FIELD: electrical communication equipment.
SUBSTANCE: invention relates to processing video data. Technical result is achieved by generating a file that comprises a track box that contains metadata for a track in the file, wherein: media data for the track comprises a sequence of samples, each of the samples being a video access unit of multi-layer video data; generation of the file comprises generating, in the file, a sub-sample information box that contains flags that specify a type of sub-sample information given in the sub-sample information box, based on that the flags have a particular specific value, a sub-sample corresponding to the sub-sample information box contains exactly one coded picture and zero or more non-Video Coding Layer (VCL) Network Abstraction Layer (NAL) units associated with the coded picture; and generating the sub-sample information box comprises, based on that the flags have said particular value, including, in the sub-sample information box, an additional value that indicates a layer identifier each sub-sample NAL unit of the sub-sample.
EFFECT: technical result is improved efficiency of processing video data.
36 cl, 12 dwg, 3 tbl
