public Bitmap GetSubsequentPosition(int framePosition)
{
IntPtr dib = Avi32.AVIStreamGetFrame(new IntPtr(getFrameObject), framePosition);
Avi32.BITMAPINFOHEADER bih = new Avi32.BITMAPINFOHEADER();
bih = (Avi32.BITMAPINFOHEADER)Marshal.PtrToStructure(dib, bih.GetType());
Bitmap bmp = new Bitmap(this.width, this.height, PixelFormat.Format24bppRgb);
BitmapData bmData = bmp.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
int srcStride = bmData.Stride;
int dstStride = bmData.Stride;
int dst = bmData.Scan0.ToInt32() + dstStride * (height - 1);
int src = dib.ToInt32() + Marshal.SizeOf(typeof(Avi32.BITMAPINFOHEADER));
for (int y = 0; y < height; y++)
{
Avi32.memcpy(dst, src, srcStride);
dst -= dstStride;
src += srcStride;
}
bmp.UnlockBits(bmData);
return bmp;
}