crossdissolve

A cross-dissolve is a film and video editing transition in which one shot gradually fades out while the next fades in, so the two shots briefly overlap in time. The result is a smooth blend of images rather than an abrupt cut.

In practice, editors apply a cross-dissolve by overlapping the two clips on the timeline and adjusting the outgoing shot's opacity from 100% to 0% while the incoming shot's opacity goes from 0% to 100%. An audio crossfade often accompanies the video cross-dissolve, with the first clip's audio fading out as the second's fades in to create a seamless sonic transition.

Usage and effects: The cross-dissolve can suggest passage of time, a change of location, a dream or memory, or a poetic mood. It can feel old-fashioned if overused and is sometimes avoided in contemporary editing in favor of quicker cuts or other transitions.

History and terminology: Although commonly called a dissolve, some editors distinguish between dissolves and cross-dissolves; cross-dissolve emphasizes simultaneous cross-blending of both image and sound. It is a standard feature in non-linear editing systems and is widely supported by video editors.

Variations and considerations: The duration is a key choice; too long can slow pacing; too short may feel abrupt. For film restoration and classic cinema, cross-dissolves may be used to emulate period style.