Adobe Premiere Pro CC v.7.xx - Manual (Page 475)

Note:
Time-remapping distorts time for range of frames within clip.
It is best to apply time remapping controls to a clip in its own video track, or at least one not followed immediately by other clips. Slowing
any portion of a clip makes the duration of that clip longer. If a second clip immediately follows the lengthened clip in the video track, the
lengthened clip is automatically trimmed where the second clip begins. To recover the frames trimmed from the lengthened clip, click the Track
Select tool, Then Shift-drag the second clip toward the right to make room. All clips lying to the right move to the right. Click the Selection Tool,
then drag the right edge of the lengthened clip to the right, exposing its trimmed frames.
Vary change to clip speed
1. In a Timeline panel, click the Clip Effect menu and choose Time Remapping > Speed. (The Clip Effect menu appears next to the filename of
every clip in a video track. Zoom in, if necessary, to make enough room in the clip to display the menu.)
A horizontal rubber band that controls the speed of the clip appears across the center of the clip. The clip is shaded in contrasting colors
above and below the 100% speed demarcation. A white speed-control track appears in the upper portion of the clip, just below the clip title
bar.
Choosing Time Remapping > Speed from a video effect control
2. Ctrl-click (Windows) or Command-click (Mac OS) at least one point on the rubber band to set a keyframe. Speed keyframes appear near the
top of the clip, above the rubber band in the white speed-control track. Speed keyframes can be split in half, acting as two keyframes for
marking the beginning and end of a speed-change transition. Adjustment handles also appear on the rubber band, in the middle of the
speed-change transition.
Moving a speed keyframe up or down. Note its separable halves.
A. Speed keyframe B. Rubber band
3. Do one of the following:
Drag the rubber band on either side of the speed keyframe up or down to increase or decrease the playback speed of that portion.
(Optional) Press Shift while dragging to limit the speed change values to 5% increments.
Shift-drag the speed keyframe to the left or right to change the speed of the portion to the left of the speed keyframe.
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