To create a fast- or slow-motion effect, change clip speed. Changing clip speed changes the clip’s duration. Speeding up a clip removes frames, thus shortening the clip duration. In the same way, slowing down a clip repeats frames and thus adds to the length of a clip. For audio clips, a change in speed also changes pitch. The Time Stretch command includes an option to maintain the original pitch of an audio clip at any speed.
You can change a clip’s speed using the Expert view timeline only. Not the Quick view timeline.
When you change the speed of a clip containing interlaced fields, you may need to adjust how Premiere Elements processes the fields, especially when the speed drops below 100% of the original speed.
If you haven’t yet inserted the clip into the Expert view timeline, you can select it in the Project Assets panel instead.
You can change the speed and duration of multiple clips when you are in the Expert view.
To select non-consecutive clips, Shift-click each clip.
To select consecutive clips, click in the Project Assets panel and drag a marquee around the selected clips.
To select all the clips, press Ctrl-A.
Premiere Elements offers a guided edit for creating a slow or fast motion effect. Use this time remapping guided edit to add dramatic effects to your video. For more information see, Time remapping.
The duration of a video or audio clip is the length of time it plays from its first frame (In point) to its last frame (Out point). The initial duration of a clip is the same as it was when the clip was imported or captured. Most often, you change a clip’s duration by trimming frames from either end. But you can also trim the end of a clip by designating a specific duration.
Unlike video, still images are not limited to the length of the original clip. You can set their duration to any length.
When you increase the speed beyond a certain limit, the duration changes even if you have unlinked speed and duration.
Reversing a clip plays the clip backward, Out point to In point. You can also reverse the clip and change its speed. In the Expert view, you can reverse a clip using the Expert view timeline. In the Quick view, use the Time Remapping feature to reverse a clip.
To both reverse the clip and change its speed with one action, type a negative percentage for Speed, where –200 plays the clip in reverse at double its normal speed and –50 plays the clip in reverse at half its normal speed.