Split and Slices — effect skill for transitions

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The frame breaks into bars that slide apart or open like doors, revealing the next shot.

What it does

Built on Doorway by gre (gl-transitions), MIT. The write-up and recipes below are varg's.

Two or more panels (horizontal, vertical or diagonal) move away from each other with B behind.

When: Tech, sport and editorial pieces; section openers.

Watch out: Many thin slices on detailed footage turn into visual noise.

Timing: 0.4–0.6 s (CapCut Split/Slices 0.47 s), power3.inOut

Also called: Split, Split III, Split IV, Horizontal Slice, Vertical Slices, Diagonal Slices, Open Horizontally, Open Vertically

In FFmpeg

Same size/fps/pixel format on both inputs (see the Normalize card). offset = duration(A) - T = 5.0 - 0.5 = 4.5.

ffmpeg -i a.mp4 -i b.mp4 -filter_complex \
"[0:v]fps=30,settb=AVTB,format=yuv420p[a];[1:v]fps=30,settb=AVTB,format=yuv420p[b];\
[a][b]xfade=transition=vertopen:duration=0.5:offset=4.5[v];\
[0:a][1:a]acrossfade=d=0.5[au]" \
  -map "[v]" -map "[au]" -c:v libx264 -crf 18 -c:a aac out.mp4

Doors: vertopen/vertclose/horzopen/horzclose. Staggered slices: hlslice, hrslice, vuslice, vdslice.

In HyperFrames

Block transitions-mechanical / transitions-grid; GL: Doorway (splits and swings open).

In Remotion

Custom presentation: render children twice, each clipped to half (clipPath: inset(0 50% 0 0) / inset(0 0 0 50%)), translating ±50% by presentationProgress on the exiting side.

In CapCut

Transitions tab → Split → Split, Split III, Split IV, Horizontal Slice, Vertical Slices, Diagonal Slices, Open Horizontally, Open Vertically. Desktop: drag the tile onto the cut between two clips and set Duration in the right panel ("Apply to all" reuses it on every cut). Mobile: tap the small white square between clips, pick the transition, drag the duration slider, tap ✓. Tab labels and placement change between versions and regions.

Ready-made components

Where this comes from

Use when

Not for

Install

Example output

https://s3.varg.ai/how-to/previews/d368426264f8/take-split-slices.mp4 — vertopen between two shots, with the timeline strip of the edit. Footage: Coffee Run (2020), Blender Studio | studio.blender.org, CC BY 4.0; WING IT! (2023), Blender Studio | studio.blender.org, CC BY 4.0. (credit: Rendered by varg · Coffee Run (2020) + WING IT! (2023))

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