Video

LatentSync

Credit-based pricing. Supports reference video.

Try LatentSync →Compare models

Output

video

Inputs

Reference audio (required)
Reference video (required)

Example prompt

Upload a portrait video and audio — LatentSync is a fast open-source lipsync model trained on large-scale video data

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LLM-ready

API & LLM schema

Exact request contract for this model. Agents can fetch it from /api/v1/models?id=fal-ai/latentsync.

POST/api/v1/generate12 fields · 3 required

Field	Type	Requirement	Contract
`model_id`	constant	Required	ArtEmotion model identifier.
`extra`	object	Optional	Model-specific settings may also be nested here.
`max_credits`	number	Optional	Reject before submission if the estimated list price exceeds this cap. · Range: 1–…
`webhook_url`	string	Optional	Format: uri
`webhook_secret`	string	Optional	Optional model input.
`folder_id`	string	Optional	Optional model input.
`prompt`	string	Optional	Optional model input.
`loop_mode`	string	Optional	How to fill video when audio is longer than the source clip. None = no extension; Pingpong = bounce; Loop = repeat. · Allowed: , pingpong, loop · Default:
`guidance_scale`	number	Optional	Guidance scale for inference (1–2). Higher values follow the audio more strictly. · Default: 1 · Range: 1–2
`seed`	integer	Optional	Random seed. Leave blank for a random result.
`video_url`	string	Required	Format: uri
`audio_url`	string	Required	Format: uri

Minimal request example

{
  "model_id": "fal-ai/latentsync",
  "video_url": "https://example.com/video",
  "audio_url": "https://example.com/audio"
}

Raw JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.artemotion.ai/api/v1/models?id=fal-ai%2Flatentsync",
  "title": "LatentSync generation request",
  "description": "Request body accepted by POST /api/v1/generate for fal-ai/latentsync.",
  "type": "object",
  "properties": {
    "model_id": {
      "type": "string",
      "const": "fal-ai/latentsync",
      "description": "ArtEmotion model identifier."
    },
    "extra": {
      "type": "object",
      "additionalProperties": true,
      "description": "Model-specific settings may also be nested here."
    },
    "max_credits": {
      "type": "number",
      "minimum": 1,
      "description": "Reject before submission if the estimated list price exceeds this cap."
    },
    "webhook_url": {
      "type": "string",
      "format": "uri",
      "maxLength": 2048
    },
    "webhook_secret": {
      "type": "string",
      "maxLength": 512
    },
    "folder_id": {
      "type": "string"
    },
    "prompt": {
      "type": "string"
    },
    "loop_mode": {
      "title": "Loop Mode",
      "description": "How to fill video when audio is longer than the source clip. None = no extension; Pingpong = bounce; Loop = repeat.",
      "default": "",
      "type": "string",
      "enum": [
        "",
        "pingpong",
        "loop"
      ]
    },
    "guidance_scale": {
      "title": "Guidance Scale",
      "description": "Guidance scale for inference (1–2). Higher values follow the audio more strictly.",
      "default": 1,
      "type": "number",
      "minimum": 1,
      "maximum": 2,
      "multipleOf": 0.1
    },
    "seed": {
      "title": "Seed",
      "description": "Random seed. Leave blank for a random result.",
      "type": "integer"
    },
    "video_url": {
      "type": "string",
      "format": "uri"
    },
    "audio_url": {
      "type": "string",
      "format": "uri"
    }
  },
  "required": [
    "model_id",
    "video_url",
    "audio_url"
  ],
  "additionalProperties": false
}

Browse schemas for every ArtEmotion model →

FAQ

How much does LatentSync cost on ArtEmotion?

Credit-based pricing. You pay in ArtEmotion credits — every plan and top-up converts USD to credits at a fixed rate.

Do I get my credits back if LatentSync fails?

Yes — failed generations are never charged. The credits are released back to your balance automatically.

Can I call LatentSync from the API?

Yes. Use POST /api/v1/generate with model_id: "fal-ai/latentsync". See the API reference for the full schema.

Where are my generations stored?

Every output is saved to your personal Library. You can export or delete everything any time from Privacy & deletion.

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