Speed
Like all other retiming operations, the Speed Multiplier acts on the entire layer – its parameters, keyframes, Generators, and Modifiers. By modifying this value, a time stretch that uses the original speed as a reference will be applied to the layer.
- A value of 0.5 will multiply the duration of the layer by 2, slowing down any animation
- A value of 2.0 will divide the duration of the layer by 2, speeding up layer animation
The only parameter that can be excluded from this time stretch is layer visibility, through the Retime visibility switch.
As with Time offset, it is possible to connect, share, and control this parameter using a Generator, but with the limitations mentioned in the "Connection to other parameters" section.
Time stretching and temporal reference point
When changing the Speed Multiplier value, the layer will shrink or expand based on a reference point that will remain unchanged. This point is the first frame of a layer's initial range:
- The first frame of a movie or image sequence, regardless of the first visibility key
- The first frame of a procedurally-generated layer, such as a Circle or Polygon.
This value cannot be negative and is not made to reverse footage. To temporally reverse a layer, use Reverse Sequence instead.
To control this time stretch using the notion of duration rather than speed, please refer to the Time Remapping features, which will also allow you to define a non-linear temporal interpolation.