Inside Macintosh: QuickTime /

Chapter 2 - Movie Toolbox / Movie Toolbox Reference

Functions for Editing Movies / Editing Tracks

ScaleTrackSegment

The ScaleTrackSegment function changes the duration of a segment of a track. This may change the duration of the movie that contains the track. However, this function does not cause the Movie Toolbox to add data to or remove data from the movie.

pascal OSErr ScaleTrackSegment (Track theTrack, TimeValue in, 
                                 TimeValue oldDuration,
                                 TimeValue newDuration);

theTrack

Specifies the track for this operation. Your application obtains this track identifier from such Movie Toolbox functions as NewMovieTrack and GetMovieTrack (described on page 2-136 and page 2-188, respectively).

in

Specifies the start of the segment. The oldDuration parameter specifies the segment's duration. This time value must be expressed in the time scale of the movie that contains the track.

oldDuration

Specifies the duration of the segment. This time value must be expressed in the time scale of the movie that contains the track.

newDuration

Specifies the new duration of the segment. This time value must be expressed in the time scale of the movie that contains the track. The function alters the segment to accommodate the new duration.

ERROR CODES

invalidTrack	-2009	This track is corrupted or invalid
invalidDuration	-2014	This duration value is invalid
invalidTime	-2015	This time value is invalid

Memory Manager errors