Methods and apparatuses for dynamic adaptive streaming over http

An apparatus for receiving media data, the apparatus comprising:

• processing circuitry configured to
• receive a timed metadata track of a plurality of segments including a plurality of metadata samples, a duration of each of the plurality of segments being equal to a duration of a metadata sample included in the respective segment;
• determine a presentation time of one of the plurality of metadata samples;
• and
• process event information included in one or more event message boxes included in the one of the plurality of metadata samples based on the presentation time of the one of the plurality of metadata samples, wherein
• a correct timing of each of the plurality of metadata samples is maintained during fragmentation and defragmentation processes that are performed on the timed metadata track.

A non-transitory computer-readable storage medium storing instructions which when executed by a computer for receiving media data cause the computer to perform:

• receiving a timed metadata track of a plurality of segments including a plurality of metadata samples, a duration of each of the plurality of segments being equal to a duration of a metadata sample included in the respective segment;
• determining a presentation time of one of the plurality of metadata samples;
• and
• processing event information included in one or more event message boxes included in the one of the plurality of metadata samples based on the presentation time of the one of the plurality of metadata samples, wherein
• a correct timing of each of the plurality of metadata samples is maintained during fragmentation and defragmentation processes that are performed on the timed metadata track.