*I try to open an AVI file. The return of the open method is false, although the file exists.Here below the snippet code. Any idea, suggestion is welcome.

include "opencv2/opencv.hpp"

using namespace cv; using namespace std; int main(int argc , char* argv []) { VideoCapture cap(0); bool ok = cap.open (argv [1]); if (ok == false) { cout << "Problem when opening file." << endl; return -1; } return(0); }

*I I try to open an AVI file. The return of the open method is false, although the file exists.Here exists.
Here below the snippet code. Any idea, suggestion is welcome.

#include "opencv2/opencv.hpp"
  
using namespace cv;
using namespace std;
int main(int argc , char* argv []) {
     VideoCapture cap(0); 
     bool ok = cap.open (argv [1]);
     if (ok == false) {
         cout << "Problem when opening file." << endl;
         return -1;
     } 
     return(0);
 }}