Media Processing Skill
Process video, audio, and images using FFmpeg, ImageMagick, and RMBG CLI tools.
Tool Selection
Task Tool Reason
Video encoding/conversion FFmpeg Native codec support, streaming
Audio extraction/conversion FFmpeg Direct stream manipulation
Image resize/effects ImageMagick Optimized for still images
Background removal RMBG AI-powered, local processing
Batch images ImageMagick mogrify for in-place edits
Video thumbnails FFmpeg Frame extraction built-in
GIF creation FFmpeg/ImageMagick FFmpeg for video, ImageMagick for images
Installation
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
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:
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-c:v libx264
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H.264 codec
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-crf 22
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Quality (0-51, lower=better)
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-preset slow
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Speed/compression balance
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-c:a aac
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Audio codec
ImageMagick:
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800x600
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Fit within (maintains aspect)
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800x600^
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Fill (may crop)
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-quality 85
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JPEG quality
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-strip
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Remove metadata
RMBG:
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-m briaai
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High quality model
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-m u2netp
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Fast model
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-r 4096
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Max resolution
References
Detailed guides in references/ :
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ffmpeg-encoding.md
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Codecs, quality, hardware acceleration
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ffmpeg-streaming.md
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HLS/DASH, live streaming
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ffmpeg-filters.md
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Filters, complex filtergraphs
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imagemagick-editing.md
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Effects, transformations
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imagemagick-batch.md
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Batch processing, parallel ops
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rmbg-background-removal.md
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AI models, CLI usage
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common-workflows.md
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Video optimization, responsive images, GIF creation
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troubleshooting.md
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Error fixes, performance tips
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format-compatibility.md
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Format support, codec recommendations