title: OpenCV 2.3: how to capture frames from Android camera?
body: <p>I'm trying to use new OpenCV feature on Android: native camera access. According to <a href="http://opencv.willowgarage.com/wiki/Android2.3.0#NativecamerasupportinOpenCV" rel="nofollow">this</a> document, it's quite easy, but I only get the error without success.</p>
  
  <p>There is DDMS log:</p>
  
  <blockquote>
    <p>08-26 03:28:56.825: DEBUG/CAMERA_ACTIVITY(12613): Library name: libopencv_java.so
    08-26 03:28:56.825: DEBUG/CAMERA_ACTIVITY(12613): Library base address: 0x81800000
    08-26 03:28:56.835: DEBUG/CAMERA_ACTIVITY(12613): Libraries folder found: /data/data/com.viactivity.ar/lib/
    08-26 03:28:56.835: DEBUG/CAMERA_ACTIVITY(12613): CameraWrapperConnector::connectToLib: folderPath=/data/data/com.viactivity.ar/lib/
    08-26 03:28:56.835: ERROR/CAMERA_ACTIVITY(12613): ||libnative_camera_r2.2.2.so
    08-26 03:28:56.835: ERROR/CAMERA_ACTIVITY(12613): ||libnative_camera_r2.3.3.so
    08-26 03:28:56.835: DEBUG/CAMERA_ACTIVITY(12613): try to load library 'libnative_camera_r2.2.2.so'
    08-26 03:28:56.835: DEBUG/CAMERA_ACTIVITY(12613): CameraWrapperConnector::connectToLib ERROR: cannot dlopen camera wrapper library /data/data/com.viactivity.ar/lib/libnative_camera_r2.2.2.so, dlerror="Cannot load library: find_library[1223]: 11258 'libnative_camera_r2.2.2.so' failed to load previously"
    08-26 03:28:56.835: DEBUG/CAMERA_ACTIVITY(12613): try to load library 'libnative_camera_r2.3.3.so'
    08-26 03:28:56.835: DEBUG/CAMERA_ACTIVITY(12613): CameraWrapperConnector::connectToLib ERROR: cannot dlopen camera wrapper library /data/data/com.viactivity.ar/lib/libnative_camera_r2.3.3.so, dlerror="Cannot load library: find_library[1223]: 11258 'libnative_camera_r2.3.3.so' failed to load previously"
    08-26 03:28:56.835: ERROR/CAMERA_ACTIVITY(12613): CameraWrapperConnector::connectToLib ERROR: cannot dlopen camera wrapper library
    08-26 03:28:56.835: ERROR/CV_CAP(12613): Native_camera returned opening error: 4
    08-26 03:28:56.835: ERROR/AR_code(12613): Capture Error!</p>
  </blockquote>
  
  <p>There are two variants of code:</p>
  
  <pre><code>CvCapture* capture = cvCaptureFromCAM( CV_CAP_ANDROID + 0 ); 
  IplImage* frame = cvQueryFrame( capture );
  cvReleaseCapture(&amp;capture);
  </code></pre>
  
  <p>.</p>
  
  <pre><code>cv::VideoCapture capture(CV_CAP_ANDROID + 0);
  cv::Mat frame;
  
  capture &gt;&gt; frame;
  </code></pre>
  
  <p>Both of them produce the same errors.
  Does somebody was able to get native camera access on Android? 
  Thanks a lot!</p>
  
  <p><strong>UPD:</strong> 
  The story above is about Android 3.2. According to the words of  Andrey Kamaev, Android 3.2 isn't supported.
  I tried to test the same code on HTC Wildfire, but got another error:</p>
  
  <blockquote>
    <p>08-26 19:49:06.856: DEBUG/OpenCV_NativeCamera(1337):
    CameraHandler::initCameraConnect(0x813e65a1, 0, 0x285a20, 0x0) 08-26
    19:49:06.856: DEBUG/CameraService(72): CameraService::connect E (pid
    1337, client 0x693d8) 08-26 19:49:06.856: DEBUG/CameraService(72):
    CameraService::connect X (pid 1337, new client 0x693d8) rejected. (old
    pid 1337, old client 0x18728) 08-26 19:49:06.856:
    ERROR/OpenCV_NativeCamera(1337): initCameraConnect: Unable to connect
    to CameraService 08-26 19:49:06.856: ERROR/CAMERA_ACTIVITY(1337):
    CameraWrapperConnector::connectWrapper ERROR: the initializing
    function returned false 08-26 19:49:06.856: ERROR/CV_CAP(1337):
    Native_camera returned opening error: 6</p>
  </blockquote>
  
  <p>Any ideas?</p>