Method, device, and computer program for encapsulating media data into a media file

A device for generating a media file from a timed sequence of media data comprising samples, the device comprising:

• a memory device that stores a set of instructions;
• and
• at least one processor that executes the set of instructions to perform the following steps:
• generating a track comprising at least one of the samples;
• generating a first data structure comprising data for describing each of one or more groups of samples in the track, the first data structure comprising a first grouping type, wherein the first data structure comprises data for indicating whether another first data structure with same first grouping type is present in a subsequent fragment of the track;
• and
• generating a media file including the track and the first data structure, for streaming via a communication network, or for storage on a computing device.

A device for generating a media file from a timed sequence of media data comprising samples, the device comprising:

• a memory device that stores a set of instructions;
• and
• at least one processor that executes the set of instructions to perform the following steps:
• generating a track comprising at least one of the samples;
• generating a first data structure assigning a subset of samples or subsamples of the track to one or more groups of samples;
• and
• generating a media file including the track, the samples, and the first data structure;
• wherein:
• the first data structure comprises data indicating, when set to a first value, that a group description index value associated with each group of samples in the first data structure is an index of a set of one or more property values in a second data structure, and when set to a second value, that the group description index value associated with each group of samples in the first data structure contains one or more property values.

A method of parsing a media file encapsulating a timed sequence of media data comprising samples, the method comprising:

• obtaining a track comprising at least one of the samples on a computing device;
• parsing a first data structure comprising data for describing each of one or more groups of samples in the track, the first data structure comprising a first grouping type, wherein the first data structure comprises data for indicating whether another first data structure with same first grouping type is present in a subsequent fragment of the track;
• and
• retrieving the media data based on the data for indicating whether another first data structure with same first grouping type is present in a subsequent fragment of the track.

A method of generating a media file from timed sequence of media data comprising samples, the method comprising:

• generating a track comprising at least one of the samples;
• generating a first data structure assigning a subset of samples or subsamples of the track to one or more groups of samples;
• and
• generating a media file including the track, the samples, and the first data structure, for streaming via a communication network, or for storage on a computing device;
• wherein:
• the first data structure comprises data indicating, when set to a first value, that a group description index value associated with each group of samples in the first data structure is an index of a set of one or more property values in a second data structure, and when set to a second value, that the group description index value associated with each group of samples in the first data structure contains one or more property values.

A device for parsing a media file encapsulating a timed sequence of media data comprising samples, the device comprising:

• a memory device that stores a set of instructions;
• and
• at least one processor that executes the set of instructions to perform the following steps:
• obtaining a track comprising at least one of the samples;
• parsing a first data structure comprising data for describing each of one or more groups of samples in the track, the first data structure comprising a first grouping type, wherein the first data structure comprises data for indicating whether another first data structure with same first grouping type is present in a subsequent fragment of the track;
• and
• retrieving the media data based on the data for indicating whether another first data structure with same first grouping type is present in a subsequent fragment of the track.