两个结构体: typedef struct { char fccType[4] ; // offset 0x00: 'iavs' char fccHandler[4] ; // offset 0x04: 'dvsd' or 'DIVX' unsigned long dwFlags ; // offset 0x08: 0x0 unsigned short wPriority ; // offset 0x0c: 0 unsigned short wLanguage ; // offset 0x0e: 0x0 undefined unsigned long dwInitialFrames ; // offset 0x10: 0 unsigned long dwScale ; // offset 0x14: 100 (29.970 Frames/Sec) unsigned long dwRate ; // offset 0x18: 2997 unsigned long dwStart ; // offset 0x1c: 0 unsigned long dwLength ; // offset 0x20: 2192 unsigned long dwSuggestedBufferSize ; // offset 0x24: 120000 unsigned long dwQuality ; // offset 0x28: 0 unsigned long dwSampleSize ; // offset 0x2c: 0 unsigned short frameTop ; // offset 0x30: 0 unsig