Video

LTX 2.5 Fast (Audio to Video)

Credit-based pricing. Supports image-to-video.

Try LTX 2.5 Fast (Audio to Video) →Compare models

Output

video

Aspect ratio

auto, 16:9, 9:16

Resolution

1080p (fixed)

Inputs

Reference audio (required)

Start image (optional)

Example prompt

A presenter speaks naturally in a bright modern studio, subtle gestures, steady medium shot

Try this prompt →

LLM-ready

API & LLM schema

Exact request contract for this model. Agents can fetch it from /api/v1/models?id=lightricks/ltx-2.5/audio-to-video/fast.

POST/api/v1/generate11 fields · 2 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.
`audio_url`	string	Required	Format: uri
`image_url`	string	Optional	Format: uri
`guidance_scale`	number	Optional	Prompt adherence. Provider defaults to 5 without an image and 9 with one. · Range: 1–50
`aspect_ratio`	string	Optional	Allowed: auto, 16:9, 9:16

Minimal request example

{
  "model_id": "lightricks/ltx-2.5/audio-to-video/fast",
  "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=lightricks%2Fltx-2.5%2Faudio-to-video%2Ffast",
  "title": "LTX 2.5 Fast (Audio to Video) generation request",
  "description": "Request body accepted by POST /api/v1/generate for lightricks/ltx-2.5/audio-to-video/fast.",
  "type": "object",
  "properties": {
    "model_id": {
      "type": "string",
      "const": "lightricks/ltx-2.5/audio-to-video/fast",
      "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"
    },
    "audio_url": {
      "type": "string",
      "format": "uri"
    },
    "image_url": {
      "type": "string",
      "format": "uri"
    },
    "guidance_scale": {
      "title": "Guidance Scale",
      "description": "Prompt adherence. Provider defaults to 5 without an image and 9 with one.",
      "type": "number",
      "minimum": 1,
      "maximum": 50,
      "multipleOf": 0.5
    },
    "aspect_ratio": {
      "type": "string",
      "enum": [
        "auto",
        "16:9",
        "9:16"
      ]
    }
  },
  "required": [
    "model_id",
    "audio_url"
  ],
  "additionalProperties": false
}

Browse schemas for every ArtEmotion model →

FAQ

How much does LTX 2.5 Fast (Audio to Video) 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 LTX 2.5 Fast (Audio to Video) fails?

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

Can I call LTX 2.5 Fast (Audio to Video) from the API?

Yes. Use POST /api/v1/generate with model_id: "lightricks/ltx-2.5/audio-to-video/fast". 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.

Ready to generate with LTX 2.5 Fast (Audio to Video)?

Start now →

No commitment. New accounts get 50 free credits on signup. See pricing.