iMovie increasing duration of transition

IMovie won’t let you increase the duration of the transition because you have insufficient residual media in the video clips on each side of the transition for the increased transition to hook on to. Increase the residual media by trimming back the clips on each side of the transition as much as necessary to accommodate the increased duration of the transition.

— Rich

Well, yes. What you trim out will be invisible. But it will still exist under the surface as residual video that your transition can hook on to. We are talking about a few frames that shouldn’t be noticeable. Besides, what choice do you have? That’s the way transitions work.

— Rich

I'm happy to help.

By default iMovie creates enough residual video in a video clip to support a 2 second transition. If you need more than 2 seconds, with video clips one needs to trim back the clip to create some additional residual video for the longer transition to hook on to. I know. It sounds counter-intuitive to trim back to get more.

With photo clips, the opposite is true. When you need a longer duration transition between two photo clips you increase the duration of the photo by dragging out the edge to make it play longer. So, you drag out a photo, not trim it back.

-- Rich

Here’s the link.

Photo is blurry when imported to iMovie - Apple Community

— Rich

See my response to your blurry photo post.

-- Rich