AgentSkillsCN

media-processing

利用 FFmpeg（视频/音频编码、转换、流媒体传输、滤镜处理、硬件加速）、ImageMagick（图像处理、格式转换、批量处理、特效应用、图像合成）以及 RMBG（AI 驱动的背景移除）处理多媒体文件。适用于媒体格式转换、采用特定编解码器（H.264、H.265、VP9）对视频进行编码、调整或裁剪图像、去除图像背景、从视频中提取音频、应用滤镜与特效、优化文件大小、生成流媒体清单（HLS/DASH）、生成缩略图、批量处理图像、创建合成图像，或搭建完整的媒体处理流水线。支持百余种文件格式，兼容 NVENC、QSV 等硬件加速技术，并可灵活运用复杂的滤镜链。

SKILL.md
--- frontmatter
name: media-processing
description: Process multimedia files with FFmpeg (video/audio encoding, conversion, streaming, filtering, hardware acceleration), ImageMagick (image manipulation, format conversion, batch processing, effects, composition), and RMBG (AI-powered background removal). Use when converting media formats, encoding videos with specific codecs (H.264, H.265, VP9), resizing/cropping images, removing backgrounds from images, extracting audio from video, applying filters and effects, optimizing file sizes, creating streaming manifests (HLS/DASH), generating thumbnails, batch processing images, creating composite images, or implementing media processing pipelines. Supports 100+ formats, hardware acceleration (NVENC, QSV), and complex filtergraphs.
license: MIT

Media Processing Skill

Process video, audio, and images using FFmpeg, ImageMagick, and RMBG CLI tools.

Tool Selection

TaskToolReason
Video encoding/conversionFFmpegNative codec support, streaming
Audio extraction/conversionFFmpegDirect stream manipulation
Image resize/effectsImageMagickOptimized for still images
Background removalRMBGAI-powered, local processing
Batch imagesImageMagickmogrify for in-place edits
Video thumbnailsFFmpegFrame extraction built-in
GIF creationFFmpeg/ImageMagickFFmpeg for video, ImageMagick for images

Installation

bash
# macOS
brew install ffmpeg imagemagick
npm install -g rmbg-cli

# Ubuntu/Debian
sudo apt-get install ffmpeg imagemagick
npm install -g rmbg-cli

# Verify
ffmpeg -version && magick -version && rmbg --version

Essential Commands

bash
# Video: Convert/re-encode
ffmpeg -i input.mkv -c copy output.mp4
ffmpeg -i input.avi -c:v libx264 -crf 22 -c:a aac output.mp4

# Video: Extract audio
ffmpeg -i video.mp4 -vn -c:a copy audio.m4a

# Image: Convert/resize
magick input.png output.jpg
magick input.jpg -resize 800x600 output.jpg

# Image: Batch resize
mogrify -resize 800x -quality 85 *.jpg

# Background removal
rmbg input.jpg                          # Basic (modnet)
rmbg input.jpg -m briaai -o output.png  # High quality
rmbg input.jpg -m u2netp -o output.png  # Fast

Key Parameters

FFmpeg:

  • •-c:v libx264 - H.264 codec
  • •-crf 22 - Quality (0-51, lower=better)
  • •-preset slow - Speed/compression balance
  • •-c:a aac - Audio codec

ImageMagick:

  • •800x600 - Fit within (maintains aspect)
  • •800x600^ - Fill (may crop)
  • •-quality 85 - JPEG quality
  • •-strip - Remove metadata

RMBG:

  • •-m briaai - High quality model
  • •-m u2netp - Fast model
  • •-r 4096 - Max resolution

References

Detailed guides in references/:

  • •ffmpeg-encoding.md - Codecs, quality, hardware acceleration
  • •ffmpeg-streaming.md - HLS/DASH, live streaming
  • •ffmpeg-filters.md - Filters, complex filtergraphs
  • •imagemagick-editing.md - Effects, transformations
  • •imagemagick-batch.md - Batch processing, parallel ops
  • •rmbg-background-removal.md - AI models, CLI usage
  • •common-workflows.md - Video optimization, responsive images, GIF creation
  • •troubleshooting.md - Error fixes, performance tips
  • •format-compatibility.md - Format support, codec recommendations