whisper-preprocess

whisper-preprocess is a skill for Claude Code from j0ruge/skills_commands_manager. It costs 89 tokens per session (4,553 once invoked), scanned A, original, no licence file.

An offline audio and video preparation and transcription workflow using ffmpeg and OpenAI Whisper. It extracts audio, removes silence, improves voices, splits recordings into sections, and converts speech to text.

In plain words
What is it for?
Use it to transcribe lectures, meetings, podcasts, interviews, and files such as MKV, MP4, WAV, and M4A.
Why use it?
It prepares difficult recordings before transcription without sending the media through an online processing service.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the whisper-preprocess plugin — 1 skill shipped together

Good fit Use it to transcribe lectures, meetings, podcasts, interviews, and files such as MKV, MP4, WAV, and M4A.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/j0ruge/skills_commands_manager/whisper-preprocess
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add j0ruge/skills_commands_manager --skill whisper-preprocess
Clone the repo
git clone --depth 1 https://github.com/j0ruge/skills_commands_manager

Made for: Claude Code.

Or install whisper-preprocess, the plugin that ships this one along with the rest of its 1 skill.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for whisper-preprocess

README.md
[![agentmods](https://agentmods.dev/badge/skills/j0ruge/skills_commands_manager/whisper-preprocess/github.svg)](https://agentmods.dev/skills/j0ruge/skills_commands_manager/whisper-preprocess)
Your own site
<a href="https://agentmods.dev/skills/j0ruge/skills_commands_manager/whisper-preprocess"><img src="https://agentmods.dev/badge/skills/j0ruge/skills_commands_manager/whisper-preprocess/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for whisper-preprocess

Your own site · 80×15
<a href="https://agentmods.dev/skills/j0ruge/skills_commands_manager/whisper-preprocess"><img src="https://agentmods.dev/badge/skills/j0ruge/skills_commands_manager/whisper-preprocess.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 89 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,553 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00089 $0.04553
Opus 5 $0.00044 $0.02277
Sonnet 5 $0.00018 $0.00911
Haiku 4.5 $0.00009 $0.00455

Measured 6d ago against content hash 2274e0bd5e42, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

whisper-preprocess scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/merge_passes.py, scripts/whisper_preprocess.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

On Windows the default console encoding is cp1252. When `whisper` CLI prints transcription progress containing accented or CJK characters it crashes with `UnicodeEncodeError`, and the Python `subprocess.run` reader threa
plugins/whisper-preprocess/skills/whisper-preprocess/SKILL.md · 286 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 6d ago Changed · -1 lines 2274e0bd5e42
  2. 10d ago First seen · 287 lines · 89 tokens per session scan A bd549e454f5f

Subscribe to this mod's changes

whisper-preprocess is a skill published in the GitHub repository j0ruge/skills_commands_manager (10 stars, last pushed today), with no licence file. It adds 89 tokens to every session and 4,553 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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