--- /Users/sgaspari/ownCloud/JavaCameraView.java	2015-01-31 14:34:27.000000000 +0100
+++ sdk/java/src/org/opencv/android/JavaCameraView.java	2015-01-31 14:04:52.000000000 +0100
@@ -40,6 +40,8 @@
     protected Camera mCamera;
     protected JavaCameraFrame[] mCameraFrame;
     private SurfaceTexture mSurfaceTexture;
+    
+private int previewFormat = ImageFormat.NV21;
 
     public static class JavaCameraSizeAccessor implements ListItemAccessor {
 
@@ -143,6 +145,10 @@
                     Size frameSize = calculateCameraFrameSize(sizes, new JavaCameraSizeAccessor(), width, height);
 
                     params.setPreviewFormat(ImageFormat.NV21);
+    // "generic" = android emulator
+    if (Build.BRAND.equalsIgnoreCase("generic") || Build.BRAND.equalsIgnoreCase("android") || Build.BRAND.equalsIgnoreCase("generic_x86_64"))
+    {
+        params.setPreviewFormat(ImageFormat.YV12);
+    }
                     Log.d(TAG, "Set preview size to " + Integer.valueOf((int)frameSize.width) + "x" + Integer.valueOf((int)frameSize.height));
                     params.setPreviewSize((int)frameSize.width, (int)frameSize.height);
 
@@ -157,6 +163,7 @@
 
                     mCamera.setParameters(params);
                     params = mCamera.getParameters();
+    previewFormat = params.getPreviewFormat();
 
                     mFrameWidth = params.getPreviewSize().width;
                     mFrameHeight = params.getPreviewSize().height;
@@ -288,8 +295,15 @@
         }
 
         public Mat rgba() {
-            Imgproc.cvtColor(mYuvFrameData, mRgba, Imgproc.COLOR_YUV2RGBA_NV21, 4);
-            return mRgba;
+//            Imgproc.cvtColor(mYuvFrameData, mRgba, Imgproc.COLOR_YUV2RGBA_NV21, 4);
+//            return mRgba;
+if (previewFormat == ImageFormat.NV21) {
+    Imgproc.cvtColor(mYuvFrameData, mRgba, Imgproc.COLOR_YUV2RGBA_NV21, 4);
+}
+else if (previewFormat == ImageFormat.YV12) {
+    Imgproc.cvtColor(mYuvFrameData, mRgba, Imgproc.COLOR_YUV2RGB_I420, 4);  // COLOR_YUV2RGBA_YV12 produces inverted colors
+}
+return mRgba;
         }
 
         public JavaCameraFrame(Mat Yuv420sp, int width, int height) {