How to fade in and fade out a movie in PowerPoint?

  1. Insert some audio to your slide.
  2. Go to the Ribbon. Choose Audio Tools menu and click Playback tab.
  3. Find Fade Duration section.
  4. Set Fade In and Fade Out as you like.
  5. Click Play button to check if it’s working as you need.

Note: It’s working the same for Audio.