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MODEL IDbfl:flux@video-upscale
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FLUX Video Upscale

Black Forest Labs
by Black Forest Labs

FLUX Video Upscale is a dedicated video enhancement model from Black Forest Labs for increasing source footage to 1080p, 2K, or 4K while preserving motion and the original audio track. It supports a source-faithful precise mode for faces, products, and brand-sensitive footage, plus a more creative enhancement mode that restores and invents finer detail for generated clips, scenery, textures, and crowd shots. The endpoint accepts clips up to 20 seconds long and can optionally use a prompt to steer the type of detail it enhances.

FLUX Video Upscale

API Options

Platform-level options for task execution and delivery.

taskType

stringrequiredvalue: upscale

Identifier for the type of task being performed

taskUUID

stringrequiredUUID v4

UUID v4 identifier for tracking tasks and matching async responses. Must be unique per task.

outputType

stringdefault: URL

Video output type.

Allowed values1 value

outputFormat

stringdefault: MP4

Specifies the file format of the generated output. The available values depend on the task type and the specific model's capabilities.

  • `MP4`: Widely supported video container (H.264), recommended for general use.
  • `WEBM`: Optimized for web delivery.
  • `MOV`: QuickTime format, common in professional workflows (Apple ecosystem).
Allowed values3 values

outputQuality

integermin: 20max: 99default: 95

Compression quality of the output. Higher values preserve quality but increase file size.

webhookURL

stringuri

Specifies a webhook URL where JSON responses will be sent via HTTP POST when generation tasks complete. For batch requests with multiple results, each completed item triggers a separate webhook call as it becomes available.

Learn more1 resource

deliveryMethod

stringdefault: async

Determines how the API delivers task results.

Allowed values1 value
Returns an immediate acknowledgment with the task UUID. Poll for results using getResponse. Required for long-running tasks like video generation.
Learn more1 resource

uploadEndpoint

stringuri

Specifies a URL where the generated content will be automatically uploaded using the HTTP PUT method. The raw binary data of the media file is sent directly as the request body. For secure uploads to cloud storage, use presigned URLs that include temporary authentication credentials.

Common use cases:

  • Cloud storage: Upload directly to S3 buckets, Google Cloud Storage, or Azure Blob Storage using presigned URLs.
  • CDN integration: Upload to content delivery networks for immediate distribution.
// S3 presigned URL for secure upload
https://your-bucket.s3.amazonaws.com/generated/content.mp4?X-Amz-Signature=abc123&X-Amz-Expires=3600

// Google Cloud Storage presigned URL
https://storage.googleapis.com/your-bucket/content.jpg?X-Goog-Signature=xyz789

// Custom storage endpoint
https://storage.example.com/uploads/generated-image.jpg

The content data will be sent as the request body to the specified URL when generation is complete.

ttl

integermin: 60

Time-to-live (TTL) in seconds for generated content. Only applies when outputType is URL.

includeCost

boolean

Include task cost in the response.

Inputs

Input resources for the task (images, audio, etc). These must be nested inside the inputs object.

inputs » video

video

stringrequired3 limits

Video input (UUID or URL).

Core Parameters

Primary parameters that define the task output.

model

stringrequiredvalue: bfl:flux@video-upscale

Identifier of the model to use for generation.

Learn more3 resources

positivePrompt

stringmin: 2max: 12000

Text prompt describing elements to include in the generated output. Steers which detail is enhanced.

Learn more1 resource

upscaleFactor

floatmin: 1.5max: 3step: 0.1default: 2

Factor by which to upscale the generated image. A value of 2 doubles width and height. Output frames are capped at about 14.4 megapixels, so a high-resolution source may be upscaled by less than the requested factor.

Settings

Technical parameters to fine-tune the inference process. These must be nested inside the settings object.

settings » creativity

creativity

integerdefault: 1

Level of fine detail the model restores or invents.

Allowed values2 values
Preserves the source and sharpens it.
Restores and invents detail more aggressively, without strictly preserving identity.
settings » safetyTolerance

safetyTolerance

integermin: 0max: 4default: 2

Tolerance level for content moderation. Lower values are stricter; higher values are more permissive.

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