# Spin — effect skill for transitions

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The frame rotates fast around its centre (with blur) and comes out of the spin on the next shot.

- **Type:** [Effect](https://varg.ai/how-to/effects.md) · [Transitions](https://varg.ai/how-to/browse/skills/transitions.md)
- **Slug:** `spin-rotate`
- **Status:** live
- **Publisher:** bread · GL Transitions (community)
- **License:** MIT
- **Source:** https://github.com/gl-transitions/gl-transitions/blob/master/transitions/Revolve.glsl
- **Works in:** Claude Code, Claude.ai, Codex, Cursor, OpenClaw, Gemini CLI, Any MCP client, varg Studio
- **Requires:** ffmpeg, HyperFrames (npx hyperframes), Remotion, CapCut (by hand)
- **Cost:** Free — the take renders locally; generated footage, if any, bills by the model

## What it does

Built on [Revolve](https://github.com/gl-transitions/gl-transitions/blob/master/transitions/Revolve.glsl) by bread (gl-transitions), MIT. The write-up and recipes below are varg's.

A spins 90–360° and blurs; B spins in from the same direction and stops upright.

**When:** Party, music, playful and transformation edits; matches footage with rotating motion.

**Watch out:** Long slow spins (nausea) and spinning text-heavy shots.

**Timing:** 0.3–0.8 s (CapCut Rotate CW II 0.8 s), ease-in-out

**Also called:** Rotate CW II, Rotate CCW II, Center Rotate, Axis Rotation, CW Swirl, spin transition, roll transition

### In FFmpeg

Spin out of A in its last 0.3 s, spin into B in its first 0.3 s (rotate's angle is a per-frame expression):
```bash
ffmpeg -i a.mp4 -i b.mp4 -filter_complex \
"[0:v]trim=0:5,setpts=PTS-STARTPTS,rotate=a='if(gte(t,4.7),PI*((t-4.7)/0.3)^2,0)',gblur=sigma=10:enable='gte(t,4.85)'[a];\
 [1:v]trim=0:4,setpts=PTS-STARTPTS,rotate=a='if(lt(t,0.3),-PI*(1-t/0.3)^2,0)',gblur=sigma=10:enable='lt(t,0.15)'[b];\
 [a][b]concat=n=2:v=1:a=0[v]" -map "[v]" out.mp4
```
Corners show `fillcolor` (black); scale both by 1.5 before rotating to hide them.

### In HyperFrames

```js
tl.to("#s1", { rotation: 180, scale: 1.4, filter: "blur(10px)", opacity: 0, duration: 0.35, ease: "power3.in" }, T);
tl.fromTo("#s2", { rotation: -180, scale: 1.4, filter: "blur(10px)", opacity: 0 }, { rotation: 0, scale: 1, filter: "blur(0px)", opacity: 1, duration: 0.35, ease: "power3.out" }, T);
```

### In Remotion

Custom presentation: `transform: rotate(${presentationProgress * 180}deg) scale(...)` on the exiting side, the reverse on the entering side; or `glTransition({name: 'Revolve_Left'})` (1.x name, see notes).

### In CapCut

Transitions tab → Camera → Rotate CW II, Rotate CCW II, Center Rotate, Axis Rotation, CW Swirl. 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

- [Revolve](https://skills.varg.ai/component/glt.revolve/) (gl-transitions): npm install gl-transitions
- [DreamyZoom](https://skills.varg.ai/component/glt.dreamy-zoom/) (gl-transitions): npm install gl-transitions
- [3D Transitions](https://skills.varg.ai/component/hf.transitions-3d/) (hyperframes): npx hyperframes add transitions-3d

### Where this comes from

- [FFmpeg filters: rotate](https://ffmpeg.org/ffmpeg-filters.html#rotate)
- [Remotion: custom presentations](https://www.remotion.dev/docs/transitions/presentations/custom)
- [CapCut Help: transitions](https://www.capcut.com/help/transitions-in-capcut)
- [CapCut: transition categories](https://capcut.com/resource/add-video-transition-online)
- [CapCut transition names + default durations (VectCut metadata)](https://github.com/sun-guannan/VectCutAPI/blob/main/pyJianYingDraft/metadata/capcut_transition_meta.py)
- [CapCut transition names incl. Pro (pyCapCut metadata)](https://github.com/GuanYixuan/pyCapCut/blob/main/pycapcut/metadata/transition_meta.py)

## Use when

- Party, music, playful and transformation edits; matches footage with rotating motion.

## Not for

- Long slow spins (nausea) and spinning text-heavy shots.

## 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://s3.varg.ai/how-to/previews/be5145756b9f/take-spin-rotate.mp4 — spin between two shots, with the timeline strip of the edit. Footage: Big Buck Bunny (2008), (c) copyright 2008, Blender Foundation | www.bigbuckbunny.org, CC BY 3.0; WING IT! (2023), Blender Studio | studio.blender.org, CC BY 4.0. (credit: Rendered by varg · Big Buck Bunny (2008) + WING IT! (2023))

## 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