Writing AVI files in OpenCV

Question

There example on the net and code given in Learn OpenCv,Orielly.

After many attempts the out.avi file is written with 0 bytes. I wonder where i went wrong.

T

Answer 1

This code worked fine:

 cv.h 
 highgui.h 
 cvaux.h 
 cvcam.h 
 cxcore.h 

int main(){

    CvVideoWriter *writer = 0;
    int isColor = 1;
    int fps     = 5;  // or 30
    IplImage* img = 0; 
    img=cvLoadImage("animTest_1.bmp");
    int frameW  = img->width; //640; // 744 for firewire cameras
    int frameH  = img->height; //480; // 480 for firewire cameras

    writer=cvCreateVideoWriter("out.avi",-1,
        fps,cvSize(frameW,frameH),1);

    cvWriteFrame(writer, img);      // add the frame to the file

    char *FirstFile,fF[20]="",*fileNoStr,fns[4]="";
    fileNoStr=fns;
    for(int fileNo;fileNo<100;fileNo++){
        FirstFile=fF;   
        itoa(fileNo,fileNoStr,10);
        FirstFile=strcat ( FirstFile,"animTest_");
        FirstFile=strcat ( FirstFile,fileNoStr);
        FirstFile=strcat ( FirstFile,".bmp");

        printf(" \n%s .",FirstFile);
        img=cvLoadImage(FirstFile);

        cvWriteFrame(writer, img);

    }
    cvReleaseVideoWriter(&writer);

    return 0;
}