A timewarp is an effect in which the speed of the action taking place appears faster or slower than when it was originally recorded. A freeze-frame effect, in which a single frame is repeated, is another form of a timewarp. Timewarps can have a constant or variable speed. In some cases, such as when creating a fit to fill edit on the timeline, a timewarp is added automatically to a clip.
To access the Timewarp, use:
Timeline, then add Timeline FX from the Effects ribbon (see Adding Timeline FX).
Timeline, then use Batch FX (see Creating Batch FX).
Tools, then select from the menu (See Accessing Tools).
Batch, then select a node from the Node bin.
In Batch or Batch FX, the Timewarp node accepts front and matte clips, as well as forward and backward vectors.
Motion Vectors are 2D vectors that represent the displacement in normalized pixel units of a pixel in the current frame to the next frame (forward motion vector), or its displacement from the previous frame (backward motion vector). Motion Vectors can be rendered by a 3D application when dealing with synthetic images, or produced through image analysis when images come from live action footage.