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QuickTime File Format : ウィキペディア英語版
QuickTime File Format

QuickTime File Format (QTFF) is a computer file format used natively by the QuickTime framework.〔(【引用サイトリンク】title=QuickTime File Format Specification: Introduction to QuickTime File Format Specification )〕〔(【引用サイトリンク】title=QuickTime - AfterDawn.com glossary )〕〔(【引用サイトリンク】title=QuickTime container )
== Design ==
The format specifies a multimedia container file that contains one or more tracks, each of which stores a particular type of data: audio, video, or text (e.g. for subtitles). Each track either contains a digitally-encoded media stream (using a specific format) or a data reference to the media stream located in another file. Tracks are maintained in a hierarchical data structure consisting of objects called atoms. An atom can be a parent to other atoms or it can contain media or edit data, but it cannot do both.〔(【引用サイトリンク】title=QuickTime File Format Specification: Movie Atoms )
The ability to contain abstract data references for the media data, and the separation of the media data from the media offsets and the track edit lists means that QuickTime is particularly suited for editing, as it is capable of importing and editing in place (without data copying). Other later-developed media container formats such as Microsoft's Advanced Systems Format or the Matroska and Ogg containers lack this abstraction, and require all media data to be rewritten after editing.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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