Method getCurrentFrameNumber

SIBR_viewers/src/core/video/Video.cpp:45–48

	}

	int Video::getCurrentFrameNumber() { 
		checkLoad();  
		return (int)cap.get(cv::VideoCaptureProperties::CAP_PROP_POS_FRAMES); 
	}
	
	void Video::setCurrentFrame(int i){ 
		checkLoad();