Methods, devices, and computer program for improving encapsulation of encoded volumetric data sub-bitstreams in a single entity

A method of processing a media file encapsulating a visual volumetric data bitstream, in a processing device, the visual volumetric data bitstream comprising a plurality of encoded sub-bitstreams corresponding to a plurality of components of visual volumetric data of the visual volumetric data bitstream, the method comprising:

• obtaining, from the media file,
• (i) a single entity comprising the plurality of encoded sub-bitstreams,
• (ii) at least two decoder configuration data structures and
• (iii) an indication for indicating whether at least one of the decoder configuration data structures is associated with an encoded sub-bitstream comprised in the single entity based on association information;
• and
• associating decoder configuration data to each sub-bitstream of the plurality based on the obtained at least two decoder configuration data structures and the indication.