About Keyframes

In Shotcut, as well as in video compositing software, a keyframe is a frame used to indicate the beginning or end of a change made to a parameter. For example, a keyframe could be set to indicate the point at which audio will have faded up or down to a certain level.
Capture d’écran 2019-05-18 à 13.25.59

Or, Keyframing is the simplest form of animating a change to a parameter.

Keyframing in a compositing software:-

Example of Result of keyframing in shotcut:-
Image source from Zoom Image and then Pan - #2 by samth

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