Iris in / out
Watch as an animation →A circle narrows or opens to close or open a scene, giving a classic film or cartoon feel.
A comic ending, retro ads, emphasizing a particular subject.
Use xfade=transition=circleclose or circleopen. Frame the start frame in advance so the subject sits at the center where the circle closes.
Close a circular iris at the end of the first 4-second clip and open the next, with the subject centered in both: ffmpeg -i a.mp4 -i b.mp4 -filter_complex "xfade=transition=circleclose:duration=0.7:offset=3.3" -an out.mp4. Use circleopen for an opening iris instead, and compose the first shot so the subject sits in the middle.
Toni's Film Club — The Most Iconic Film Transition, Explained (Iris Shot)
Not verified