from GUI_AVI.h:125
typedef struct
{
U32 BlockID;
U32 BlockSize;
U32 SecPerFrame;
U32 MaxByteSec;
U32 PaddingGranularity;
U32 Flags;
U32 TotalFrame;
U32 InitFrames;
U32 Streams;
U32 RefBufSize;
U32 Width;
U32 Height;
U32 Reserved[4];
}AVIH_HEADER;