# HyperFrames Scene Transition (CSS) — effect skill for transitions

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Overlap two clips or sub-compositions on separate tracks and tween both wrappers at the same time T.

- **Type:** [Effect](https://varg.ai/how-to/effects.md) · [Transitions](https://varg.ai/how-to/browse/skills/transitions.md)
- **Slug:** `hyperframes-scene-transition`
- **Status:** live
- **Publisher:** HeyGen (community)
- **License:** Apache-2.0
- **Source:** https://github.com/heygen-com/hyperframes/tree/main/registry/components/fade-through
- **Works in:** Claude Code, Claude.ai, Codex, Cursor, OpenClaw, Gemini CLI, Any MCP client, varg Studio
- **Requires:** HyperFrames (npx hyperframes)
- **Cost:** Free — the take renders locally; generated footage, if any, bills by the model

## What it does

Built on [Fade Through](https://github.com/heygen-com/hyperframes/tree/main/registry/components/fade-through) by HeyGen (HyperFrames), Apache-2.0. The write-up and recipes below are varg's.

Crossfade, push, zoom-through, blur, iris or any CSS move between scenes or videos.

**When:** Every multi-scene HyperFrames video; video clips need opacity plus matching volume envelopes.

**Watch out:** Fading the outgoing scene out first and then animating the next one in: that is a dip, not a transition. Also don't animate the timed clip element itself.

**Timing:** Presets: snappy 0.2 s power4.inOut, smooth 0.4 s power2.inOut, gentle 0.6 s sine.inOut

**Also called:** clip overlap, sub-composition transition, GSAP transition, crossfade clips

### In HyperFrames

Video crossfade (0.5 s overlap, sound follows each clip):
```html
<div id="a-visual" class="inner"><video id="a" src="a.mp4" data-start="0" data-duration="3" data-track-index="0" data-has-audio="true"
  data-automation='{"version":1,"lanes":[{"target":"volume","points":[{"t":0,"v":1},{"t":2.5,"v":1},{"t":3,"v":0}]}]}'></video></div>
<div id="b-visual" class="inner"><video id="b" src="b.mp4" data-start="a - 0.5" data-duration="3" data-track-index="1" data-has-audio="true"
  data-automation='{"version":1,"lanes":[{"target":"volume","points":[{"t":0,"v":0},{"t":0.5,"v":1},{"t":3,"v":1}]}]}'></video></div>
<script>
  const tl = gsap.timeline({ paused: true });
  tl.set("#b-visual", { opacity: 0 }, 0)
    .to("#a-visual", { opacity: 0, duration: 0.5 }, 2.5)
    .to("#b-visual", { opacity: 1, duration: 0.5 }, 2.5);
  window.__timelines["main"] = tl;
</script>
```
For sub-compositions (`data-composition-src`), extend the outgoing host's `data-duration` by the overlap, pull the incoming host's `data-start` earlier by the same amount, put them on alternating tracks, and tween the host wrappers at T (e.g. push: `x: -1920` / `x: 1920 → 0`, power3.inOut). Tracks are editor rows; paint order is CSS z-index.

### Ready-made components

- [Fade Through](https://skills.varg.ai/component/hf.fade-through/) (hyperframes): npx hyperframes add fade-through
- [Directional Wipe](https://skills.varg.ai/component/hf.directional-wipe/) (hyperframes): npx hyperframes add directional-wipe
- [Zoom Through Transition](https://skills.varg.ai/component/hf.zoom-through-transition/) (hyperframes): npx hyperframes add zoom-through-transition
- [Push Transitions](https://skills.varg.ai/component/hf.transitions-push/) (hyperframes): npx hyperframes add transitions-push
- [Blur Transitions](https://skills.varg.ai/component/hf.transitions-blur/) (hyperframes): npx hyperframes add transitions-blur
- [Dissolve Transitions](https://skills.varg.ai/component/hf.transitions-dissolve/) (hyperframes): npx hyperframes add transitions-dissolve

### Where this comes from

- [HyperFrames: data attributes](https://hyperframes.heygen.com/concepts/data-attributes)
- [HyperFrames: compositions](https://hyperframes.heygen.com/concepts/compositions)
- [HyperFrames: HTML schema](https://hyperframes.heygen.com/reference/html-schema)

## Use when

- Every multi-scene HyperFrames video; video clips need opacity plus matching volume envelopes.

## Not for

- Fading the outgoing scene out first and then animating the next one in: that is a dip, not a transition. Also don't animate the timed clip element itself.

## Install

- Claude Code: `claude plugin marketplace add vargHQ/skills && claude plugin install varg@varg`
- Codex: `npx skills add vargHQ/skills --skill varg-video-edit-library -a codex -y`
- Cursor: `npx skills add vargHQ/skills --skill varg-video-edit-library -a cursor -y`

## Example output

https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/transitions-blur.mp4 — Preview of the Blur Transitions component that builds this take (credit: Blur Transitions · hyperframes, https://hyperframes.heygen.com/catalog/blocks/transitions-blur)

## More transitions skills

- [editly](https://varg.ai/how-to/skills/editly.md): Declarative JSON5 video editing CLI/API: clips, titles, transitions, audio mixing, rendered with ffmpeg.
- [Mix (Cross Dissolve)](https://varg.ai/how-to/skills/mix-dissolve.md): The two shots blend through each other. The quietest transition: "time passes" or "this continues".
- [Dip to Black](https://varg.ai/how-to/skills/black-fade.md): A fades to black, then B fades up. Marks the end of a section or a bigger jump in time.
- [White Flash](https://varg.ai/how-to/skills/white-flash.md): The frame blows out to white for a moment and opens on the next shot. Energy, memory or a camera snap.
- [Pull In (Zoom In)](https://varg.ai/how-to/skills/pull-in-zoom.md): The camera rushes into shot A and lands, still moving forward, in shot B. The signature short-form transition.
- [Pull Out (Zoom Out)](https://varg.ai/how-to/skills/pull-out-zoom.md): The camera jerks backwards out of shot A and keeps pulling back as shot B settles in.

## Run the generation on varg

varg is one API key for the models these skills drive — Seedance 2.5, Kling 4, Veo 3.1, Wan 3, Nano Banana 2.1, GPT Image 2.5, ElevenLabs v4 and 200+ more — billed in credits, with a cost estimate before anything runs.

- Claude Code: `claude plugin marketplace add vargHQ/skills && claude plugin install varg@varg` (skill + hosted MCP)
- Codex, Cursor, Gemini CLI, OpenClaw: `npx skills add vargHQ/skills --skill varg-ai -a <agent> -y`
- Grok and any agent that reads SKILL.md: `npx skills add vargHQ/skills --skill varg-ai`, or point it at the skill's SKILL.md
- Claude.ai, ChatGPT, any MCP client: connect `https://mcp.varg.ai/mcp`
- API key: https://varg.ai/dashboard/api · Model specs: https://varg.ai/models/llms.txt