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Lightricks modelsvideo generation api

lightricks/ltx-2-19b/distilled/extend-video

Ltx 2 19b Distilled Extend Video by Lightricks - AI-powered video editing and transformation. Apply style transfer, motion control, lip-sync, and visual effects to existing videos with natural language instructions.

Input
The prompt to generate the video from.

PNG, JPEG, WebP, or GIF · 20 MiB maximum

The URL of the image to use as the end of the extended video.
The URL of the video to extend.
Whether to generate audio for the video.
The seed for the random number generator.
01
Audio conditioning strength. Lower values represent more freedom given to the model to change the audio content. Range: 0 to 1.
01
Video conditioning strength. Lower values represent more freedom given to the model to change the video content. Range: 0 to 1.
01
The strength of the end image to use for the video generation. Range: 0 to 1.
Direction to extend the video. 'forward' extends from the end of the video, 'backward' extends from the beginning. Allowed values: forward, backward.
Idle

Example output — click Run to generate your own

API README

LTX-2 19B Distilled

LTX-2 19B Distilled is a video continuation endpoint in the LTX 2 19B family. It is built for creators who need to turn a concrete creative brief into a controlled visual sequence: the request establishes the source material, the intended subject behavior, the camera language, and the atmosphere of the finished shot. The distilled route keeps that workflow explicit instead of hiding its input assumptions behind a generic video-generation label.

In practice, this route accepts video, end image as creative context and exposes generate audio, video strength for delivery planning. That makes it suitable for shot-based pipelines where teams must preserve a source, direct a transformation, or control the final format without losing sight of the model's central task. Write prompts as a compact shot plan—subject, action, setting, camera, light, and timing—then use the structured fields for constraints that should remain deterministic across iterations.

Highlights

  • Continuation beyond the cut. The video input supplies the existing timeline and the prompt directs what happens after its current endpoint.
  • Controlled transition target. end_image can anchor the final composition of the newly extended segment.
  • Continuity-versus-change balance. video_strength tunes how strongly the extension follows the incoming visuals.
  • Distilled-route audio carried into the extension. audio_strength and generate_audio coordinate soundtrack continuity where documented. This capability is exposed by the named distilled route and its exact request fields. For lightricks/ltx-2-19b/distilled/extend-video, this task-specific control is documented alongside the route’s own required inputs.

Pricing

The request price is calculated with params.width * params.height * params.frames * 0.0008.

ConfigurationPrice
Formula-priced requestparams.width * params.height * params.frames * 0.0008

The model card records a base price of $0.000800; the formula above determines usage-priced requests.

When to Use

ScenarioRecommendation
Choose this routeUse it when the deliverable specifically calls for video continuation, rather than a neighboring generation mode.
Prepare the sourceProvide video in the format described by the request schema.
Direct the shotDescribe the subject, action, environment, camera movement, lighting, and temporal progression in that order.
Control continuityUse endpoint frames, reference media, strength, or audio controls when those fields are available instead of burying hard constraints in prose.
Plan deliverySet duration, frame count, resolution, and aspect ratio explicitly when the schema exposes them, then compare iterations with a stable seed where supported.

Prompt Guide

For video continuation, describe one coherent shot rather than a list of visual keywords. Put the main subject and action first, follow with location and staging, then add camera movement, lens or framing, lighting, mood, and any timed change. Keep URLs and hard delivery choices in their dedicated fields.

{
  "prompt": "Continue the scene naturally, maintaining the same style and motion.",
  "generate_audio": true,
  "video": "https://static.sandbase.ai/examples/lightricks/ltx-2-19b/distilled/extend-video/input_video_0.mp4",
  "end_image": "https://example.com/reference.jpg"
}

Technical Specs

SpecificationValue
Model IDlightricks/ltx-2-19b/distilled/extend-video
Required inputsprompt
ExecutionAsynchronous generation job
Request controls9 documented fields
Outputurl, content_type

Request fields

FieldType and constraints
seedinteger; Optional
videostring; Optional
promptstring; Required
end_imagestring; Optional
audio_strengthnumber; Optional; Range: 0–1; Default: 1
generate_audioboolean; Optional; Default: true
video_strengthnumber; Optional; Range: 0–1; Default: 1
extend_directionstring; Optional; Options: forward, backward; Default: "forward"
end_image_strengthnumber; Optional; Range: 0–1; Default: 1

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