The invention relates according to one of its embodiments to a method for encapsulating a video bitstream organized into slice segments, the slice segments comprising a plurality of coding units, the method comprising: obtaining a region of interest comprising one or more tiles, each tile comprising a set of one or more coding units; determining whether the region of interest forms part of a slice segment; if it is determined that the region of interest forms part of a slice segment, defining a new slice segment comprising the coding units of only the region of interest; and encapsulating the bitstream comprising the coding units of the region of interest using the new slice segment if it is determined that the region of interest forms part of a slice segment, and using the slice segment otherwise.