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

Media Data Atom TypesTimecode MediaValue0x00200x0040MeaningCondenseExtendText sizeA 16-bit integer that specifies the point size of the time code text.ReservedA 16-bit integer that is reserved for use by Apple. Set this field to 0.Text colorA 48-bit RGB color value for the timecode text.Background colorA 48-bit RGB background color for the timecode text.Font nameA Pascal string specifying the name of the timecode text’s font.Timecode Sample DataA timecode media sample is recorded as a 32-bit integer, interpreted based on the value of the Counter flagin the timecode sample description.If the Counter flag is set to 1 in the timecode sample description, the sample data is an unsigned 32-bit integer.The timecode counter value is determined by dividing this unsigned 32-bit integer by the number of framesfield in the timecode sample description.If the Counter flag is set to 0 in the timecode sample description, the sample data format is a signed 32-bitinteger and is used to calculate a timecode record, defined as follows.HoursAn 8-bit unsigned integer that indicates the starting number of hours.NegativeA 1-bit value indicating the time’s sign. If bit is set to 1, the timecode record value is negative.MinutesA 7-bit integer that contains the starting number of minutes.SecondsAn 8-bit unsigned integer indicating the starting number of seconds.2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.192