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

Media Data Atom TypesText MediaFramesAn 8-bit unsigned integer that specifies the starting number of frames. This field’s value cannot exceedthe value of the number of frames field in the timecode sample description.Text MediaText media is used to store text data in QuickTime movies. It has a media type of 'text'.Text Sample DescriptionThe text sample description contains information that defines how to interpret text media data. This sampledescription is based on the standard sample description header, as described in “Sample DescriptionAtoms” (page 99).The data format field in the sample description is always set to 'text'.The text media handler also adds some of its own fields to the sample description.2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.193