Bonjour, j'aimerais pour un projet récupérer le flux video d'une camera IP et l'afficher (dans un jFrame par exemple). Apres avoir parcouru environ une centaine de pages je ne trouve pas de tutoriel qui explique la démarche qu'il faut suivre. Le seul code qui revient assez souvent est à la fin de mon messsage. Seulement quand je le teste j'ai un nullPointerException au moment de la récupération du flux, il y a vraiment quelque chose qui m'échappe. Si quelqu'un peut m'aider à comprendre(tuto, code qui marche,....) je serai vraiment reconnaissante je commence à m'approcher du deadline
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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 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 AxisCamera1 extends JPanel implements Runnable
{
    public boolean useMJPGStream = true; //still image set to false
    //streaming set to true
    public String jpgURL="http://192.168.0.36/axis-cgi/jpg/image.cgi?resolution=352x288";
    public String mjpgURL="http://192.168.0.36/mjpg/video.mjpg";//"http://192.168.1.198/mjpg/video.mjpg";
    DataInputStream dis;
    private BufferedImage image=null;
    int counter=0;
 
    public Dimension imageSize = null;
    public boolean connected = false;
    private boolean initCompleted = false;
    HttpURLConnection huc=null;
    Component parent;
 
    /** Creates a new instance of AxisCamera1 */
    public AxisCamera1(Component parent_) {
    parent = parent_;
    }
 
    public static Image getScaledInstanceAWT(BufferedImage source, double factor) {
    int w = (int) (source.getWidth() * factor);
    int h = (int) (source.getHeight() * factor);
    return source.getScaledInstance(w, h, Image.SCALE_SMOOTH);
    }
 
    public static BufferedImage toBufferedImage(Image image) {
    new ImageIcon(image); //load image
    int w = image.getWidth(null);
    int h = image.getHeight(null);
    BufferedImage bimage = new BufferedImage(w, h, BufferedImage.TYPE_BYTE_INDEXED);
    //BufferedImage bimage = getDefaultConfiguration().createCompatibleImage(w, h, Transparency.OPAQUE);
    Graphics2D g = bimage.createGraphics();
    g.drawImage(image, 0, 0, null);
    g.dispose();
    return bimage;
    }
 
    public void connect()
    {
        try
        {
            URL u = new URL(useMJPGStream?mjpgURL:jpgURL);
            huc = (HttpURLConnection) u.openConnection();
            //System.out.println("huc="+huc);
            System.out.println(huc.getInputStream());
            InputStream is = huc.getInputStream();
            //System.out.println("is="+is);
            connected = true;
            BufferedInputStream bis = new BufferedInputStream(is);
            //System.out.println("bis="+bis);
            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(4,dis); //discard the first 3 lines
    readJPG();
    readLine(1,dis); //discard the last two lines
    }
 
    public void readJPG(){ //read the embedded jpeg image
    try{
    JPEGImageDecoder decoder = JPEGCodec.createJPEGDecoder(dis);
    image = decoder.decodeAsBufferedImage();
 
    String s="a"+counter+".jpg";
    counter++;
    String filename="c:\\find_stillset\\"+s;
    System.out.println(filename);
 
    BufferedImage smaller = toBufferedImage(getScaledInstanceAWT(image, 1.0/3.0));//scalling image size
 
    try {
    OutputStream out = new FileOutputStream(filename);
    JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
    encoder.encode(smaller);
    out.close();
    } catch (Exception e) {
    System.out.println(e);
    }
 
    }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() {
        System.out.println("in Run...................");
        connect();
        readStream();
    }
 
    public static void main(String[] args) {
 
        //System.setProperty("http.proxyHost","proxy.tp.edu.sg");
    //    System.setProperty("http.proxyPort","80");
    JFrame jframe = new JFrame();
    jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    AxisCamera1 axPanel = new AxisCamera1(jframe);
    new Thread(axPanel).start();
    jframe.getContentPane().add(axPanel);
    jframe.pack();
    jframe.show();
    }
 
}