The invention concerns a method for storing data in a multimedia file, the multimedia file containing an absolute time base indicator and at least a track wherein the data are stored. Said data comprise time values. The method is characterised in that it consists in associating with each track; at least a relative time base indicator which is a function of said absolute time base, and in determining some or all the time values contained in a track, with respect to a relative time base indicator associated with said track.