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meituan modelsimage generation api

meituan/longcat-multi-avatar/image-audio-to-video

Longcat Multi Avatar Image Audio To Video by meituan - advanced AI model for audio-to-video. Delivers high-quality results with fast inference, suitable for both creative and production workflows.

Input
The prompt to guide the video generation.

PNG, JPEG, WebP, or GIF · 20 MiB maximum

The URL of the image containing two speakers.
Resolution of the generated video (480p or 720p). Billing is per video-second (16 frames): 480p is 1 unit per second and 720p is 4 units per second. Allowed values: 480p, 720p.
10100
The number of inference steps to use. Range: 10 to 100.
The URL of the audio file for person 2 (right side).
110
Number of video segments to generate. Each segment adds ~5 seconds of video. First segment is ~5.8s, additional segments are 5s each. Range: 1 to 10.
The URL of the audio file for person 1 (left side).
How to combine the two audio tracks. 'para' (parallel) plays both simultaneously, 'add' (sequential) plays person 1 first then person 2. Allowed values: para, add.
Bounding box for person 2. If not provided, defaults to right half of image.
110
The audio guidance scale. Higher values may lead to exaggerated mouth movements. Range: 1 to 10.
Bounding box for person 1. If not provided, defaults to left half of image.
110
The text guidance scale for classifier-free guidance. Range: 1 to 10.
The seed for the random number generator.
Idle

Example output — click Run to generate your own

API README

Longcat Multi Avatar

Longcat Multi Avatar is a LongCat route built for image-and-audio-driven avatar animation. It turns a portrait reference and speech audio into a synchronized talking-character video, giving creators a focused endpoint instead of forcing one generic workflow across materially different production tasks. The route belongs to a family known for efficient generation, stable visual continuity, and practical media workflows, so it is best evaluated as a creative system for intentional shots and assets rather than as a one-click novelty generator.

Use this endpoint when the input contract and deliverable match that job exactly. Its documented controls include seed (The seed for the random number generator); audio_type choices (para, add); resolution choices (480p, 720p); bbox_person1 (Bounding box for person 1. If not provided, defaults to left half of image). Together, these controls help teams plan predictable iterations, compare outputs under stable settings, and connect generation to high-volume creative iteration and avatar or video production without hiding the operational choices that shape the result.

Highlights

  • Purpose-built Image-and-audio-driven avatar animation. The route accepts a portrait reference and speech audio and produces a synchronized talking-character video; its interface is scoped to that transformation, keeping source assets and creative intent explicit.
  • Creative direction. Prompts can describe subject behavior, composition, camera intent, lighting, material, atmosphere, and temporal progression so the result is driven by a shot plan rather than isolated keywords.
  • Route-specific control. The request exposes seed (The seed for the random number generator); audio_type choices (para, add); resolution choices (480p, 720p); bbox_person1 (Bounding box for person 1. If not provided, defaults to left half of image), allowing the same concept to be tested systematically while preserving a repeatable production setup.
  • Pipeline-ready output. The generated media asset is returned through the documented asynchronous output contract, which suits review queues, batch iteration, and downstream automation. Editors can review pacing, continuity, lens language, choreography, transitions, temporal artifacts, soundtrack alignment, color response, delivery framing, and cut compatibility before approval.

Pricing

ConfigurationPrice
Billing ruleparams.resolution == "480p" ? params.duration * 0.15 : params.duration * 0.30
resolution=480pCalculated by billing rule
resolution=720pCalculated by billing rule

When to Use

ScenarioWhy this model fits
Create the exact route outputChoose it when you need image-and-audio-driven avatar animation and already have a portrait reference and speech audio.
Develop controlled variationsKeep the main brief fixed while changing one documented setting at a time to compare motion, framing, quality, or asset behavior.
Build repeatable batchesUse a consistent request shape for catalog, campaign, storyboard, game-asset, or social-content production.
Preserve source intentPrefer this route when the supplied reference material must remain the foundation of a synchronized talking-character video.
Connect a media pipelineUse asynchronous results in an automated review, approval, post-production, or asset-management workflow.

Prompt Guide

Start with the desired result, then describe the source relationship, subject action, composition or camera behavior, lighting, style, and timing. For image-and-audio-driven avatar animation, state what must remain stable as clearly as what should change. Use only fields exposed by the schema; the example below is structurally valid for this route.

{
  "prompt": "Static camera, In a professional recording studio, two people stand facing each other, both wearing large headphones. They are speaking clearly into a large condenser microphone suspended between them. They looked at each other affectionately and occasionally shook their heads according to the rhythm. The soundproofed walls and visible recording equipment create an atmosphere focused on capturing high-quality audio as they interact and communicate.",
  "image": "https://example.com/image.jpg",
  "seed": 1,
  "audio_type": "para",
  "resolution": "480p"
}

Technical Specs

SpecificationValue
Model IDmeituan/longcat-multi-avatar/image-audio-to-video
WorkflowImage-and-audio-driven avatar animation
Required inputsprompt, image
seedinteger
imagestring
promptstring
audio_typestring; options: para, add
resolutionstring; options: 480p, 720p
bbox_person1string
bbox_person2string
num_segmentsinteger; minimum: 1; maximum: 10
audio_url_person1string
audio_url_person2string

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