From samhvw8-dot-claude
Video/audio/image processing with FFmpeg and ImageMagick. Tools: FFmpeg (video/audio), ImageMagick (images). Capabilities: format conversion, encoding (H.264/H.265/VP9/AV1), streaming (HLS/DASH), filters, effects, thumbnails, watermarks, batch processing, hardware acceleration (NVENC/QSV). Actions: convert, encode, resize, crop, compress, extract, merge, stream, transcode media. Keywords: FFmpeg, ImageMagick, video encoding, audio extraction, image resize, thumbnail, watermark, HLS, DASH, H.264, H.265, VP9, AV1, codec, bitrate, framerate, resolution, aspect ratio, filter, overlay, concat, trim, fade, batch processing. Use when: converting video/audio formats, encoding with specific codecs, generating thumbnails, creating streaming manifests, extracting audio from video, batch processing images, adding watermarks, optimizing file sizes.
npx claudepluginhub joshuarweaver/cascade-code-languages-misc-1 --plugin samhvw8-dot-claudeThis skill uses the workspace's default tool permissions.
Process video, audio, and images using FFmpeg and ImageMagick command-line tools for conversion, optimization, streaming, and manipulation tasks.
references/ffmpeg-encoding.mdreferences/ffmpeg-filters.mdreferences/ffmpeg-streaming.mdreferences/format-compatibility.mdreferences/imagemagick-batch.mdreferences/imagemagick-editing.mdscripts/batch_resize.pyscripts/media_convert.pyscripts/requirements.txtscripts/tests/requirements.txtscripts/tests/test_batch_resize.pyscripts/tests/test_media_convert.pyscripts/tests/test_video_optimize.pyscripts/video_optimize.pySearches, retrieves, and installs Agent Skills from prompts.chat registry using MCP tools like search_skills and get_skill. Activates for finding skills, browsing catalogs, or extending Claude.
Searches prompts.chat for AI prompt templates by keyword or category, retrieves by ID with variable handling, and improves prompts via AI. Use for discovering or enhancing prompts.
Checks Next.js compilation errors using a running Turbopack dev server after code edits. Fixes actionable issues before reporting complete. Replaces `next build`.
Process video, audio, and images using FFmpeg and ImageMagick command-line tools for conversion, optimization, streaming, and manipulation tasks.
Use when:
Use FFmpeg for:
Use ImageMagick for:
| Task | Tool | Why |
|---|---|---|
| Video encoding | FFmpeg | Native video codec support |
| Audio extraction | FFmpeg | Direct stream manipulation |
| Image resize | ImageMagick | Optimized for still images |
| Batch images | ImageMagick | mogrify for in-place edits |
| Video thumbnails | FFmpeg | Frame extraction built-in |
| GIF creation | FFmpeg or ImageMagick | FFmpeg for video source, ImageMagick for images |
| Streaming | FFmpeg | Live streaming protocols |
| Image effects | ImageMagick | Rich filter library |
brew install ffmpeg imagemagick
sudo apt-get install ffmpeg imagemagick
# Using winget
winget install ffmpeg
winget install ImageMagick.ImageMagick
# Or download binaries
# FFmpeg: https://ffmpeg.org/download.html
# ImageMagick: https://imagemagick.org/script/download.php
ffmpeg -version
ffprobe -version
magick -version
# or
convert -version
# Convert format (copy streams, fast)
ffmpeg -i input.mkv -c copy output.mp4
# Re-encode with H.264
ffmpeg -i input.avi -c:v libx264 -crf 22 -c:a aac output.mp4
# Resize video to 720p
ffmpeg -i input.mp4 -vf scale=-1:720 -c:a copy output.mp4
# Extract audio (no re-encoding)
ffmpeg -i video.mp4 -vn -c:a copy audio.m4a
# Convert to MP3
ffmpeg -i video.mp4 -vn -q:a 0 audio.mp3
# Convert format
magick input.png output.jpg
# Resize maintaining aspect ratio
magick input.jpg -resize 800x600 output.jpg
# Create square thumbnail
magick input.jpg -resize 200x200^ -gravity center -extent 200x200 thumb.jpg
# Resize all JPEGs to 800px width
mogrify -resize 800x -quality 85 *.jpg
# Output to separate directory
mogrify -path ./output -resize 800x600 *.jpg
# Extract frame at 5 seconds
ffmpeg -ss 00:00:05 -i video.mp4 -vframes 1 -vf scale=320:-1 thumb.jpg
# Generate HLS playlist
ffmpeg -i input.mp4 \
-c:v libx264 -preset fast -crf 22 -g 48 \
-c:a aac -b:a 128k \
-f hls -hls_time 6 -hls_playlist_type vod \
playlist.m3u8
# Add watermark to corner
magick input.jpg watermark.png -gravity southeast \
-geometry +10+10 -composite output.jpg
# H.264 with good compression
ffmpeg -i input.mp4 \
-c:v libx264 -preset slow -crf 23 \
-c:a aac -b:a 128k \
-movflags +faststart \
output.mp4
# Generate multiple sizes
for size in 320 640 1024 1920; do
magick input.jpg -resize ${size}x -quality 85 "output-${size}w.jpg"
done
# From 1:30 to 3:00 (re-encode for precision)
ffmpeg -i input.mp4 -ss 00:01:30 -to 00:03:00 \
-c:v libx264 -c:a aac output.mp4
# Convert PNG to optimized JPEG
mogrify -path ./optimized -format jpg -quality 85 -strip *.png
# High quality GIF with palette
ffmpeg -i input.mp4 -vf "fps=15,scale=640:-1:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" output.gif
# Gaussian blur
magick input.jpg -gaussian-blur 0x8 output.jpg
# Pass 1 (analysis)
ffmpeg -y -i input.mkv -c:v libx264 -b:v 2600k -pass 1 -an -f null /dev/null
# Pass 2 (encoding)
ffmpeg -i input.mkv -c:v libx264 -b:v 2600k -pass 2 -c:a aac output.mp4
# NVIDIA NVENC
ffmpeg -hwaccel cuda -i input.mp4 -c:v h264_nvenc -preset fast -crf 22 output.mp4
# Intel QuickSync
ffmpeg -hwaccel qsv -c:v h264_qsv -i input.mp4 -c:v h264_qsv output.mp4
# Resize, crop, border, adjust
magick input.jpg \
-resize 1000x1000^ \
-gravity center \
-crop 1000x1000+0+0 +repage \
-bordercolor black -border 5x5 \
-brightness-contrast 5x10 \
-quality 90 \
output.jpg
# Scale, denoise, watermark
ffmpeg -i video.mp4 -i logo.png \
-filter_complex "[0:v]scale=1280:720,hqdn3d[v];[v][1:v]overlay=10:10" \
-c:a copy output.mp4
# Create with delay
magick -delay 100 -loop 0 frame*.png animated.gif
# Optimize size
magick animated.gif -fuzz 5% -layers Optimize optimized.gif
# Detailed JSON output
ffprobe -v quiet -print_format json -show_format -show_streams input.mp4
# Get resolution
ffprobe -v error -select_streams v:0 \
-show_entries stream=width,height \
-of csv=s=x:p=0 input.mp4
# Basic info
identify image.jpg
# Detailed format
identify -verbose image.jpg
# Custom format
identify -format "%f: %wx%h %b\n" image.jpg
-c copy-strip-interlace PlaneDetailed guides in references/:
-c:v - Video codec (libx264, libx265, libvpx-vp9)-crf - Quality (0-51, lower=better, 23=default)-preset - Speed/compression (ultrafast to veryslow)-b:v - Video bitrate (e.g., 2M, 2500k)-vf - Video filters-c:a - Audio codec (aac, mp3, opus)-b:a - Audio bitrate (e.g., 128k, 192k)-ar - Sample rate (44100, 48000)800x600 - Fit within (maintains aspect)800x600! - Force exact size800x600^ - Fill (may crop)800x - Width onlyx600 - Height only50% - Scale percentageFFmpeg "Unknown encoder"
# Check available encoders
ffmpeg -encoders | grep h264
# Install codec libraries
sudo apt-get install libx264-dev libx265-dev
ImageMagick "not authorized"
# Edit policy file
sudo nano /etc/ImageMagick-7/policy.xml
# Change <policy domain="coder" rights="none" pattern="PDF" />
# to <policy domain="coder" rights="read|write" pattern="PDF" />
Memory errors
# Limit memory usage
ffmpeg -threads 4 input.mp4 output.mp4
magick -limit memory 2GB -limit map 4GB input.jpg output.jpg