Offline speech-to-text & speaker diarization MCP server: transcribe audio on-device, no cloud
Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.
💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.
🎙️ Offline speech-to-text & speaker diarization for AI agents — Whisper ASR, live captioning, an MCP server, a CLI and Python bindings. Fully on-device, no cloud API.
🎙️ 离线语音识别 + 说话人分离,AI Agent 开箱即用 —— Whisper 实时转写 · 实时字幕 · MCP server · CLI · Python 绑定 · 100% 本地运行,音频不上云。

The honest pitch: ffvoice is an integration layer, not a new ASR engine. It embeds whisper.cpp as-is and makes no changes to its accuracy or inference speed. What ffvoice adds is a batteries-included, pre-wired pipeline — microphone capture → RNNoise denoising → VAD segmentation → Whisper ASR → speaker diarization → live captions / WAV / FLAC / subtitles — delivered as a single C++ SDK with Python bindings, a CLI, and an MCP server that lets AI agents (Claude and others) transcribe audio out of the box — all in one pip install or cmake build.
诚实定位: ffvoice 是一个集成层,而非新的 ASR 引擎。它内嵌 whisper.cpp,不修改其识别精度或推理速度。ffvoice 带来的是一条开箱即用、预连接的完整管道——麦克风采集 → RNNoise 降噪 → VAD 分段 → Whisper ASR → 说话人分离 → 实时字幕 / WAV / FLAC / 字幕输出——打包成 C++ SDK + Python 绑定 + CLI,外加一个 MCP server,让 AI agent(Claude 等)开箱即用地转写音频——一条 pip install 或 cmake 即可完成。
| Pain point | ffvoice approach |
|---|---|
| Privacy / 隐私合规 — audio must not leave the device (GDPR, HIPAA, enterprise policy) | 100% offline; audio never transmitted |
| Cloud cost / 云端费用 — commercial APIs charge per minute ($0.01–0.024/min at scale) | Zero per-minute cost; runs on your own hardware |
| Glue code / 胶水代码 — wiring PortAudio + RNNoise + VAD + whisper.cpp + FLAC yourself takes days | All wired together and tested; one SDK |
| Offline / 断网场景 — embedded systems, air-gapped environments, poor connectivity | Fully offline; no network dependency |
| Low latency / 低延迟 — cloud round-trips add 200–800ms per request | Local inference; < 100ms capture latency |
If raw ASR accuracy or throughput is your primary concern, evaluate whisper.cpp directly or consider specialized runtimes. ffvoice's value is the integrated pipeline, not the ASR engine itself.
ffvoice-engine 是一个轻量级、高性能的音频处理引擎,专注于实时音频采集、智能处理和语音识别。
vs 商业服务(Azure/Google Cloud Speech):
vs FFmpeg 命令行:
vs Python 方案(whisper-cli):
四个集成层路线图阶段全部交付,已发布到 PyPI(macOS / Linux / Windows,Python 3.10–3.14)。
| 能力 | 状态 |
|---|---|
| 音频采集 / WAV·FLAC 输出 / 音频增强(归一化·高通·RNNoise) | ✅ |
| 离线语音识别(Whisper ASR — 纯文本 / SRT / VTT / JSON,词级时间戳) | ✅ |
| 实时字幕流(LiveCaptioner — partial/final 字幕事件) | ✅ |
说话人分离(Diarizer — sherpa-onnx,可选 -DENABLE_DIARIZATION=ON) | ✅ |
| Agent 集成(CLI 硬化 + MCP server,5 个工具) | ✅ |
| 测试:311 C++ 单元测试 + 131 Python 测试,全部通过 | ✅ |
完整历史见 CHANGELOG.md。
macOS 安装:
Linux (Ubuntu/Debian) 安装:
Windows 安装:
标准编译:
Linux/macOS:
Windows:
启用 RNNoise 降噪 (推荐,自动下载):
Linux/macOS:
Windows:
启用 Whisper 语音识别 (推荐,自动下载):
Linux/macOS:
Windows:
启用所有可选功能 (Linux/macOS):
注意:
- Linux/macOS: 使用
./build/ffvoice- Windows: 使用
.\build\Release\ffvoice.exe
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