19. The computer program product of claim 17 , wherein the file is in accordance with International Organization for Standardization (ISO) base media file format.
19. The computer program product of claim 17 , wherein the file is in accordance with International Organization for Standardization (ISO) base media file format. 20. The computer program product of claim 19 , wherein the metadata type is indicated by a grouping type and grouping instance data, the grouping type specifying semantics of the grouping instance data and the metadata content.