Infinitetalk Fast Multi | AI Digital Human API

InfiniteTalkFast multi

What is InfiniteTalk?

InfiniteTalk creates videos with accurate lip sync while matching head, face, and body movements to the audio. It maintains identity across unlimited-length videos and also allows image-to-video creation, transforming static photos into lively speaking or singing videos.

Why it looks great

Accurate lip synchronization: aligns lip motion precisely with audio, preserving natural rhythm and pronunciation.
Full-body coherence: captures head movements, facial expressions, and posture changes beyond the lips.
Identity preservation: maintains consistent facial identity and visual style across frames.
Image-to-video capability: turns static photos into realistic speaking or singing videos.
Instruction following: accepts text prompts to control scene, pose, or behavior while syncing to audio.

How to Use

Upload the left and right audio files.
Upload your image (The image should clearly show two people).
Select the speaking order (left to right, right to left, or meanwhile).
Write the prompt if needed.
Submit the job and download the results once they're ready.

Note

Max clip length per job: up to 10 minutes
Processing speed: approximately 10–30 seconds of wall time per 1 second of video (varies by resolution and queue load)

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Reference

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Infinitetalk Fast Multi API — Quick start

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/wavespeed-ai/infinitetalk-fast/multi with your input as JSON. The endpoint returns a prediction id; poll the prediction endpoint until status flips to completed, then read the output URL from data.outputs[0]. Examples for Infinitetalk Fast Multi below.

HTTP example

# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/wavespeed-ai/infinitetalk-fast/multi" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY" \
  -d '{
    "image": "https://example.com/your-input.jpg",
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "order": "meanwhile",
    "seed": -1
}'

# Response includes a prediction id. Poll for the result:
curl -X GET "https://api.wavespeed.ai/api/v3/predictions/{request_id}/result" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY"

# When status is "completed", read the output from data.outputs[0].

Node.js example

// npm install wavespeed
const WaveSpeed = require('wavespeed');

const client = new WaveSpeed(); // reads WAVESPEED_API_KEY from env

const result = await client.run("wavespeed-ai/infinitetalk-fast/multi", {
        "image": "https://example.com/your-input.jpg",
        "prompt": "A cinematic shot of a city at sunset, soft golden light",
        "order": "meanwhile",
        "seed": -1
});

console.log(result.outputs[0]); // → URL of the generated output

Python example

# pip install wavespeed
import wavespeed

output = wavespeed.run(
    "wavespeed-ai/infinitetalk-fast/multi",
    {
    "image": "https://example.com/your-input.jpg",
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "order": "meanwhile",
    "seed": -1
}
)

print(output["outputs"][0])  # → URL of the generated output

Infinitetalk Fast Multi API — Frequently asked questions

What is the Infinitetalk Fast Multi API?

Infinitetalk Fast Multi is a WaveSpeedAI model for talking-avatar generation, exposed as a REST API on WaveSpeedAI. InfiniteTalk fast multi converts a single image and two audio inputs into multi-character talking or singing videos. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing. You can call it programmatically or try it from the playground above.

How do I call the Infinitetalk Fast Multi API?

POST your input parameters to the model's REST endpoint (shown in the API tab of this playground) with your WaveSpeedAI API key in the Authorization header. Submission returns a prediction ID; poll the prediction endpoint until status flips to "completed", then read the output URL from the result. The playground generates a ready-to-paste code sample in Python, JavaScript, or cURL for whatever inputs you've set. Full request/response shape is documented at https://wavespeed.ai/docs/docs-api/wavespeed-ai/infinitetalk-fast-multi.

How much does Infinitetalk Fast Multi cost per run?

Infinitetalk Fast Multi starts at $0.075 per run. That figure is the base price — the final charge scales with the parameters you set in the form (output size, length, count, references, or whatever knobs this model exposes), so a higher-quality or larger output costs more than a minimal one. The exact cost for your current input is shown live next to the Generate button before you submit, and the actual per-call charge is recorded on the prediction afterwards.

What inputs does Infinitetalk Fast Multi accept?

Key inputs: `prompt`, `image`, `seed`, `left_audio`, `order`, `right_audio`. The full JSON schema (types, defaults, allowed values) is rendered above the Generate button and mirrored in the API reference at https://wavespeed.ai/docs/docs-api/wavespeed-ai/infinitetalk-fast-multi.

How long does Infinitetalk Fast Multi take to generate?

Average end-to-end generation time on WaveSpeedAI is around 367 seconds per request — measured across recent runs. Queue time scales with global demand; live status is visible in the prediction record.

Can I use Infinitetalk Fast Multi outputs commercially?

Commercial usage rights depend on the model's license, set by its provider (WaveSpeedAI). The license summary appears on the model card above; see WaveSpeedAI's Terms of Service for platform-level conditions.

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