Openspline

Openspline: Video generation software that adds a live face and synchronized speech to voice AI agents from a portrait and audio.

OpenSpline turns a portrait and generated audio into synchronized video and speech for voice AI agents. It runs on your own GPU and provides Python and Node SDKs to stream audio and connect with providers like OpenAI, LiveKit, Gemini, and ElevenLabs. The software supports WebRTC and WebSocket playback through built-in viewers, React components, and web components. It is built for developers adding visual avatars to conversational agents. The backend manages GPU workers, stream buffering, idle video generation, and speech priority.

Openspline at a glance

Best for: Software engineer
Runs on: Python, Node, Web, API, self-hosted, open source
Pricing: Free
Released: October 2026
Category: AI video tool
Website: github.com/openspline/openspline

Key features

Stream audio to portrait
Python and Node SDKs
Built-in viewer and React component
OpenAI, LiveKit, Gemini, and ElevenLabs connectors
Self-hosted GPU service
WebRTC and WebSocket playback

Use it for

Create synchronized video avatars for voice AI agents
Stream generated audio to a static portrait image
Connect AI voice agents to live talking faces

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FableCut — Edit video via JSON and MCP or REST while an open browser UI hot-reloads live.

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