Strange greyscale captured image using DC10 / Zoran - Help needed

[Marcio Calixto Cabral <mcabral@xxxxxxxxxx>]

 Hi there,

 I am writing a small program to test capture abilities of my frame
grabber. The problem is that I don't know what is going on with the image
captured. Is it possible that I am not capturing using the right
parameters such as palette and norm and that could be causing the
problem? How do I know what palettes are supported by my framegrabber?
Does it have to be in accord with the frame buffer depth? Here is a small
part of the program. If anybody out there could have a look and maybe
point me out some more detailed documentation to read or even correct my
program, I'd appreciated a lot.


  if (ioctl (fdVideoDev, VIDIOCGMBUF, &vd.CapturedFrameBuffer) == -1) {
    map = (char*) malloc (vd.Window.width * vd.Window.height * 3);
    len = read (fdVideoDev, map, vd.Window.width * vd.Window.height * 3);
    if (len <= 0) {
      free (map);
      return (NULL);
    }
    //*size = 0;
    return (map);
  }

  //CapturedFrameBuffer is struct video_mbuf
  vd.buf_v4l = (struct video_mmap*)malloc(vd.CapturedFrameBuffer.frames *
sizeof(struct video_mmap));

  //buf_v4l is struct video_mmap
  vd.buf_v4l[0].format = vd.Picture.palette;
  vd.buf_v4l[0].frame = 0;
  vd.buf_v4l[0].width = vd.Window.width;
  vd.buf_v4l[0].height = vd.Window.height;

  if (ioctl (fdVideoDev, VIDIOCMCAPTURE, &(vd.buf_v4l[0])) == -1) {
    perror ("VIDIOCMCAPTURE");
    munmap (map, vd.CapturedFrameBuffer.size);
    return (NULL);
  }

  FILE *out;
  out = fopen("pic","w");

  fprintf(out,"P5\n%d
%d\n255\n",vd.buf_v4l[0].width,vd.buf_v4l[0].height);
  fwrite(frame,vd.buf_v4l[0].width,vd.buf_v4l[0].height,out);

  Thank's in advance,
  Marcio Cabral