Vidu S1 API Open Platform

Vidu S1
Real-Time Interactive
Digital Human Platform

The Vidu S1 streaming video generation model helps teams evaluate real-time AI avatars with voice control, bidirectional perception, and custom personas across human, anime, and mascot styles. Use it to plan enterprise pilots for interactive digital humans across RTC media and WebSocket control flows.

Real-time streaming videoVoice-driven interactionBidirectional perceptionText & multimodal control
Plan a Vidu S1 PilotReview Integration Flow

Evaluated by teams building across

Social PlatformsEcommerceEdTechGamingEnterprise

The Vidu S1 interaction model

From first frame to bidirectional conversation, all through a streaming video generation API pattern.

LIVERTC + WS

Real-Time Avatar Streaming

Plan Vidu S1 sessions around RTC media delivery, readiness checks, and responsive avatar playback.

HumanAnimeMascothuman · anime · mascot personas

Custom Persona Library

Choose from human, anime, or pet/mascot character types. Upload your own reference assets.

userVidu S1voice / text inputvisual perceptionend-to-end latency · WebRTC + WebSocket control

Bidirectional Perception

Design interactions where the avatar can respond to voice, text, and visual context while preserving user state.

Vidu S1 integration flow

The production pattern combines a secure server token, RTC media transport, and WebSocket session control.

1

Create a live session

A server-side call creates the Vidu S1 digital human session and returns the live id plus RTC entry details.

2

Join the RTC room

Your client joins the assigned audio or video channel, publishes user media, and subscribes to avatar output.

3

Open control signaling

A WebSocket control channel sends the ready signal and handles NOT_READY retries with backoff.

4

Maintain the call

Keep heartbeat behavior, session status, and forced hangup reasons visible to the client experience.

5

End deliberately

Send the hangup signal, leave the RTC channel, and close the control connection when the interaction ends.

6

Review usage

Fetch session status and billed usage after completion so product teams can model pilot economics.

Provider integrations

Connect Vidu S1 with HeyGen API and Replicate

Build the pilot around one server-side orchestration layer, then choose the right provider for realtime avatar sessions, avatar-video generation, or asynchronous model predictions.

Primary

Vidu S1 realtime core

Keep the RTC room, WebSocket control channel, avatar readiness, heartbeat, hangup, and usage review in one observable flow.

Avatar video

HeyGen API lane

Route approved presenter, video-agent, or avatar-video workflows through a server-side HeyGen API adapter when a pilot needs that provider.

Model jobs

Replicate model lane

Send async prediction jobs to Replicate for model experiments, creative preprocessing, or companion media tasks that do not need live RTC.

Server-held credentials

Keep Vidu S1, HeyGen API, and Replicate tokens off the browser and rotate them per environment.

Provider-safe routing

Normalize session ids, prediction ids, webhook states, retry reasons, and user-facing errors.

Policy and usage review

Track consent, avatar approval, provider spend, generated media retention, and final session status.

Quick Start
# Server-side setup only
1. Keep the Vidu S1 token on your backend
2. Create a live session with avatar image + persona
3. Store live.id for RTC and WebSocket control
4. Return only short-lived room details to the client

Where will Vidu S1 fit?

The same real-time digital human pattern can serve social, commerce, education, support, and entertainment teams.

AI Companion

Create a persistent digital companion with a custom persona, voice, and short-term memory loop.

Virtual Idol

Run interactive fan moments where a character can listen, react, and perform in real time.

Training

Turn onboarding, product walkthroughs, and coaching into live guided video sessions.

AI Service

Give support or concierge workflows a face, voice, and escalation-ready session model.

Live Commerce

Use a branded host or mascot to explain products, answer questions, and guide shoppers.

Game & Film

Prototype an NPC, guide, or companion character that responds across screens.

Education

Support language practice, lecture explainers, or role-play lessons with a live avatar.

Brand Mascot

Give campaigns a reusable animated persona for events, social, and customer education.

AI Companion

Create a persistent digital companion with a custom persona, voice, and short-term memory loop.

Virtual Idol

Run interactive fan moments where a character can listen, react, and perform in real time.

Training

Turn onboarding, product walkthroughs, and coaching into live guided video sessions.

AI Service

Give support or concierge workflows a face, voice, and escalation-ready session model.

Live Commerce

Use a branded host or mascot to explain products, answer questions, and guide shoppers.

Game & Film

Prototype an NPC, guide, or companion character that responds across screens.

Education

Support language practice, lecture explainers, or role-play lessons with a live avatar.

Brand Mascot

Give campaigns a reusable animated persona for events, social, and customer education.

Brand Mascot

Give campaigns a reusable animated persona for events, social, and customer education.

Education

Support language practice, lecture explainers, or role-play lessons with a live avatar.

Game & Film

Prototype an NPC, guide, or companion character that responds across screens.

Live Commerce

Use a branded host or mascot to explain products, answer questions, and guide shoppers.

AI Service

Give support or concierge workflows a face, voice, and escalation-ready session model.

Training

Turn onboarding, product walkthroughs, and coaching into live guided video sessions.

Virtual Idol

Run interactive fan moments where a character can listen, react, and perform in real time.

AI Companion

Create a persistent digital companion with a custom persona, voice, and short-term memory loop.

Brand Mascot

Give campaigns a reusable animated persona for events, social, and customer education.

Education

Support language practice, lecture explainers, or role-play lessons with a live avatar.

Game & Film

Prototype an NPC, guide, or companion character that responds across screens.

Live Commerce

Use a branded host or mascot to explain products, answer questions, and guide shoppers.

AI Service

Give support or concierge workflows a face, voice, and escalation-ready session model.

Training

Turn onboarding, product walkthroughs, and coaching into live guided video sessions.

Virtual Idol

Run interactive fan moments where a character can listen, react, and perform in real time.

AI Companion

Create a persistent digital companion with a custom persona, voice, and short-term memory loop.

Vidu S1 is being evaluated by teams across

Social Commerce
EdTech Platforms
Gaming Studios
Virtual Events
Customer Experience
Healthcare
Financial Services

3

interaction modes: voice, text, and video

3

avatar directions: human, anime, and mascot

RTC

media layer paired with WebSocket control

What teams should validate first

Treat a Vidu S1 rollout as a real-time media product, not a static chatbot launch.

Latency and readiness

Measure avatar preparation time, NOT_READY retries, media subscription timing, and perceived responsiveness in your target device mix.

Persona safety

Review the avatar image, persona prompt, voice choice, content boundaries, and escalation behavior before opening a public pilot.

Operational workflow

Connect session creation, RTC entry, WebSocket control, heartbeat, hangup, billing checks, and logs into one observable flow.

Usage and pilot planning

Exact Vidu S1 credit policy and account limits should be confirmed in the active console before launch.

Pilot planning

Usagebased

Model pilot cost around live duration and mode selection.

  • Billing starts when the avatar is live
  • Audio and video modes should be validated in your account
  • Round duration and balance rules before launch
  • Review session status and usage after hangup
Plan Pilot Usage
Recommended

Production review

Teamscope

For teams preparing a secure Vidu S1 deployment.

  • Server-side token handling
  • RTC SDK and WebSocket readiness logic
  • Avatar image and persona policy checks
  • Voice library or clone workflow review
  • Retry, heartbeat, and forced hangup handling
  • Monitoring for credits and session limits
Talk to an Avatar Engineer

Frequently asked questions

Practical notes for evaluating Vidu S1 before production integration

Ready to plan a Vidu S1 pilot?

Map your avatar persona, RTC client, WebSocket controls, and usage model before connecting a real backend.

Plan a PilotReview Integration