I've just written a first program for videocaptur and videowriter. I copied the source from the wiki and changed the only video file name, but it made error.
Here is the source from the wiki.
The opencv is 2.1 and the compiler is visual c++ 2008 express.
#include "cv.h"
#include "highgui.h"
using namespace cv;
int main(int, char**)
{
VideoCapture capture(1); // open the default camera
if( !capture.isOpened() ) {
printf("Camera failed to open!\n");
return -1;
}
Mat frame;
capture >> frame; // get first frame for size
// record video
VideoWriter record("RobotVideo.avi", CV_FOURCC('D','I','V','X'), 30, frame.size(), true);
if( !record.isOpened() ) {
printf("VideoWriter failed to open!\n");
return -1;
}
namedWindow("video",1);
for(;;)
{
// get a new frame from camera
capture >> frame;
// show frame on screen
imshow("video", frame);
// add frame to recorded video
record << frame;
if(waitKey(30) >= 0) break;
}
// the camera will be deinitialized automatically in VideoCapture destructor
// the recorded video will be closed automatically in the VideoWriter destructor
return 0;
}
With the source, I changed 2 parts. One is for VideoCapture. (I don't have tunercard or camera.) The source is
VideoCapture capture(1); // open the default camera
and changed to
VideoCapture capture("C:/Users/Public/Videos/Sample Videos/WildlifeTest.wmv");
And the other is for VideoWriter:
// record video
VideoWriter record("RobotVideo.avi", CV_FOURCC('D','I','V','X'), 30, frame.size(), true);
and changed to
VideoWriter record("C:/Users/Public/Videos/Sample Videos/WildlifeRec.wmv",
CV_FOURCC('W','M','V','1'), 30,frame.size(), true);
and the part of error is:
// add frame to recorded video
record << frame;
Please show me what is my mistake!
P.S.
when I delete the line record << frame;, it works well. I think the error caused at the line.
And I found that even if without change, the wiki source program make same error.
