Read Camera Write Video

	// ReadCameraWriteVideo.cpp : Defines the entry point for the console application.
	//
	#include "stdafx.h"
	#include <iostream>
	// Include standard OpenCV headers
	#include "cv.h"
	#include "highgui.h"
	using namespace std;
	// All the new API is put into "cv" namespace
	using namespace cv;
	int main (int argc, char *argv[])
	{
	// Open the default camera
	VideoCapture capture(0);
	// Check if the camera was opened
	if(!capture.isOpened())
	{
	cerr << "Could not create capture";
	return -1;
	}
	// Get the properties from the camera
	double width = capture.get(CV_CAP_PROP_FRAME_WIDTH);
	double height = capture.get(CV_CAP_PROP_FRAME_HEIGHT);
	cout << "Camera properties\n";
	cout << "width = " << width << endl <<"height = "<< height << endl;
	// Create a matrix to keep the retrieved frame
	Mat frame;
	// Create a window to show the image
	namedWindow ("Capture", CV_WINDOW_AUTOSIZE);
	// Create the video writer
	VideoWriter video("capture.avi",-1, 30, cvSize((int)width,(int)height) );
	// Check if the video was opened
	if(!video.isOpened())
	{
	cerr << "Could not create video.";
	return -1;
	}
	cout << "Press Esc to stop recording." << endl;
	// Get the next frame until the user presses the escape key
	while(true)
	{
	// Get frame from capture
	capture >> frame;
	// Check if the frame was retrieved
	if(!frame.data)
	{
	cerr << "Could not retrieve frame.";
	return -1;
	}
	// Save frame to video
	video << frame;
	// Show image
	imshow("Capture", frame);
	// Exit with escape key
	if(waitKey(1) == 27)
	break;
	}
	// Exit
	return 0;
	}

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