ffprobe-cli SKILL.md skillA
ffprobe-cli from vecnode/vncode is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add vecnode/vncode/ffprobe-cli@git:20260929.381b0dePins git:20260929.381b0de in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- vecnode/vncode
- Path
packages/dsh-media/skills/ffprobe-cli/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260929.381b0de, committed Sep 29, 2026
- First version recorded
- Sep 26, 2026
- Size
- 11,581 bytes
- Repository stars
- 10
- License
- AGPL-3.0
Read a media file's real structure with ffprobe through media_run - the JSON invocation and how to read it, what every family of field means, how to count frames, sample without decoding everything, detect HDR and interlacing, and diagnose a missing duration, a stream with no frames or a container that lies. Covers when media_probe's own report is already enough.
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
# Reading media with ffprobe
ffprobe answers questions about a file's **header and its packets** without
decoding it. That makes it cheap and safe on a damaged or huge file, and it makes
its answers statements about what the container *claims*: it will report a stream
with zero frames, a duration of `N/A`, and a frame rate the file does not actually
deliver, because those are the facts it has.
Run it through `media_run` with `binary: "ffprobe"`. `args` is an **array**, and
ffprobe gets **none** of the flags ffmpeg gets - no `-n`, no `-nostdin`, no
`-hide_banner`. The wrapper still applies the timeout (120 s default, 600 s
maximum), the output cap, and the `cwd` (the conversation workspace unless you
name one).
## The invocation worth memorising
```
{ "binary": "ffprobe",
"args": ["-v","error","-print_format","json","-show_format","-show_streams","-show_chapters","-show_error","clip.mp4"] }
```
`-v error` keeps the answer JSON rather than JSON behind a warning;
`-print_format json` (`-of json` is the same option) gives one parseable object
instead of one `key=value` line per field; and each `-show_*` adds a section -
…Read the whole file at its exact version.
How to install
mdr add vecnode/vncode/ffprobe-cli@sha256:021eaf8eb991af6fThe line at the top of this page pins the label git:20260929.381b0de, 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_6xz6nb75ven3deg7)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Sep 26, 2026 and Sep 29, 2026, about one every 2 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260929.381b0de latest | 2026-09-29 | 381b0de | 11,581 B | A | view · diff |
| git:20260926.01cd752 | 2026-09-26 | 01cd752 | 10,794 B | A | view |
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 (11581 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
vecnode/vncode · 10 stars · license AGPL-3.0 · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6xz6nb75ven3deg7 GET https://markdownregistry.com/api/v1/resolve?ref=vecnode/vncode/ffprobe-cli GET https://markdownregistry.com/api/v1/blob/021eaf8eb991af6fcfb72a36545694ab13850dd8e73f3839e841fe77eeeeff9e
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.