Video

FLUX.3 Extend Video

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

Try FLUX.3 Extend Video →Compare models

Output

video

Aspect ratio

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

Resolution

720p, 1080p

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 the scene seamlessly beyond the final frame, preserve the camera momentum and subject identity, natural dialogue and matching ambience

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.

POST/api/v1/generate13 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
`resolution`	string	Optional	Allowed: 720p, 1080p
`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",
  "prompt": "Continue the scene seamlessly beyond the final frame, preserve the camera momentum and subject identity, natural dialogue and matching ambience",
  "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",
  "title": "FLUX.3 Extend Video generation request",
  "description": "Request body accepted by POST /api/v1/generate for blackforestlabs/flux-3/extend-video.",
  "type": "object",
  "properties": {
    "model_id": {
      "type": "string",
      "const": "blackforestlabs/flux-3/extend-video",
      "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"
      ]
    },
    "resolution": {
      "type": "string",
      "enum": [
        "720p",
        "1080p"
      ]
    },
    "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
}

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FAQ

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

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

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

Yes. Use POST /api/v1/generate with model_id: "blackforestlabs/flux-3/extend-video". 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.