Abstract: The embodiments relate to a method comprising receiving visual data from image capturing means, said visual data comprising a plurality of entities (510); processing the visual data to determine one or more grouping types for at least selected entities of said plurality of entities (520); storing said one or more grouping types as a metadata of a container file format, said one or more grouping types being associated with said selected entities (530); and including the metadata to a container file in association with said visual data (540).