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Thread: how to send video from sockets

  1. #1
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    Question how to send video from sockets

    Hi ,
    I am using webcam-capture api in order to connect with webcam.
    How i can send the webcam from sockets live streaming from server to client.


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    Default Re: how to send video from sockets

    anyone please reply provide me reference , tutorials etc

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    Default Re: how to send video from sockets

    What code do you have now? Can you write and read data over a socket?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: how to send video from sockets

    ...and commenting in the chat box that this forum sucks is not doing you any favors.

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    Default Re: how to send video from sockets

    Quote Originally Posted by Norm View Post
    What code do you have now? Can you write and read data over a socket?
    Yes im writing and reading from sockets.
    Im using webcam-capture API for it.
    Following is my code for server sending webcam. When following server thread run it opens webcam panel and show webcam live video. I write this object to client. Following is the server code :
     public void run(){
     
            if(cam!=null){
                try{
                System.out.println("Prepared to write");
                //cam= Webcam.getDefault();
     
     
                WebcamPanel pnl = new WebcamPanel(cam);
                JFrame j= new JFrame();
                j.add(pnl);
                j.setVisible(true);
                //byte[] by = (byte)cam;
                try{
                    while(true){ 
                        System.out.println("Starting writing...");
                   // wr = new BufferedWriter(new OutputStreamWriter(clientSocket.getOutputStream()));
                    //wr.write("abc");
                    //wr.write('\n');
                    //wr.flush();
                        objwr= new ObjectOutputStream(clientSocket.getOutputStream());
                       //wr = new BufferedWriter(objwr);
                        objwr.writeObject(cam);
                           }
     
                }
                catch (Exception ex){
                    throw new InterruptedException(ex.getMessage());
                }
                finally{
                    try{
                        if(wr!=null)
                            {
                                wr.close();
                            }
                            if(objwr!=null)
                            {
                                objwr.close();
                            }
                        }
                        catch(Exception ex3){
                            throw new InterruptedException(ex3.getMessage());
                        }
                }
     
     
     
     
                //Thread.sleep(0);
                }
                catch(InterruptedException ex)
                {
                    throw new RuntimeException(ex.getMessage());
                }
     
            }
     
     
     
        }


    Following is the client code :

    @Override
        public void run(){
            try{
     
                boolean fl=true;
                //cam.open();
                WebcamPanel pnl; 
                //JFrame j= new JFrame();
                //j.add(pnl);
                //j.setVisible(true);
     
                    try{
     
                        objin= new ObjectInputStream(serverSocket.getInputStream());
                           while(true){
                               if(fl)
                               { System.out.println("Setting for 1st time");
                                   cam = (Webcam)objin.readObject();
                                   pnl = new WebcamPanel(cam);
                                   JFrame j= new JFrame();
                                   j.add(pnl);
                                   j.setVisible(true);
     
                               }
                               else {
                                   System.out.println("for 2nd time");
                                   cam = (Webcam)objin.readObject();
     
                               }
     
     
     
     
                           }
     
                        //System.out.println("Reading video");
                        //BufferedReader rdr= new BufferedReader( new InputStreamReader(serverSocket.getInputStream()));
                        //System.out.println(rdr.readLine());
     
     
                    }
                    catch(Exception ex1){
                        throw new InterruptedException(ex1.getMessage());
                    }
     
                    finally{
                        try{
                            if(objin!=null)
                            {
                                objin.close();
                            }
                        }
                        catch(Exception ex3){
                            throw new InterruptedException(ex3.getMessage());
                        }
     
                    }
     
     
            }
            catch(InterruptedException ex){
                throw new RuntimeException(ex.getMessage());
            }
     
     
        }




    And im getting this error while reading from client side

    Exception in thread "Thread-0" java.lang.RuntimeException: writing aborted; java.io.NotSerializableException: com.github.sarxos.webcam.Webcam
    at VideoClient.TCameraReader.run(TCameraReader.java:9 3)

    and in server side :
    Exception in thread "Thread-3" java.lang.RuntimeException: com.github.sarxos.webcam.Webcam
    at VideoServer.TCameraWriter.run(TCameraWriter.java:9 0)

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    Default Re: how to send video from sockets

    Exception in thread "Thread-0" java.lang.RuntimeException: writing aborted; java.io.NotSerializableException:
    Read the API for the methods you are using:
    docs.oracle.com/javase/6/docs/api/java/io/ObjectOutputStream.html
    You haven't posted the appropriate code for anyone to say that the object you are writing is Serializable.

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    Default Re: how to send video from sockets

    Quote Originally Posted by copeg View Post
    Read the API for the methods you are using:
    docs.oracle.com/javase/6/docs/api/java/io/ObjectOutputStream.html
    You haven't posted the appropriate code for anyone to say that the object you are writing is Serializable.
    In this API there is not any thing written for sending in streams.
    I used cam object which is object of Webcam class which is used in API
    Can you please tell me any other API which can be used for sending cam via sockets.

    Thanks

  8. #8
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    Default Re: how to send video from sockets

    used for sending cam
    What do you mean by "cam"?
    How are bytes of data obtained from "cam" that they can be sent to another program via sockets? Often that is down by reading from an output stream provided by a method in the class.
    If you don't understand my answer, don't ignore it, ask a question.

  9. #9
    Administrator copeg's Avatar
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    Default Re: how to send video from sockets

    Quote Originally Posted by shanalikhan View Post
    In this API there is not any thing written for sending in streams.
    I used cam object which is object of Webcam class which is used in API
    Can you please tell me any other API which can be used for sending cam via sockets.

    Thanks
    You posted a NotSerializableException was thrown. The code you posted attempts to Serialize an object. If you read the API for the method writeObject, you would find the following:
    NotSerializableException - Some object to be serialized does not implement the java.io.Serializable interface.
    So whatever it is you are trying to serialize in your current code - whatever 'Webcam' class is, it does not implement Serailizable.

    Given I don't fully understand your problem beyond that, that is as much information as I can provide.

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