{'>'}_
English 繁體中文 日本語 한국어 Deutsch Español Français
Login

Video editing skill for OpenClaw, Claude Code, and Codex — trim, jump cut, caption (Hormozi/standard/minimal), text overlay, and speed change videos using natural language. Pure Bash + FFmpeg + Whisper. Used and tested with OpenClaw.

6 stars
2 forks
Shell
25 views
View on GitHub Add to Favorites

SKILL.md

Video Editing

Edit videos using natural language instructions. Supports trimming, jump cuts (silence removal), captions with multiple styles, text overlays, and speed changes — all powered by ffmpeg and Whisper.

Usage

Give a video file path and describe what you want done:

Edit my video at ~/video.mp4 — remove silence, add Hormozi-style captions, and speed it up 1.25x

Trim ~/interview.mp4 from 00:02:00 to 00:15:00 and add standard captions

Add a "Subscribe!" text overlay at the 1 minute mark in ~/video.mp4

Capabilities

Trimming

Cut video to specific start/end timestamps or duration.

scripts/trim.sh video.mp4 --start 00:01:30 --end 00:05:00

Jump Cuts (Silence Removal)

Auto-detect and remove silent/dead-air sections. Configurable threshold, minimum silence duration, and padding.

scripts/jumpcut.sh video.mp4 --threshold -30 --duration 0.5 --padding 0.1

Captions

Transcribe audio with Whisper, then burn subtitles into video. Three caption styles:

Style Description
hormozi Bold, centered, large — Alex Hormozi word-by-word impact style
standard Traditional bottom subtitles with semi-transparent background
minimal Small lower-third captions, clean and unobtrusive 
scripts/transcribe.sh video.mp4 --model base --language en
scripts/caption.sh video.mp4 video.srt --style hormozi

Text Overlays

Add text at specific positions and timestamps. Supports 7 positions: center, top, bottom, top-left, top-right, bottom-left, bottom-right.

scripts/overlay-text.sh video.mp4 --text "Subscribe!" --start 00:01:00 --end 00:01:05 --position bottom-right

Speed Changes

Adjust playback speed (audio pitch-corrected via atempo).

# Via edit.sh orchestrator
scripts/edit.sh video.mp4 --speed 1.5

Full Pipeline (Orchestrator)

Chain multiple operations in a single command:

scripts/edit.sh video.mp4 \
  --trim-start 00:00:10 --trim-end 00:10:00 \
  --jumpcut \
  --caption --caption-style hormozi \
  --speed 1.25 \
  --overlay-text "Like & Subscribe" --overlay-start 00:01:00 \
  --output final.mp4

Pipeline order: trim → jump cut → speed → caption → overlay

Requirements

  • ffmpeg — video processing (must be installed)
  • whisper — audio transcription for captions (openai-whisper CLI)

Scripts Reference

Script Purpose
scripts/edit.sh Main orchestrator — chains all operations
scripts/transcribe.sh Whisper transcription → SRT file
scripts/caption.sh Burn SRT captions into video with style
scripts/trim.sh Trim by timestamps
scripts/jumpcut.sh Auto-remove silence via silencedetect
scripts/overlay-text.sh Add positioned text overlays

Agent Instructions

When the user asks to edit a video:

  1. Parse the request — identify which operations are needed (trim, jumpcut, caption, overlay, speed)
  2. Use edit.sh for multi-operation edits — it chains operations in the correct order
  3. Use individual scripts for single operations — faster, simpler output
  4. For captions: if the user has an existing SRT, use --caption-srt; otherwise transcription runs automatically
  5. Default caption style: use "standard" unless the user specifies a style
  6. Default whisper model: use "base" for speed; suggest "medium" or "large" for accuracy on long/noisy videos
  7. Output: always tell the user the output file path and duration