How to join two clips with a transition made from what is in the shot
Tell Vizard Agent what is moving at the end of the first clip and what is moving at the start of the second. A transition built from those two movements, such as foam spilling forward and opening into the surf, reads as one continuous action, where an applied wipe always reads as an effect.
What do you type into Vizard Agent?
Name the two things in the same sentence. "Join these nicely" invites a cross-dissolve; "from the foam in the cup to the waves on the beach" tells Vizard Agent that the foam is the transition and not merely the last thing on screen. Ask for the audio to stay continuous, since joins fail on sound first.
Prompt
What does Vizard Agent actually do?
It looks at both ends of the join frame by frame and builds the boundary from what is already moving. A diagonal wipe moves a hard edge in a direction the picture never suggested; the foam's own shape doesn't. The first version works and the second is the one you want, which is normal here. In the session behind this article it:
- Sampled two clips only seconds long with denser frames, and studied the foam's movement at the end of the first and the waves' at the start of the second.
- Checked the effects library for a transition suited to two foam textures, and checked the audio so the join would not click.
- Rendered a first version with a soft diagonal transition, extended the remaining wave footage, crossfaded the audio and measured the final loudness.
- Went back to the join, reviewed the last of the foam and the first of the waves closely, and picked the region of foam to use as the shape of the flow.
- Held the spill moment longer, blended the real foam texture in to open into the surf, and confirmed the flow was visible and the ending tidy.
When does this not work well?
Some pairs have no rhyme to build on. If the two shots share no shape, texture or direction of movement, a constructed transition looks like an effect applied to hide a cut, and a plain cut is usually better. Static shots give a flow nothing to move, and very short clips leave the transition few frames to work with.
Common questions
What kinds of pairs work? Anything that rhymes, such as foam and surf or steam and cloud. Vizard Agent will say if yours does not.
Can it find the rhyme itself? Often, but naming it gives Vizard Agent a much better first attempt.
What if my clips are very short? Say so. Vizard Agent extends or holds footage rather than running out mid-transition.