# Cut on Action — effect skill for cuts & pacing

> **For AI agents:** find the right skill in one call — `curl -s "https://varg.ai/how-to/api/search?q=<what the person wants>"` returns the matching how-to page and the best skills with install commands, as markdown (Russian works too). Full index: https://varg.ai/how-to/llms.txt. Every page has a markdown twin: add `.md` to its path. Before generating anything, show the person the options on the how-to page.

Change angle while the subject moves. The movement hides the cut and keeps continuity.

- **Type:** [Effect](https://varg.ai/how-to/effects.md) · [Cuts & pacing](https://varg.ai/how-to/browse/skills/cuts.md)
- **Slug:** `cut-on-action`
- **Status:** live
- **Publisher:** HeyGen (community)
- **License:** Apache-2.0
- **Source:** https://github.com/heygen-com/hyperframes/tree/main/registry/components/cut-the-curve
- **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 [Cut the Curve](https://github.com/heygen-com/hyperframes/tree/main/registry/components/cut-the-curve) by HeyGen (HyperFrames), Apache-2.0. The write-up and recipes below are varg's.

Wide to close-up as a hand reaches, a person sits or a head turns; viewers watch the motion, not the edit.

**When:** Any coverage of the same action from two angles: interviews, cooking, product handling, sport.

**Watch out:** Cutting before the movement starts or after it ends loses the cover; cut in the first third of the motion.

**Timing:** Cut 2–4 frames after movement begins; overlap a frame or two of action

**Also called:** cutting on action, continuity cut, movement cut

### In FFmpeg

Same as a hard cut: pick the out-frame on A and in-frame on B inside the motion (`trim=end_frame=` / `trim=start_frame=`).

### In HyperFrames

Two `<video>` clips with `data-media-start` chosen so the move continues; `data-start="a"` keeps them butted.

### In Remotion

Use `<Series>`; preview at full speed, the cut must be judged in motion.

### In CapCut

Split both angles at the motion point; multi-camera clips can also be lined up on stacked tracks and cut between.

### Ready-made components

- [Cut the Curve](https://skills.varg.ai/component/hf.cut-the-curve/) (hyperframes): npx hyperframes add cut-the-curve

### Where this comes from

- [Wikipedia: cutting on action](https://en.wikipedia.org/wiki/Cutting_on_action)
- [Walter Murch, In the Blink of an Eye (rule of six)](https://en.wikipedia.org/wiki/In_the_Blink_of_an_Eye_(Murch_book))
- [FFmpeg filters: trim](https://ffmpeg.org/ffmpeg-filters.html#trim)

## Use when

- Any coverage of the same action from two angles: interviews, cooking, product handling, sport.

## Not for

- Cutting before the movement starts or after it ends loses the cover; cut in the first third of the motion.

## 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/43ae2bd422fc/take-cut-on-action.mp4 — cut between two shots, with the timeline strip of the edit. Footage: WING IT! (2023), 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 · WING IT! (2023))

## More cuts & pacing skills

- [SmartCut (capcut-ai-editor)](https://varg.ai/how-to/skills/capcut-smartcut-mcp.md): MCP that reads CapCut auto-captions to cut silences and duplicate takes right inside your CapCut project.
- [Auto-Editor](https://varg.ai/how-to/skills/auto-editor.md): CLI that cuts dead space by loudness or motion and exports MP4 or editor timelines; now also an agent skill.
- [AutoCut](https://varg.ai/how-to/skills/autocut.md): Edit video in a text editor: Whisper transcribes, you delete lines in Markdown, AutoCut cuts the video.
- [Cut Video](https://varg.ai/how-to/skills/cut-video.md): Claude Code skill that tightens long recordings with forced-aligned cuts, keeping laughs and comedic pauses.
- [Videogrep](https://varg.ai/how-to/skills/videogrep.md): Search spoken words across videos and auto-build supercuts of every match.
- [PySceneDetect](https://varg.ai/how-to/skills/pyscenedetect.md): Find cuts, fades and scene changes in a video, then split it or export scene lists for the edit.

## 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
