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Hi, I want to create a video using a sequence as images, I have greayscale images with resolution 640x480,I tried to make this simple application fallowing the next steps: 1) I read each images with imread 2) I used VideoWriter for writing video, but my video after saving is the 0 second saved :(

This is my code:

#include "opencv2/opencv.hpp"
#include <iostream>

using namespace std;
using namespace cv;

int main(int argc, char* argv[])
{
    for(int i = 0; i < 30; i++)
    {
        char left[1024] = "";
        sprintf(left, "left640x480_%d.bmp", i);

        Mat image(640, 480, CV_8UC1);
        image = imread(left, 0);

        VideoWriter video("out.avi", CV_FOURCC('M','J','P','G'), 30, Size(640, 480), false);

        Mat frame;
        image.copyTo(frame);
        video.write(frame);
        imshow( "Frame", frame );
        char c = (char)waitKey(33);
        if( c == 27 )
            break;
    }

  return 0;
}

I use OpenCV 3.1 in C++. Thank you for your help!