All 94 skillsDesign and media9 of 10

stryx:media-processing

When existing video, audio or image files must be converted, shrunk, cut or joined.

/stryx:media-processing

Inside its piece: 14 specks, one for each file on its shelf. Its nine group-mates glow on the open book behind it. The light splits toward yellow, the band of Design and media.

In numbers

counted 2026-10-12 in the installed set
  • 10reference files
  • 2helper scripts
  • 14files in the skill
  • 155KB on disk
  • 9chapters

Use it when

in the skill’s own words

When converting, compressing or editing existing video, audio or image files

  • FFmpeg, ffprobe or ImageMagick commands
    • "convert to mp4/webm/mp3/webp/avif"
    • "resize, crop or trim this image"
    • "image too large"
    • "optimise images for the web"
    • thumbnail-size copies
    • a poster frame from a video
    • a GIF from a clip
    • cutting
    • joining
    • rotating or watermarking video
    • extracting or replacing audio
    • loudness normalizing
    • ducking music under a voiceover
    • HLS/DASH or RTMP streaming
    • NVENC/QSV/AMF GPU encoding
    • batch-processing a folder
    • responsive image sizes
    • trimming whitespace off a logo
    • RGBA to JPG
    • errors like "width not divisible by 2"
    • "Unknown encoder"
    • "Unrecognized option 'vsync'"
    • "Invalid Parameter" from convert on Windows
    • "not authorized" or video that plays in VLC but not a browser

Not for

another skill does it

On its shelf

14 files, 155 KB
  • references/10
  • scripts/2
  • SKILL.md1
  • evals/1

Inside the book

9 chapters, by title only
  1. When invoked with arguments
  2. The procedure (every job)
  3. Tool choice
  4. Copy, remux or re-encode
  5. Quick reference: video
  6. Quick reference: audio
  7. Quick reference: images
  8. Windows and shell rules
  9. Security

Works with

the skills it names most

Claude loads it by itself when the moment comes; by hand, type the line at the top. It comes with the whole set: Installs all 94 skills, 32 agents and the brain program as one set. The skill’s own text is private source and is not shown here.