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Measuring video time

In the natural world, we experience time as a continuous flow of events. However, working with video requires precise synchronization, so it's necessary to measure time using numbers. Familiar time divisions—hours, minutes, and seconds—are not precise enough for video editing, because a single second might contain several events. This section describes how Premiere and video professionals measure time, using standard methods which count fractions of a second in frames.

How the timebase and frame rates affect each other

You determine how time is divided in your project by specifying the project timebase. For example, a timebase of 30 means that each second is divided into 30 units. The exact time at which an edit occurs depends on the timebase you specify, because an edit can only occur at a time division, and using a different timebase causes the time divisions to fall in different places.


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