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MODEL ID sync:react-1@1
api-only

react-1

sync.
by sync.

react-1 is a video performance editing model designed for post-production direction without reshoots. It modifies acting and emotional delivery within existing footage while preserving identity and visual continuity, enabling directors to reshape performances using audio or written guidance.

react-1

API Options

Platform-level options for task execution and delivery.

taskType

string required value: videoInference

Identifier for the type of task being performed

taskUUID

string required UUID v4

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

outputType

string default: URL

Video output type.

Allowed values 1 value

outputFormat

string default: 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 values 3 values

outputQuality

integer min: 20 max: 99 default: 95

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

webhookURL

string URI

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 more 1 resource

deliveryMethod

string default: async

Determines how the API delivers task results.

Allowed values 1 value
Returns an immediate acknowledgment with the task UUID. Poll for results using getResponse. Required for long-running tasks like video generation.
Learn more 1 resource

uploadEndpoint

string URI

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.

safety

object

Content safety checking configuration for video generation.

Properties 2 properties
safety » checkContent

checkContent

boolean default: false

Enable or disable content safety checking. When enabled, defaults to fast mode.

safety » mode

mode

string default: none

Safety checking mode for video generation.

Allowed values 3 values
Disables checking.
Checks key frames.
Checks all frames.

ttl

integer min: 60

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

includeCost

boolean default: false

Include task cost in the response.

numberResults

integer min: 1 max: 4 default: 1

Number of results to generate. Each result uses a different seed, producing variations of the same parameters.

Inputs

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

video

string required

Video input (UUID or URL).

inputs » audio

audio

string

Audio input (UUID or URL).

Generation Parameters

Core parameters for controlling the generated content.

model

string required value: sync:react-1@1

Identifier of the model to use for generation.

Learn more 3 resources

Provider Settings

Parameters specific to this model provider. These must be nested inside the providerSettings.sync object.
providerSettings » sync » activeSpeakerDetection

activeSpeakerDetection

object

Speaker-targeting for multi-person clips.

Properties 1 property
providerSettings » sync » activeSpeakerDetection » autoDetect

autoDetect

boolean default: false

Automatically detect and target the active speaker.

providerSettings » sync » editRegion

editRegion

string default: face

Region of the subject to animate during re-animation.

Allowed values 3 values
Lip sync and emotional expressions in the face region.
Only lip movements for synchronization.
Full head movements with emotions and lip sync.
providerSettings » sync » emotionPrompt

emotionPrompt

string

Emotional tone for performance re-animation.

Allowed values 6 values
providerSettings » sync » occlusionDetectionEnabled

occlusionDetectionEnabled

boolean default: false

Enable occlusion handling for obstructed faces.

providerSettings » sync » syncMode

syncMode

string default: bounce

Synchronization strategy when audio and video durations don't match.

Allowed values 5 values
Audio bounces back and forth to fill video duration.
Audio repeats from the beginning when it ends.
Audio is cut when video ends.
Remaining video plays with silence after audio ends.
Audio is time-stretched or compressed to match video duration.
providerSettings » sync » temperature

temperature

float min: 0 max: 1 step: 0.01 default: 0.5

Expressiveness of lip sync and facial movements.

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