How to force UIImagePickerController to record video in landscape mode

I my application is running potrate mode but I want to record video in landscape mode.

    self.imgPicker = [[UIImagePickerController alloc] init];
         self.imgPicker.editing=FALSE;
         //self.imgPicker.allowsImageEditing = YES;
         self.imgPicker.delegate = (id)self;
 
         [self.imgPicker shouldAutorotateToInterfaceOrientation: UIInterfaceOrientationLandscapeRight];
         //self.imgPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
     #if !(TARGET_IPHONE_SIMULATOR)    
         self.imgPicker.sourceType = UIImagePickerControllerSourceTypeCamera;