                                 entry_size[15] = 949
                                    entry_size[16] = 962
                                    entry_size[17] = 848
                                [stco: Chunk Offset Box]
                                    position = 670
                                    size = 24
                                    version = 0
                                    flags = 0x000000
                                    entry_count = 2
                                    c