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Black screen when trying to stream IP camera in Android

I am developing an android application to monitor some IP cameras. Im using MjpegView Class for video streaming.

I've three cameras.

  • - Camera 1: A public camera that I found on the internet, no user / password.
  • - Camera 2: public camera, but this requires username / password.
  • - Camera 3: The camera that I will be using is finally in my application. It will also ask for credentials.

The code in my main activity is as follows:

public class MainActivity extends Activity {
    private MjpegView mv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //Camera 1
        String URL = "http://216.62.222.101/mjpg/video.mjpg";

        //Camera 2
        // String URL = "http://user:user@iprobocam.marmitek.com/cgi/mjpg/mjpg.cgi";

        //Camera 3
        // String URL = "http://MyIp:MyPort/mjpg/video.mjpg";

        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        mv = new MjpegView(this);
        setContentView(mv);
        mv.setSource(MjpegInputStream.read(URL));
        mv.setDisplayMode(MjpegView.SIZE_BEST_FIT);
        mv.showFps(true);
    }

    public void onPause() {
        super.onPause();
        mv.stopPlayback();
}

I can work with camera 1 without any problems. When I launch the app with cameras 2 or 3, there are no errors, no warning, but I get a black screen. I figured it was an authentication issue, but if I remove it from my camera, I get the same result, black screen.

What is the difference between cameras that make some of them work but not others?

Thanks in advance for your help.

--- EDIT ---

I found something strange while running my camera app 2. I am throwing an exception in the class MjpegView

when it calls a method MjpegInputStream.readMjpegFrame

. Looking deeper, I notice that the method getEndOfSeqeunce

always returns 1, while camera 1 (the one that works well) returns higher values ​​(between 66 and 68).

Hopefully this can give someone an idea of ​​what is going on here ...

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2 answers


Finally I solved it!

I don't know why it didn't work the first time I tried to transfer this camera by removing the authentication. But today I tried again and now it works.

So now the problem was with authentication. Can't add credentials to url like in browser.



I just changed MjpegInputStream

to set credentials to HTTPClient

:

DefaultHttpClient httpclient = new DefaultHttpClient();
httpclient.getCredentialsProvider().setCredentials(new AuthScope(host, AuthScope.ANY_PORT), new UsernamePasswordCredentials(username, password));
res = httpclient.execute(new HttpGet(URI.create(url)));

And yes finally it works

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This also works if you don't want to enter the hostname.



CredentialsProvider provider = new BasicCredentialsProvider();
UsernamePasswordCredentials credentials = new UsernamePasswordCredentials("username", "password");
provider.setCredentials(AuthScope.ANY, credentials);
DefaultHttpClient httpclient = new DefaultHttpClient();
httpclient.setCredentialsProvider(provider);
res = httpclient.execute(new HttpGet(URI.create(url)));
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