code: def __update_offsets(self, fileobj, atoms, delta, offset):
          
          if delta == 0:
              return
          moov = atoms[b"moov"]
          for atom in moov.findall(b'stco', True):
              self.__update_offset_table(fileobj, ">%dI", atom, delta, offset)
          for atom in moov.findall(b'co64', True):
              self.__update_offset_table(fileobj, ">%dQ", atom, delta, offset)
          try:
              for atom in atoms[b"moof"].findall(b'tfhd', True):
                  self.__update_tfhd(fileobj, atom, delta, offset)
          except KeyError:
              pass
docs: Update offset tables in all 'stco' and 'co64' atoms.