352x240";
    public String mjpgURL="http://your-ip-here/axis-cgi/mjpg/video.cgi?resolution=352x240";
    DataInputStream dis;
    private Image image=null;
    public Dimension imageSize = null;
    public boolean connected = false;
    private boolean initCompleted = false;
    HttpURLConnection huc=null;
    Component parent;
     
    /** Creates a new instance of AxisCamera */
    public AxisCamera (Component parent_) {
    parent = parent_;
    }
     
    public void connect(){
    try{
    URL u = new URL(useMJPGStream?mjpgURL:jpgURL);
    huc = (HttpURLConnection) u.openConnection();
     
     
     
     
     
     
     
    //System.out.println(huc.getContentType());
    InputStream is = huc.getInputStream();
    connected = true;
    BufferedInputStream bis = new BufferedInputStream(is);
    dis= new DataInputStream(bis);
    if (!initCompleted) initDisplay();
    }catch(IOException e){ //incase no connection exists wait and try again, instead of printing the error
    try{
    huc.disconnect();
    Thread.sleep(60);
    }catch(InterruptedException ie){huc.disconnect();connect();}
    connect();
    }catch(Exception e){;}
    }
     
    public void initDisplay(){ //setup the display
    if (useMJPGStream)readMJPGStream();
    else {readJPG();disconnect();}
    imageSize = new Dimension(image.getWidth(this), image.getHeight(this));
    setPreferredSize(imageSize);
    parent.setSize(imageSize);
    parent.validate();
    initCompleted = true;
    }
     
    public void disconnect(){
    try{
    if(connected){
    dis.close();
    connected = false;
    }
    }catch(Exception e){;}
    }
     
    public void paint(Graphics g) { //used to set the image on the panel
    if (image != null)
    g.drawImage(image, 0, 0, this);
    }
     
    public void readStream(){ //the basic method to continuously read the stream
    try{
    if (useMJPGStream){
    while(true){
    readMJPGStream();
    parent.repaint();
    }
    }
    else{
    while(true){
    connect();
    readJPG();
    parent.repaint();
    disconnect();
     
    }
    }
     
    }catch(Exception e){;}
    }
     
     
    public void readMJPGStream(){ //preprocess the mjpg stream to remove the mjpg encapsulation
    readLine(3,dis); //discard the first 3 lines
    readJPG();
    readLine(2,dis); //discard the last two lines
    }
     
    public void readJPG(){ //read the embedded jpeg image
    try{
    JPEGImageDecoder decoder = JPEGCodec.createJPEGDecoder(dis);
    image = decoder.decodeAsBufferedImage();
    }catch(Exception e){e.printStackTrace();disconnect();}
    }
     
    public void readLine(int n, DataInputStream dis){ //used to strip out the header lines
    for (int i=0; i<n;i++){
    readLine(dis);
    }
    }
    public void readLine(DataInputStream dis){
    try{
    boolean end = false;
    String lineEnd = "\n"; //assumes that the end of the line is marked with this
    byte[] lineEndBytes = lineEnd.getBytes();
    byte[] byteBuf = new byte[lineEndBytes.length];
     
    while(!end){
    dis.read(byteBuf,0,lineEndBytes.length);
    String t = new String(byteBuf);
    //System.out.print(t); //uncomment if you want to see what the lines actually look like
    if(t.equals(lineEnd)) end=true;
    }
    }catch(Exception e){e.printStackTrace();}
     
     
    }
    public void run() {
    connect();
    readStream();
    }
     
     
    public static void main(String[] args) {
    JFrame jframe = new JFrame();
    jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    AxisCamera axPanel = new AxisCamera(jframe);
    new Thread(axPanel).start();
    jframe.getContentPane().add(axPanel);
    jframe.pack();
    jframe.show();
    }
     
     
    }
    Last edited by helloworld922; April 3rd, 2010 at 10:28 AM.


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