QuickTime Video, MPEG-4 Advanced Video Coding
Typically a final state format for enduser delivery sometimes a middle-state format, e.g., the source when producing lower-resolution streaming versions.
QUICKTIME 10 1 PARA MAC SOFTWARE
Various sources, including the Wikipedia QuickTime article (consulted February 2, 2012), name a number of versions of QuickTime, from 1991 to the present, but these seem to be references to the QuickTime production or playback software rather than the file wrapper per se.
An atom consists of a size, a type, and a data payload."Īs of February 2012, two versions of the file format specification were offered by Apple: the "classic" from 2001 and a newer version, as updated in 2012. Sometimes they contain data and sometimes they contain other atoms. The MultimediaWiki reports, "Atoms are chunks of data in that comprise a QuickTime file. Specialists describe QuickTime atoms as the format's fundamental building blocks. QuickTime also wraps still images (QuickTime Image Files), animations not recorded as video, virtual reality, etc., and these are not discussed at this site, with the exception of SWF_7 and SWF_8, the Flash SWF File Format (versions 7 and 8). This description is concerned with QuickTime as a video wrapper (generally with a synchronized audio stream), called "movie" files by Apple, and as a sound wrapper, especially as used by Apple's iTunes music service. File format that wraps video, audio, and other bitstreams.
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