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.opencode/skills/media-processing/SKILL.md

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+---
+name: ck:media-processing
+description: Process media with FFmpeg (video/audio), ImageMagick (images), RMBG (AI background removal). Use for encoding, format conversion, filters, thumbnails, batch processing, HLS/DASH streaming.
+license: MIT
+argument-hint: "[input-file] [operation]"
+metadata:
+  author: claudekit
+  version: "1.0.0"
+---
+
+# Media Processing Skill
+
+Process video, audio, and images using FFmpeg, ImageMagick, and RMBG CLI tools.
+
+**IMPORTANT:** Invoke "/ck:project-organization" skill to organize the outputs.
+
+## 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
+
+```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