Apparatus, a method and a computer program for video coding and decoding

An apparatus configured to encode a bitstream, the apparatus comprising at least one processor and at least one memory, said at least one memory stored with code thereon, which when executed by said at least one processor, causes an apparatus to perform at least:

• providing, in a media presentation description, metadata for at least a first set of pictures of a first coded video representation and a second set of pictures of a second coded video representation;
• providing, in the media presentation description, one or more characteristics for decoding a sequence of non-overlapping consecutive segments or subsegments of at least the first coded video representation and the second coded video representation;
• providing, in the media presentation description, an indication that the first coded video representation includes skip-coded random access point pictures usable as a reference for prediction in decoding the second set of pictures of the second coded video representation;
• and
• encoding skip-coded intra random access point pictures in the first coded video representation and containing information to be used as reference pictures for prediction in decoding the second coded video presentation,
• wherein the second coded video representation differs from the first coded video representation in one or more of the following:
• chroma format, sample bit depth, color gamut, or spatial resolution.

Physical media storing instructions thereon for use by an apparatus to encode a bitstream, the instructions, when executed by a processor, causing the apparatus to perform at least:

• provide, in a media presentation description, metadata for at least a first set of pictures of a first coded video representation and a second set of pictures of a second coded video representation;
• provide, in the media presentation description, one or more characteristics for decoding a sequence of non-overlapping consecutive segments or subsegments of at least the first coded video representation and the second coded video representation;
• provide, in the media presentation description, an indication that the first coded video representation includes skip-coded random access point pictures usable as a reference for prediction in decoding the second set of pictures of the second coded video representation;
• and
• encode skip-coded intra random access point pictures in the first coded video representation and containing information to be used as reference pictures for prediction in decoding the second coded video presentation,
• wherein the second coded video representation differs from the first coded video representation in one or more of the following:
• chroma format, sample bit depth, color gamut, or spatial resolution.