diff --git a/library/src/main/api14/com/google/android/cameraview/Camera1.java b/library/src/main/api14/com/google/android/cameraview/Camera1.java
index 256326e9..8c571fe7 100644
--- a/library/src/main/api14/com/google/android/cameraview/Camera1.java
+++ b/library/src/main/api14/com/google/android/cameraview/Camera1.java
@@ -358,9 +358,13 @@ void adjustCameraParameters() {
         }
         Size size = chooseOptimalSize(sizes);
 
-        // Always re-apply camera parameters
-        // Largest picture size in this ratio
-        final Size pictureSize = mPictureSizes.sizes(mAspectRatio).last();
+        final Size pictureSize;
+        if (mPictureSizes.sizes(mAspectRatio) == null) {
+            pictureSize = size;
+        } else {
+            // Largest picture size in this ratio
+            pictureSize = mPictureSizes.sizes(mAspectRatio).last();
+        }
         if (mShowingPreview) {
             mCamera.stopPreview();
         }
diff --git a/library/src/main/api21/com/google/android/cameraview/Camera2.java b/library/src/main/api21/com/google/android/cameraview/Camera2.java
index 554a369b..58667ae2 100644
--- a/library/src/main/api21/com/google/android/cameraview/Camera2.java
+++ b/library/src/main/api21/com/google/android/cameraview/Camera2.java
@@ -213,9 +213,14 @@ boolean start() {
         if (!chooseCameraIdByFacing()) {
             return false;
         }
-        collectCameraInfo();
-        prepareImageReader();
-        startOpeningCamera();
+        try {
+            collectCameraInfo();
+            prepareImageReader();
+            startOpeningCamera();
+        } catch(Exception e) {
+            Log.e(TAG, "Failed to start camera2", e);
+            mCallback.onCameraError(e);
+        }
         return true;
     }
 
@@ -345,7 +350,10 @@ void takePicture() {
             try {
                 lockFocus();
             } catch (Exception e) {
-                Log.e(TAG, "Failed to lockFocus(). captureStillPicture instead and turn off mAutoFocus", e);
+                Log.e(TAG,
+                        "Failed to lockFocus(). captureStillPicture instead and turn off "
+                                + "mAutoFocus",
+                        e);
                 captureStillPicture();
                 mAutoFocus = false;
             }
@@ -460,12 +468,36 @@ private void prepareImageReader() {
         if (mImageReader != null) {
             mImageReader.close();
         }
-        Size largest = mPictureSizes.sizes(mAspectRatio).last();
-        mImageReader = ImageReader.newInstance(largest.getWidth(), largest.getHeight(),
+        final Size pictureSize;
+        SortedSet<Size> sizes = mPictureSizes.sizes(mAspectRatio);
+        if (sizes == null) { // Not supported
+            mAspectRatio = chooseAspectRatio();
+            if (mPictureSizes.sizes(mAspectRatio) == null) {
+                pictureSize = chooseOptimalSize();
+            } else {
+                // Largest picture size in this ratio
+                pictureSize = mPictureSizes.sizes(mAspectRatio).last();
+            }
+        } else {
+            pictureSize = sizes.last();
+        }
+
+        mImageReader = ImageReader.newInstance(pictureSize.getWidth(), pictureSize.getHeight(),
                 ImageFormat.JPEG, /* maxImages */ 2);
         mImageReader.setOnImageAvailableListener(mOnImageAvailableListener, null);
     }
 
+    private AspectRatio chooseAspectRatio() {
+        AspectRatio r = null;
+        for (AspectRatio ratio : mPreviewSizes.ratios()) {
+            r = ratio;
+            if (ratio.equals(Constants.DEFAULT_ASPECT_RATIO)) {
+                return ratio;
+            }
+        }
+        return r;
+    }
+
     /**
      * <p>Starts opening a camera device.</p>
      * <p>The result will be processed in {@link #mCameraDeviceCallback}.</p>
diff --git a/library/src/main/java/com/google/android/cameraview/CameraView.java b/library/src/main/java/com/google/android/cameraview/CameraView.java
index d3e31d2a..ed0fd666 100644
--- a/library/src/main/java/com/google/android/cameraview/CameraView.java
+++ b/library/src/main/java/com/google/android/cameraview/CameraView.java
@@ -357,7 +357,11 @@ public boolean getAdjustViewBounds() {
      *               {@link #FACING_FRONT}.
      */
     public void setFacing(@Facing int facing) {
-        mImpl.setFacing(facing);
+        try {
+            mImpl.setFacing(facing);
+        } catch (Exception e) {
+            mCallbacks.onCameraError(e);
+        }
     }
 
     /**
@@ -426,7 +430,11 @@ public boolean getAutoFocus() {
      * @param flash The desired flash mode.
      */
     public void setFlash(@Flash int flash) {
-        mImpl.setFlash(flash);
+        try {
+            mImpl.setFlash(flash);
+        } catch (Exception e) {
+            mCallbacks.onCameraError(e);
+        }
     }
 
     /**
@@ -505,7 +513,8 @@ protected void createWindowFrame() {
                         R.drawable.frame_face_mask);
                 int height = face.getHeight();
                 int width = face.getWidth();
-                canvas.drawText(title, centerX, centerY - (height / 2) - dpToPx(TITLE_MARGIN_BOTTOM), textPaint);
+                canvas.drawText(title, centerX,
+                        centerY - (height / 2) - dpToPx(TITLE_MARGIN_BOTTOM), textPaint);
                 canvas.drawBitmap(faceMask, centerX - (width / 2), centerY - (height / 2), paint);
                 canvas.drawBitmap(face, centerX - (width / 2), centerY - (height / 2), null);
                 break;
@@ -517,7 +526,8 @@ protected void createWindowFrame() {
                         R.drawable.frame_face_id_mask);
                 int height = face.getHeight();
                 int width = face.getWidth();
-                canvas.drawText(title, centerX, centerY - (height / 2) - dpToPx(TITLE_MARGIN_BOTTOM), textPaint);
+                canvas.drawText(title, centerX,
+                        centerY - (height / 2) - dpToPx(TITLE_MARGIN_BOTTOM), textPaint);
                 canvas.drawBitmap(faceMask, centerX - (width / 2), centerY - (height / 2), paint);
                 canvas.drawBitmap(face, centerX - (width / 2), centerY - (height / 2), null);
                 break;
@@ -533,7 +543,8 @@ protected void createWindowFrame() {
                 break;
             }
             case PASSPORT: {
-                Bitmap picture = BitmapFactory.decodeResource(getResources(), R.drawable.frame_passport);
+                Bitmap picture = BitmapFactory.decodeResource(getResources(),
+                        R.drawable.frame_passport);
                 drawRoundedRectBitmap(picture, centerX, centerY, canvas, radius, paint, textPaint);
                 break;
             }
@@ -549,7 +560,8 @@ private void drawRoundedRectBitmap(Bitmap picture, int centerX, int centerY, Can
             int radius, Paint paint, Paint textPaint) {
         int height = picture.getHeight();
         int width = picture.getWidth();
-        canvas.drawText(title, centerX, centerY - (height / 2) - dpToPx(TITLE_MARGIN_BOTTOM), textPaint);
+        canvas.drawText(title, centerX, centerY - (height / 2) - dpToPx(TITLE_MARGIN_BOTTOM),
+                textPaint);
         // draw masking
         canvas.drawPath(
                 roundedRect(centerX - (width / 2), centerY - (height / 2),