Ffmpeg Color Grading Chromakey
Complete color manipulation and green screen effects system.
Install
npx skills add ynulihao/AgentSkillOS --skill ffmpeg-color-grading-chromakey -g -a claude-code -y- Repository
- ynulihao/AgentSkillOS618
- Category
- Engineering
- Updated
- 8mo ago
- License
- See repository
- Context cost
- Mediumabout 3,000 tokens
- Runs scripts
- No, instructions only
What it does
Complete color manipulation and green screen effects system. PROACTIVELY activate for: (1) Green screen/chromakey removal, (2) Color grading with LUTs, (3) Color correction (levels, curves, white balance), (4) Colorkey/color removal effects, (5) Hue/saturation manipulation, (6) Color space conversions (BT.709, BT.2020, HDR), (7) Color isolation effects, (8) Teal and orange look, (9) Vintage/film looks, (10) Color keying for transparency. Provides: chromakey and colorkey filters, LUT application (lut3d), curves and levels adjustment, color balance, selective color manipulation, color space handling, HDR tone mapping, professional color grading chains.
CRITICAL GUIDELINES
Windows File Path Requirements
MANDATORY: Always Use Backslashes on Windows for File Paths
When using Edit or Write tools on Windows, you MUST use backslashes (\) in file paths, NOT forward slashes (/).
Quick Reference
| Task | Command |
|---|---|
| Green screen removal | -vf "chromakey=0x00FF00:0.3:0.1" |
| Blue screen removal | -vf "chromakey=0x0000FF:0.3:0.1" |
| Apply LUT | -vf "lut3d=cinematic.cube" |
| Color curves | -vf "curves=preset=vintage" |
| Adjust saturation | -vf "eq=saturation=1.5" |
| Hue shift | -vf "hue=h=30" |
| White balance | -vf "colortemperature=6500" |
When to Use This Skill
Use for color manipulation operations:
- Removing green/blue screen backgrounds
- Applying LUT color grading
- Color correction and enhancement
- Creating cinematic color looks
- HDR/SDR conversions
- Color keying for compositing
FFmpeg Color Grading & Chromakey (2025)
Complete guide to color manipulation, green screen removal, LUT grading, and advanced color effects with FFmpeg.
Green Screen (Chromakey) Removal
Basic Chromakey
# Remove green screen (standard green 0x00FF00)
ffmpeg -i foreground.mp4 -i background.mp4 \
-filter_complex "[0:v]chromakey=0x00FF00:0.3:0.1[fg];[1:v][fg]overlay" \
-c:v libx264 -crf 18 output.mp4
# Parameters:
# - color: The key color (hex 0xRRGGBB)
# - similarity: How close to key color (0.0-1.0, lower = more precise)
# - blend: Edge softness (0.0-1.0, higher = softer edges)
Chromakey Parameter Tuning
# Tight key (clean edges, may leave green fringe)
ffmpeg -i green_screen.mp4 -i background.jpg \
-filter_complex "[0:v]chromakey=0x00FF00:0.1:0.0[fg];[1:v][fg]overlay" \
output.mp4
# Loose key (removes all green, may eat into subject)
ffmpeg -i green_screen.mp4 -i background.jpg \
-filter_complex "[0:v]chromakey=0x00FF00:0.5:0.2[fg];[1:v][fg]overlay" \
output.mp4
