Method, device, and computer program for improving random access in point cloud data bit-stream

A method of parsing a media file comprising encapsulated point cloud data or volumetric data, the media file comprising a track and metadata, the track describing a sequence of samples, each sample comprising at least one frame, the sequence of samples comprising at least one sync sample and a plurality of non-sync samples, at least one non-sync sample of the plurality of non-sync samples comprising a parameter set, the method comprising:

• identifying a non-sync sample of the plurality of non-sync samples;
• obtaining, from the metadata, an indication describing whether the identified non-sync sample requires, to be decoded, a parameter set from another non-sync sample of the plurality of non-sync samples;
• and
• decoding the identified non-sync sample as a function of the obtained indication.

A method of encapsulating point cloud data or volumetric data into an ISOBMFF-based media file, the point cloud data or volumetric data being organized in frames, the method comprising:

• generating a track describing a sequence of samples, each sample comprising at least one frame, the sequence of samples comprising at least one sync sample followed by a plurality of non-sync samples, at least one of the non-sync samples comprising a parameter set;
• generating metadata describing the parameter set of the at least one non-sync sample, the generated metadata being associated with the at least one sync sample;
• and,
• encapsulating the track and the metadata in the media file.