Room knocked out to black from the top down
A black block grows from the top corner downward in about 0.25 s, replacing the room behind the speaker while the speaker stays in place; a giant word wall then fills the black. Switching the speaker from the real room to a keyword wall (seen 0.3-0.55 s in the gym clip, 3.9 s in the promoter clip; room returns by a bottom-right wipe at about 7.0-7.3 s).
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Use this transition between my clips: "Room knocked out to black from the top down" from the 24fps video editor library.
Preset JSON: https://24fps.dev/video-editor/transitions/top-down-background-knockout-wipe-e3x/preset.json (pass its "preset" to the engine).
Engine (MIT, no dependencies, ES module): https://24fps.dev/editor/engine.js. Download the engine next to your page (curl -O) rather than importing cross-origin, then import { mount } from "./engine.js" in a <script type="module"> served over http.
Wiring: root = a position:relative box at the video's size. media = { a, b }: two wrappers holding clip A and clip B, both filling the root. Clip A plays first; the cut happens at preset.at (0.3s) over preset.dur (0.25s), so start clip B at preset.at. Then const fx = mount(root, { kind: "transition", preset, media }) and call fx.render(seconds) every frame. It is seek-safe: drive it from the GSAP timeline in HyperFrames or call render(frame / fps) in Remotion. Before capturing frames, await (fx.ready ?? document.fonts.ready).
Field reference: https://24fps.dev/video-editor/llms.txt. Keep sizes as fractions of the frame height so it works at any resolution. Credit: 24fps.dev/video-editor- Same idea
- Also called: Grit (AI Edit)
- Footage
- Man talking to camera, Pexels