AgentSkillsCN

ffmpeg-cli

借助FFmpeg实现全面的视频与音频处理。适用于：(1) 视频转码与格式转换，(2) 剪辑与片段合并，(3) 音频提取与编辑，(4) 缩略图与GIF生成，(5) 分辨率缩放与画质调整，(6) 添加字幕或水印，(7) 调整播放速度（慢速/快速），(8) 进行色彩校正与滤镜应用。

SKILL.md
--- frontmatter
name: ffmpeg-cli
description: Comprehensive video/audio processing with FFmpeg. Use for: (1) Video transcoding and format conversion, (2) Cutting and merging clips, (3) Audio extraction and manipulation, (4) Thumbnail and GIF generation, (5) Resolution scaling and quality adjustment, (6) Adding subtitles or watermarks, (7) Speed adjustment (slow/fast motion), (8) Color correction and filters.
metadata: {"clawdbot":{"emoji":"🎬","requires":{"bins":["ffmpeg"]},"install":[{"id":"brew","kind":"brew","formula":"ffmpeg","bins":["ffmpeg"],"label":"Install ffmpeg (brew)"}]}}

FFmpeg CLI

Quick Reference

TaskCommand
Cut video{baseDir}/scripts/cut.sh -i <input> -s <start> -e <end> -o <output>
Merge clips{baseDir}/scripts/merge.sh -o <output> <file1> <file2> ...
Extract audio{baseDir}/scripts/extract-audio.sh -i <video> -o <output.mp3>
Generate thumbnail{baseDir}/scripts/thumb.sh -i <video> -t <timestamp> -o <out.jpg>
Create GIF{baseDir}/scripts/gif.sh -i <video> -s <start> -e <end> -o <out.gif>
Convert format{baseDir}/scripts/convert.sh -i <input> -o <output.mp4>
Change speed{baseDir}/scripts/speed.sh -i <input> -r <0.5-2.0> -o <output>
Add watermark{baseDir}/scripts/watermark.sh -i <video> -w <image> -o <output>

Scripts

cut.sh - Cut video segment

bash
{baseDir}/scripts/cut.sh -i video.mp4 -s 00:01:30 -e 00:02:45 -o clip.mp4

merge.sh - Concatenate videos

bash
{baseDir}/scripts/merge.sh -o merged.mp4 part1.mp4 part2.mp4 part3.mp4

extract-audio.sh - Pull audio track

bash
{baseDir}/scripts/extract-audio.sh -i video.mp4 -o audio.mp3

thumb.sh - Extract frame as image

bash
{baseDir}/scripts/thumb.sh -i video.mp4 -t 00:00:15 -o frame.jpg

gif.sh - Convert clip to GIF

bash
{baseDir}/scripts/gif.sh -i video.mp4 -s 00:00:10 -e 00:00:15 -o clip.gif

convert.sh - Transcode to new format

bash
{baseDir}/scripts/convert.sh -i input.avi -o output.mp4

speed.sh - Adjust playback speed

bash
{baseDir}/scripts/speed.sh -i video.mp4 -r 2.0 -o fast.mp4  # 2x speed
{baseDir}/scripts/speed.sh -i video.mp4 -r 0.5 -o slow.mp4  # 0.5x speed

watermark.sh - Overlay image watermark

bash
{baseDir}/scripts/watermark.sh -i video.mp4 -w logo.png -o output.mp4

Notes

  • •All scripts support common video formats (mp4, avi, mov, mkv, webm, etc.)
  • •Output quality is optimized for balanced file size and clarity
  • •Use -h or no args to see script usage