In Blackbird, you can create clip motion effects such as slow down or speed up motion using the "fit to fill" method. This method involves editing a clip from the source viewer to the edit window and specifying a duration range to fill. Here's how to do it:

  1. Start by ensuring you have a clip in the timeline to which you want to apply the duration range. For this example, let's say you want the final clip length to be 8 seconds. On the edit side of the timeline, mark an in point and set a duration range of 8 seconds.

  2. Next, go to the source viewer and set a mark in and mark out duration of 4 seconds. Both the source and edit sides should have in and out marks.

  3. Now, drag and drop the clip from the source viewer to the edit window. This action will prompt you to make a choice of an insert or overwrite type of edit. If you have mapped a keyboard shortcut to perform either edit type, it will save you time and avoid having to select an edit type.

  4. The result of this example will create a clip with a slow motion effect of 50 percent or half speed on the timeline. The motion-timed affected clip will have two lines: the top line represents the full duration of the edit side of the clip, and the bottom line represents the source frames used to make up the time-affected clip.

  5. Keep in mind that since the audio tracks were enabled during the edit, the sound was also slowed down by 50 percent. If this is undesirable, make sure to disable the audio tracks when editing or delete them after the edit is made.

In the next tutorial, you will learn about creating the motion effect directly on the timeline.