short-form-ffmpeg-cookbook SKILL.md skillA
short-form-ffmpeg-cookbook from varghq/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add varghq/skills/short-form-ffmpeg-cookbook@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- varghq/skills
- Path
short-form-ffmpeg-cookbook/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Oct 28, 2026
- Size
- 5,471 bytes
- Repository stars
- 21
- License
- MIT
Short-form FFmpeg cookbook: copyable commands for Reels. Turns raw footage into a 1080×1920 9:16 MP4 for Reels, TikTok and Shorts with burned-in captions (SRT or ASS), trims and joins clips, and lays music under the voice with ducking. Every command was run on test media. Free and local; works in Claude Code, Codex and Grok, or on the varg ffmpeg tool (credits) when the agent has no shell. Use when the user wants to crop to vertical, burn subtitles, cut or join clips, or add background music…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Short-form FFmpeg cookbook: copyable commands for Reels Input: a video (any size), optionally an SRT file and a music track. Output: a 1080×1920 9:16 MP4 ready for Reels, TikTok and Shorts. Probe first, run one recipe at a time, check the result with ffprobe and a frame grab before the next step. ```bash ffprobe -v error -show_entries stream=codec_type,codec_name,width,height,r_frame_rate -show_entries format=duration -of compact=p=0 input.mp4 ``` ## 1. Crop to 9:16 vertical ```bash # center crop, full height ffmpeg -i input.mp4 -vf "crop=ih*9/16:ih,scale=1080:1920,setsar=1" -c:v libx264 -crf 20 -c:a copy vertical.mp4 # subject off-center: add the x offset in px ffmpeg -i input.mp4 -vf "crop=ih*9/16:ih:200:0,scale=1080:1920,setsar=1" -c:v libx264 -crf 20 -c:a copy vertical.mp4 # keep the whole frame over a blurred copy ffmpeg -i input.mp4 -filter_complex "[0:v]scale=1080:1920:force_original_aspect_ratio=increase,crop=1080:1920,boxblur=20:2[bg];[0:v]scale=1080:-2[fg];[bg][fg]overlay=(W-w)/2:(H-h)/2,setsar=1" -c:v libx264 -crf 20 -c:a copy vertical-blur.mp4 ``` ## 2. Burn in captions ```bash …
Read the whole file at its exact version.
How to install
mdr add varghq/skills/short-form-ffmpeg-cookbook@sha256:9fdf11c7e0b00263The line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_xbizuz3mkuhqxx7e)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 28, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5471 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
varghq/skills · 21 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xbizuz3mkuhqxx7e GET https://markdownregistry.com/api/v1/resolve?ref=varghq/skills/short-form-ffmpeg-cookbook GET https://markdownregistry.com/api/v1/blob/9fdf11c7e0b002634f4400172550c321a454eca7f56546e2348c0b34b5164a5e
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.