Dissolve / Cross-fade
Watch as an animation →Two scenes overlap as they change, giving a sense of passing time, a flashback or a soft mood.
Time jumps such as cloudy to clear, the ending of an emotional ad.
If you put several scenes in one prompt, the model fills the gaps with dissolves on its own, so always make dissolves in the edit. Use xfade=transition=fade:duration=0.5:offset=… together with acrossfade.
Dissolves inside one AI generation come out as random melting, so generate each scene separately, then join two 4-second clips with a 0.8-second cross-fade for picture and sound: ffmpeg -i a.mp4 -i b.mp4 -filter_complex "[0:v][1:v]xfade=transition=fade:duration=0.8:offset=3.2[v];[0:a][1:a]acrossfade=d=0.8[a]" -map "[v]" -map "[a]" out.mp4