Video

FLUX.3 Draft Extend

Credit-based pricing. Supports reference video, audio generation.

Try FLUX.3 Draft Extend →Compare models

Output

video

Aspect ratio

auto, 21:9, 2:1, 16:9, 4:3, 1:1, 3:4, 9:16

Duration

5s, 6s, 7s, 8s, 9s, 10s, 11s, 12s, 13s, 14s, 15s, 16s, 17s, 18s, 19s, 20s

Inputs

Reference video (required)

Generates audio

Example prompt

Continue naturally from the source clip, keep the current camera momentum, subject identity, dialogue, and room tone

Try this prompt →

LLM-ready

API & LLM schema

Exact request contract for this model. Agents can fetch it from /api/v1/models?id=blackforestlabs/flux-3/extend-video/draft.

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	Required	Optional model input.
`video_url`	string	Required	Format: uri
`generate_audio`	boolean	Optional	Generate synchronized dialogue, ambience, and sound effects with the video. · Default: true
`aspect_ratio`	string	Optional	Allowed: auto, 21:9, 2:1, 16:9, 4:3, 1:1, 3:4, 9:16
`safety_tolerance`	number	Optional	Provider safety level. 0 is strictest; ArtEmotion keeps the provider default of 2. · Allowed: 0, 1, 2, 3, 4 · Default: 2
`duration`	number	Optional	Allowed: 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20

Minimal request example

{
  "model_id": "blackforestlabs/flux-3/extend-video/draft",
  "prompt": "Continue naturally from the source clip, keep the current camera momentum, subject identity, dialogue, and room tone",
  "video_url": "https://example.com/video"
}

Raw JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.artemotion.ai/api/v1/models?id=blackforestlabs%2Fflux-3%2Fextend-video%2Fdraft",
  "title": "FLUX.3 Draft Extend generation request",
  "description": "Request body accepted by POST /api/v1/generate for blackforestlabs/flux-3/extend-video/draft.",
  "type": "object",
  "properties": {
    "model_id": {
      "type": "string",
      "const": "blackforestlabs/flux-3/extend-video/draft",
      "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"
    },
    "video_url": {
      "type": "string",
      "format": "uri"
    },
    "generate_audio": {
      "title": "Generate audio",
      "description": "Generate synchronized dialogue, ambience, and sound effects with the video.",
      "default": true,
      "type": "boolean"
    },
    "aspect_ratio": {
      "type": "string",
      "enum": [
        "auto",
        "21:9",
        "2:1",
        "16:9",
        "4:3",
        "1:1",
        "3:4",
        "9:16"
      ]
    },
    "safety_tolerance": {
      "title": "Safety tolerance",
      "description": "Provider safety level. 0 is strictest; ArtEmotion keeps the provider default of 2.",
      "default": 2,
      "type": "number",
      "enum": [
        0,
        1,
        2,
        3,
        4
      ]
    },
    "duration": {
      "type": "number",
      "enum": [
        5,
        6,
        7,
        8,
        9,
        10,
        11,
        12,
        13,
        14,
        15,
        16,
        17,
        18,
        19,
        20
      ]
    }
  },
  "required": [
    "model_id",
    "prompt",
    "video_url"
  ],
  "additionalProperties": false
}

Browse schemas for every ArtEmotion model →

FAQ

How much does FLUX.3 Draft Extend 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 FLUX.3 Draft Extend fails?

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

Can I call FLUX.3 Draft Extend from the API?

Yes. Use POST /api/v1/generate with model_id: "blackforestlabs/flux-3/extend-video/draft". 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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No commitment. New accounts get 50 free credits on signup. See pricing.