Open the Clip Speed/Duration window in Premiere Pro by right-clicking on a clip in the timeline or by going to Clip > Speed/Duration in the main menu bar. It’s common in video editing to choose the in-and-out points of clips based on the story you want to show your viewers, so best practices recommend leaving the speed and duration functions linked. In this way, you won’t add unnecessary footage or remove essential footage from a project.
Reverse Speed — lets you present your clip backward so that the in and out points are flipped.Maintain Audio Pitch — keeps the audio track the same even if you change the speed or duration of the video. Checking this box is a good way to prevent ambient tones from increasing or decreasing in pitch.Ripple Edit, Shifting Trailing Clips — allows you to change the duration of a clip and adjust the following clips in the sequence to compensate for this change. If you don’t select this option, a clip with increased duration cuts off the head of the subsequent clip, and a clip with decreased duration is followed by black frames where the tail of the clip used to be.
