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Does a transition make my video shorter?
No. The video keeps its length: the transition happens around each join instead of overlapping the two clips.
Add Transitions to a Video
Turn hard cuts into smooth ones: a crossfade blends one shot into the next, a fade through black dips the picture and sound out and back in. The video stays on your device.
How to Add Transitions to a Video
- Open your video in the video editor. Cut out the parts you don't want, or add more clips with Merge: every cut and every join between clips gets a transition.
- In the Transitions tool on the left, press Crossfade or Fade through black. None keeps hard cuts.
- Set how long it takes with Length, from 0.2 to 2 seconds.
- To choose another transition at one join, open More options and change it there; the others keep Same as all.
- Press Save MP4 at the top right.
Questions
What happens to the sound?
With a fade through black, the sound fades out and back in with the picture. With a crossfade, the sound joins as it does at any cut, without a click.
How does the crossfade work?
Around the join, each clip is blended with a still picture of the other: first the clip that ends with the first frame of the next one, then the next clip with the last frame of the one before. On a short length it looks like a soft dissolve.
Why is my transition shorter than I set?
A transition can't be longer than the clips on either side of the join, so next to a very short clip it is shortened.