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Monday, June 17, 2024

Progress on Event Messages in the ISO Base Media File Format

At the recent 133rd MPEG meeting, MPEG Systems has reached the first milestone of the development of a standard to carry event messages in tracks of the ISO Base Media File Format by promoting ISO/IEC 23001-18 to Committee Draft (CD) stage.

This specification provides a method for the carriage of event messages in tracks of the ISO Base Media File Format (ISOBMFF, ISO/IEC 14496-12). This event message track format associates the timeline of the DashEventMessageBox messages to the track timeline. The specified track format enables all common ISOBMFF processing such as multiplexing and de-fragmentation. In addition, multiplexing and de-multiplexing operations using top-level DashEventMessageBox based on this event message track format are defined. The carriage in the event message track format will also make this information more easily accessible to devices that can seek through ISOBMFF formatted media files. This standard is expected to reach its final milestone (i.e., Final Draft International Standard (FDIS)) in early 2022.


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