# Cut Clip

> Trim a video to a [t0, t1] time range using ffmpeg. Stream-copies where possible to avoid re-encoding. Use as the cheap building block for cutting source video into per-short slices.

- Skill: `jperrello/cut-clip` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add jperrello/cut-clip`
- Raw SKILL.md: https://api.skillmd.com/api/skills/jperrello/cut-clip/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: jperrello (https://skillmd.com/u/jperrello)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/jperrello/cut-clip

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# cut-clip

Thin ffmpeg trim wrapper.

## Inputs
- `input`: video path
- `t0`: start seconds (float)
- `t1`: end seconds (float)
- `out`: output path
- `reencode` (optional): bool, default `false`. Set true if cut must be frame-accurate at a non-keyframe.

## Output
mp4 cut to the requested range.

## How
- Default (stream copy, fast, ±1 keyframe accuracy):
  `ffmpeg -ss <t0> -to <t1> -i <in> -c copy -avoid_negative_ts make_zero <out>`
- Re-encode (frame-accurate):
  `ffmpeg -i <in> -ss <t0> -to <t1> -c:v libx264 -preset veryfast -crf 18 -c:a aac <out>`

## Invoke
`.claude/skills/cut-clip/cut-clip.sh <input> <t0> <t1> <out> [reencode]`

Idempotent via mtime check (skips when out is newer than input).