Quicktime File Format (2012-08-14).pdf

Media Data Atom TypesMovie Mediatime line. If the time specified in the clip begin atom is greater than the duration of the embedded movie,then the embedded movie will not play at all.struct MovieMediaTimeRecord {wideTimeScaletime;scale;};kMovieMediaClipDurationA MovieMediaTimeRecord that indicates the duration of the embedded movie that should be used.The clip duration atom is applied by removing media from end of the embedded movie. If the clip durationatom is not present, then no media is removed from the end of the embedded movie. In situations wherethe sample contains both a clip duration and a clip begin atom, the clip begin is applied first. If the clipduration specifies a value that is larger than the duration of the embedded movie, no change is madeto the embedded movie.kMovieMediaEnableFrameSteppingA Boolean that indicates whether or not the embedded movie should be considered when performingstep operations, specifically using the interesting time calls with the nextTimeStep flag. If this atom isnot present or is set to false, the embedded movie is not included in step calculations. If the atom isset to true, it is included in step calculations.kMovieMediaBackgroundColorAn RGBColor that is used for filling the background when the movie is being instantiated or when itfails to instantiate.2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.313