Friday, 13 March 2009

Avid - changing the speed of video

Most of the speed effects found in Avid are variable speed effects, i.e. speed bumps, fast to slow or slow to fast. The most commonly asked for speed effect is a constant speed change. To create this effect you should use the Trim To Fill option found in the Timewarp effect. Although very simple, using this effect is not immediately straight forward and so here is an explanation on how to use it.

How to make a clip faster of slower
  1. Open your sequence.
  2. Open the Effect Palette and select Timewarp from the list on the left hand side.
  3. Click and drag the Trim To Fill effect onto the clip you want to make faster or slower in the sequence.
  4. By default the speed of the effect is always 100%. Unlike other effects where you adjust the options in the effect Editor, with the Trim To Fill effect you make the clip faster or slower on the timeline with the Trim Tool.
  5. Click the Trim Tool to go into trimming mode.
  6. Dragging the trim handles to make the clip longer will slow the speed of the clip. If you have Clip Names displayed you will notice the percentage of the speed change as the clip length changes.
  7. Conversely, dragging the trim handles to make the clip shorter will make the clip faster.
  8. Moving the trim handles does not edit the clip, only the effect is adjusted.