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Time-stretching a layer to and from specific times
When you time-stretch a layer, the audio file or the original frames in the footage (and all keyframes that belong to the layer) are redistributed along the new duration. Use this command only when you want the layer and all layer keyframes to change to the new duration.
Time-stretching a layer redistributes keyframes along the new duration.
If you time-stretch a layer so that the resulting frame rate is significantly different from the original speed, the quality of motion within the layer may suffer. Turn on frame blending to improve slow-motion or fast-motion effects. (See Enhancing time-altered motion by blending frames.)
To time-stretch a layer from a specific time:
- In the Timeline or Composition window, select the layer.
- Choose Layer > Time Stretch.
- Type a new duration for the layer, or type a Stretch Factor.
- Click one of the Hold In Place options to specify the point in time from which the layer will be time-stretched, and then click OK:
- Layer In-point holds the layer's current starting time, and time-stretches the layer by moving the Out point.
- Current Frame holds the layer at the position of the current-time indicator (also the frame displayed in the Composition window), and time-stretches the layer by moving the In and Out points.
- Layer Out-point holds the layer's current ending time and time-stretches the layer by moving the In point.
To time-stretch a layer to a specific time:
- In the Timeline window, move the current-time indicator to the frame where you want the layer to begin or end.
- Display the In and Out columns in the Timeline window by choosing Columns > In and Columns > Out from the Timeline window menu.
- Do one of the following:
- To stretch the In point to the current time, press Ctrl (Windows) or Command (Mac OS) as you click the In time for the layer in the In column.
- To stretch the Out point to the current time, press Ctrl (Windows) or Command (Mac OS) as you click the Out time for the layer in the Out column.