Vidu S1 Live API Integration

Vidu S1 is a streaming, real-time, two-way interactive digital-human video service. You create a "live session", the media flows over an Aliyun RTC channel (not HTTP), and a persistent WebSocket carries control signaling (start / hangup). This skill encodes the end-to-end flow and — more importantly — the field-tested pitfalls, several of which contradict the public doc. When the doc and this skill disagree, this skill wins (it reflects vendor clarifications).

Before you write any code

Establish these with the user. They are prerequisites, not code: