The invention concerns a method for synchronizing data in a multimedia document (50), said document comprising at least two separate computer files (track1, track2) called the first file, the second file, etc., in which method: there is stored in the first file, in the second file, etc., respectively data of a first type, of a second type, etc., said data being grouped in the form of at least one event-related command characterizing an event, said event being either important or unimportant,--at least one synchronization command is inserted in each file, characterized in that said synchronization command is inserted before each event-related command characterizing an important event.