write AVI file from raw image - c++

Question

I am reading a raw file which is having only 1's and 0's which i have saved from SurfaceFlinger into a character buffer and write to IplImage. Then I am trying to write it to a video file but cvWriteFrame() is returning 0.Can any one help where I am going wrong.
Below is my code.
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>
#include <stdio.h>
#include <cstring>
using namespace cv;
using namespace std;
int main(int argc, char** argv) {
FILE * pFile;
long lSize;
char * buffer;
size_t result;
pFile = fopen(argv[1], "rb");
if (pFile == NULL) {
fputs("File error", stderr);
exit(1);
}
// obtain file size:
fseek(pFile, 0, SEEK_END);
lSize = ftell(pFile)
rewind(pFile);
// allocate memory to contain the whole file:
buffer = (char*) malloc(sizeof(char) * lSize);
if (buffer == NULL) {
fputs("Memory error", stderr);
exit(2);
}
// copy the file into the buffer:
result = fread(buffer, 1, lSize, pFile);
if (result != lSize) {
fputs("Reading error", stderr);
exit(3);
}
// clean up
fclose(pFile);
IplImage *img;
img = cvCreateImage(cvSize(768, 1280), IPL_DEPTH_8U, 4);
memcpy(img->imageData, buffer, lSize);
cvSaveImage("Displaywindow.png", img);
int width = img->width;
int height = img->height;
CvVideoWriter *writer = cvCreateVideoWriter("out.avi",
CV_FOURCC_DEFAULT,
30,
cvSize(height, width), 1);
if(writer == NULL)
{
printf("error\n");
exit(0);
}
for(int counter=0;counter < 3000;counter++)
{
if(cvWriteFrame(writer,img) == 0)
{
printf("con't write\n");
exit(0);
}
}
waitKey(0);
return 0;
}
I am passing my raw file as argument.