caption-video SKILL.md skillA
caption-video from novoads/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add novoads/agent-skills/caption-video@git:20260911.9e39357Pins git:20260911.9e39357 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- novoads/agent-skills
- Path
shared/skills/caption-video/SKILL.md- Versions recorded
- 6
- Latest version
- git:20260911.9e39357, committed Sep 11, 2026
- First version recorded
- Aug 13, 2026
- Size
- 8,559 bytes
- Repository stars
- 28
- License
- MIT
Burn timed, styled captions into a finished video on the local machine, without re-rendering the source. This is the manual fallback to the API's captioning endpoint, POST /v1/captions, which stays the default path: come here when the style the user wants is outside the API's presets, when the wording has to be hand-corrected before it is burned into the pixels, or when the source was rendered with audio disabled and the API refuses it. Transcribes the audio with Whisper, groups words into…
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
# Caption a finished video Takes a finished MP4 with speech and returns the same video with timed captions burned in. Nothing is regenerated: the source pixels and the source audio pass through untouched, and the captions are composited on top. **This skill makes no API calls.** It is ffmpeg + Whisper + HyperFrames on a local file, so it costs no credits and needs no API key. ## Check the API path first `POST /v1/captions` is the default, and it is one call against a finished asset with a set of preset styles and no local toolchain at all. Read the `novoads-api` skill's SKILL.md (*Burned-in captions*) for the call, and [prompting/guide.md](prompting/guide.md) here for the full side by side. **Offer both paths rather than picking silently**, because the API costs credits and this skill costs a first-time setup. > **REST key required. A Novoads MCP connector is not a substitute.** If > `NOVOADS_API_KEY` is missing or still the placeholder, stop before any > generation work and tell the user: "Before continuing, create an API key at > <https://novoads.ai/dashboard/settings?tab=api> and paste it into `.env`." …
Read the whole file at its exact version.
How to install
mdr add novoads/agent-skills/caption-video@sha256:6b445e3f38e92b28The line at the top of this page pins the label git:20260911.9e39357, 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_ckevetsru2tllwr6)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between Aug 13, 2026 and Sep 11, 2026, about one every 6 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260911.9e39357 latest | 2026-09-11 | 9e39357 | 8,559 B | A | view · diff |
| git:20260814.0cfabea | 2026-08-14 | 0cfabea | 8,559 B | A | view · diff |
| git:20260814.62e1e32 | 2026-08-14 | 62e1e32 | 8,562 B | A | view · diff |
| git:20260813.5c277a4 | 2026-08-13 | 5c277a4 | 8,562 B | A | view · diff |
| git:20260813.9f29036 | 2026-08-13 | 9f29036 | 8,562 B | A | view · diff |
| git:20260813.5616c8d | 2026-08-13 | 5616c8d | 8,227 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 (8559 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
novoads/agent-skills · 28 stars · license MIT · pushed 2026-10-17 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ckevetsru2tllwr6 GET https://markdownregistry.com/api/v1/resolve?ref=novoads/agent-skills/caption-video GET https://markdownregistry.com/api/v1/blob/6b445e3f38e92b28476f719e07ecadd2105f9d9f58051161cd371b83442933e6
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.