FastRTC

The Real-Time Communication Library for Python.

Turn any python function into a real-time audio and video stream over WebRTC or WebSockets.

Installation

pip install fastrtc

to use built-in pause detection (see ReplyOnPause), and text to speech (see Text To Speech), install the vad and tts extras:

pip install fastrtc[vad, tts]

Key Features

• 🗣️ Automatic Voice Detection and Turn Taking built-in, only worry about the logic for responding to the user.
• 💻 Automatic UI - Use the .ui.launch() method to launch the webRTC-enabled built-in Gradio UI.
• 🔌 Automatic WebRTC Support - Use the .mount(app) method to mount the stream on a FastAPI app and get a webRTC endpoint for your own frontend!
• ⚡️ Websocket Support - Use the .mount(app) method to mount the stream on a FastAPI app and get a websocket endpoint for your own frontend!
• 📞 Automatic Telephone Support - Use the fastphone() method of the stream to launch the application and get a free temporary phone number!
• 🤖 Completely customizable backend - A Stream can easily be mounted on a FastAPI app so you can easily extend it to fit your production application. See the Talk To Claude demo for an example on how to serve a custom JS frontend.

Docs

https://fastrtc.org