The disclosed embodiments relate to a multimedia data encoding/decoding method and apparatus. In some aspects, a decoding method comprises receiving multimedia data which comprises a media area including a video data area and an audio data area, a media information area including a video track area and an audio track area respectively corresponding to the video data area and the audio data area respectively, and a menu description area including description data for displaying a menu that provides an interface between a user and media data in the media area. The media information area further comprises segment metadata for searching segments of the media data included in the media area. The segment metadata having information regarding one or more segment groups which the segments are classified into, and the media information area and the menu description area are incorporated into a single file.