我的系统包括数字视频记录器（DVR）和两个摄像机，它们与DVR连接的。硬盘录像机可以作为服务器也（连接到LAN）。在体系中包含一个Android应用程序，在这里我把信息有关服务器，端口，用户名和密码（我可以添加使用服务器软件帐户）。该应用程序从相机传输视频。我还可以与DVR通过HTTP（仅适用于IE浏览器）连接，然后将其显示ActiveX应用程序。

My system consists of a digital video recorder (dvr) and two cameras, which are connected with dvr. The dvr works as server also (connected to LAN). To the system was included an android application, where I put info about server, port, user name and password (I can add accounts using server software). The application streams video from cameras. I can also connect with dvr via http (only IE), then it show activeX application.

什么我做的是写的类似的应用程序，但我还是坚持了一个问题 - 我怎么能获取来自DVR的视频流？我与Java方面的专家，并试图跟硬盘录像机，没有成功。

What I'm to do is write similar application, but I stuck into a problem - how can I fetch the video stream from dvr? I'm no expert with Java and tried connect with dvr, unsuccessfully.

下面是我的code：

import java.net.*;
import java.io.*;

public class VideoStream
{

final static int BUFFER_SIZE = 1024000;
public static void main(String[] args) throws Exception 
{
    Authenticator.setDefault(new Authenticator()
    {
        protected  PasswordAuthentication  getPasswordAuthentication()
        {
            System.out.println("Authenticatting...");
            PasswordAuthentication p=new PasswordAuthentication("login", "password".toCharArray());
        return p;       
        }
    });
    Socket s = new Socket();
    String host = "192.168.80.107"; //192.168.80.107
    PrintWriter s_out = null;
    BufferedReader s_in = null;
    BufferedInputStream bufferedInputStream = null;

    try
    {
        s.connect(new InetSocketAddress(host, 34599));
        System.out.println("Is connected? : " + s.isConnected());

        s_out = new PrintWriter(s.getOutputStream(), true);
        s_in = new BufferedReader(new InputStreamReader(s.getInputStream()));
        //bufferedInputStream = new BufferedInputStream(s.getInputStream());
    }
    catch(UnknownHostException e)
    {
        e.printStackTrace();
        System.exit(1);
    }
    catch(Exception e)
    {
        e.printStackTrace();
        System.exit(1);
    }

    byte[] b = new byte[BUFFER_SIZE];
    //bufferedInputStream.read(b);

    int bytesRead = 0;
    System.out.println("Reading... \n");
    while((bytesRead = s_in.read()) > 0)
    {
        System.out.println(s_in.readLine());
    }
    System.out.println("Done");
}

我尝试了不同的端口（TCP和包括Android应用程序）。套接字与服务器连接，但它挂起当我尝试使用read（）方法（甚至退出while循环）。验证器不工作了。

I tried different port (TCP and for included android app). The socket connect with the server, but it "hangs" when I try to use read() method (even out of while loop). Authenticator don't work too.

有关DVR一些信息：

我会非常非常的AP preciate任何建议。

I will much appreciate any advices.

推荐答案

正如其他人在评论中指出，该意见是知道如何对现有的Andr​​oid应用程序的工作。

As others noted in the comments, the advice is to know how the existing Android application works.

这可能是值得尝试检查数据包和回复（与像的关于Android客户端和DVR之间的通信鲨鱼的Droid的）。

It may be worth trying to inspect packets and replies (captured with a sniffer like Shark for Droid) concerning the communications between the Android client and the DVR.