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A representation of a time value in seconds. This is similar to After Effect’s TDB, or QuickTime’s representation of time. They each have a value, and the scale of the value. For example, if the scale is the rational 1/25 (PAL 25fps), and the value is 50, the time is 2 seconds.

xmpDM:scaleThe scale for the time value. For NTSC, use 1001/30000, or the less accurate 100/2997. For PAL, use 1/25.Rational
xmpDM:valueThe time value in the specified scaleInteger
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