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FFmpeg fundamentals for video/audio manipulation. Covers common operations (trim, concat, convert, extract), codec selection, filter chains, and performance optimization. Use when planning or executing video processing tasks.
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npx skills add https://github.com/MadAppGang/claude-code --skill ffmpeg-coreコマンドは1行のまま表示されます。コピー前に横へスクロールして全体を確認してください。
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Use when starting isolated feature work or before executing implementation plans. Manages full worktree lifecycle from creation through cleanup with safety checks and error recovery.
Configuration reference and troubleshooting for the statusline plugin — sections, themes, bar widths, and script architecture
Common agent patterns and templates for Claude Code. Use when implementing agents to follow proven patterns for Tasks integration, quality checks, and external model invocation via claudish CLI.
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SKILL.md を表示中
| name | ffmpeg-core |
| description | FFmpeg fundamentals for video/audio manipulation. Covers common operations (trim, concat, convert, extract), codec selection, filter chains, and performance optimization. Use when planning or executing video processing tasks. |
plugin: video-editing updated: 2026-01-20
Production-ready patterns for video and audio manipulation using FFmpeg.
ffmpeg -versionffmpeg -hwaccelsmacOS:
brew install ffmpeg
Linux (Ubuntu/Debian):
sudo apt update && sudo apt install ffmpeg
Linux (Fedora/RHEL):
sudo dnf install ffmpeg
Windows:
# Using Chocolatey
choco install ffmpeg
# Or download from https://ffmpeg.org/download.html
Extract metadata and stream information:
# Get full metadata
ffprobe -v quiet -print_format json -show_format -show_streams "input.mp4"
# Get duration only
ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1
ffprobe -v error -select_streams v:0 -show_entries stream=width,height -of csv=s=x:p=0
# Trim by time (fast, no re-encoding)
ffmpeg -ss 00:01:30 -i input.mp4 -to 00:02:45 -c copy output.mp4
# Trim with re-encoding (frame-accurate)
ffmpeg -ss 00:01:30 -i input.mp4 -to 00:02:45 -c:v libx264 -c:a aac output.mp4
# Extract specific segment by frames
ffmpeg -i input.mp4 -vf "select=between(n\,100\,500)" -vsync vfr output.mp4
# Using concat demuxer (same codecs required)
# First create file list:
# file 'clip1.mp4'
# file 'clip2.mp4'
# file 'clip3.mp4'
ffmpeg -f concat -safe 0 -i filelist.txt -c copy output.mp4
# Using concat filter (different codecs, re-encodes)
ffmpeg -i clip1.mp4 -i clip2.mp4 -filter_complex "[0:v][0:a][1:v][1:a]concat=n=2:v=1:a=1" output.mp4
# MP4 to MOV (ProRes for FCP)
ffmpeg -i input.mp4 -c:v prores_ks -profile:v 3 -c:a pcm_s16le output.mov
# Any to H.264 MP4 (web-friendly)
ffmpeg -i input.avi -c:v libx264 -preset medium -crf 23 -c:a aac -b:a 128k output.mp4
# Extract audio only
ffmpeg -i video.mp4 -vn -c:a libmp3lame -q:a 2 audio.mp3
ffmpeg -i video.mp4 -vn -c:a pcm_s16le audio.wav
# Scale to specific resolution
ffmpeg -i input.mp4 -vf "scale=1920:1080" output.mp4
# Scale maintaining aspect ratio
ffmpeg -i input.mp4 -vf "scale=1920:-1" output.mp4
# Scale to fit within bounds
ffmpeg -i input.mp4 -vf "scale='min(1920,iw)':min'(1080,ih)':force_original_aspect_ratio=decrease" output.mp4
# Adjust volume
ffmpeg -i input.mp4 -af "volume=1.5" output.mp4
# Normalize audio (loudnorm)
ffmpeg -i input.mp4 -af loudnorm=I=-16:TP=-1.5:LRA=11 output.mp4
# Mix audio tracks
ffmpeg -i video.mp4 -i audio.mp3 -filter_complex "[0:a][1:a]amerge=inputs=2" -c:v copy output.mp4
# Replace audio
ffmpeg -i video.mp4 -i new_audio.mp3 -c:v copy -map 0:v:0 -map 1:a:0 output.mp4
# Fade in/out
ffmpeg -i input.mp4 -vf "fade=t=in:st=0:d=1,fade=t=out:st=9:d=1" output.mp4
# Speed adjustment (2x faster)
ffmpeg -i input.mp4 -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" output.mp4
# Add text overlay
ffmpeg -i input.mp4 -vf "drawtext=text='Title':fontsize=48:fontcolor=white:x=(w-text_w)/2:y=50" output.mp4
# Color correction
ffmpeg -i input.mp4 -vf "eq=brightness=0.1:saturation=1.2:contrast=1.1" output.mp4
| Use Case | Video Codec | Audio Codec | Container |
|---|---|---|---|
| Web delivery | libx264/libx265 | aac | mp4 |
| Final Cut Pro | prores_ks | pcm_s16le | mov |
| Archive/lossless | ffv1 | flac | mkv |
| Quick preview | libx264 -preset ultrafast | aac | mp4 |
| Social media | libx264 -crf 20 | aac -b:a 192k | mp4 |
| Profile | Flag | Quality | Use Case |
|---|---|---|---|
| Proxy | -profile:v 0 | Low | Offline editing |
| LT | -profile:v 1 | Medium | Light grading |
| Standard | -profile:v 2 | High | General editing |
| HQ | -profile:v 3 | Very High | Final delivery |
| 4444 | -profile:v 4 | Highest | VFX/compositing |
# Use hardware acceleration (macOS)
ffmpeg -hwaccel videotoolbox -i input.mp4 -c:v h264_videotoolbox output.mp4
# Use hardware acceleration (Linux with NVIDIA)
ffmpeg -hwaccel cuda -i input.mp4 -c:v h264_nvenc output.mp4
# Parallel processing
ffmpeg -i input.mp4 -threads 0 output.mp4
# Limit memory usage
ffmpeg -i input.mp4 -max_muxing_queue_size 1024 output.mp4
# Check if file is valid video
ffprobe -v error -select_streams v:0 -show_entries stream=codec_type -of csv=p=0 "file.mp4" 2>/dev/null
# Returns "video" if valid
# Validate output after processing
validate_video() {
local file="$1"
if ffprobe -v error -select_streams v:0 -show_entries stream=codec_type -of csv=p=0 "$file" 2>/dev/null | grep -q "video"; then
echo "Valid"
return 0
else
echo "Invalid or missing video stream"
return 1
fi
}