lightricks/ltx-2-19b/text-to-video

Name: LTX-2 19B
Author: Lightricks

Ltx 2 19b is Lightricks's text-to-video AI model. Turn written scripts and prompts into professional-quality video clips with realistic motion, lighting, and scene composition.

Input

Prompt(string)

The prompt to generate the video from.

Generate Audio(boolean)

Whether to generate audio for the video.

Guidance Scale(number)

110

The guidance scale to use. Range: 1 to 10.

Number of Inference Steps(integer)

850

The number of inference steps to use. Range: 8 to 50.

Seed(integer)

The seed for the random number generator.

Number of Frames(integer)

9481

The number of frames to generate. Range: 9 to 481.

Video Size(string)

The size of the generated video. Allowed values: square_hd, square, portrait_4_3, portrait_16_9, landscape_4_3, landscape_16_9.

FPS(number)

160

The frames per second of the generated video. Range: 1 to 60.

Video Quality(string)

The quality of the generated video. Allowed values: low, medium, high, maximum.

Video Output Type(string)

The output type of the generated video. Allowed values: X264 (.mp4), VP9 (.webm), PRORES4444 (.mov), GIF (.gif).

Camera LoRA Scale(number)

The scale of the camera LoRA to use. This allows you to control the camera movement of the generated video more accurately than just prompting the model to move the camera. Range: 0 to 1.

Camera LoRA(string)

The camera LoRA to use. This allows you to control the camera movement of the generated video more accurately than just prompting the model to move the camera. Allowed values: dolly_in, dolly_out, dolly_left, dolly_right, jib_up, jib_down, static, none.

Use Multi-Scale(boolean)

Whether to use multi-scale generation. If True, the model will generate the video at a smaller scale first, then use the smaller video to guide the generation of a video at or above your requested size. This results in better coherence and details.

Video Write Mode(string)

The write mode of the generated video. Allowed values: fast, balanced, small.

Idle

Example output — click Run to generate your own

Production endpoint

Send your first request

OpenAI-compatible endpoint with unified authentication and usage tracking.

POSThttps://api.sandbase.ai/v1/run

Model IDlightricks/ltx-2-19b/text-to-video

Input Schema

14 parameters · 1 required · 13 optional

Parameter	Type	Required	Description
`prompt`	string	Required	The prompt to generate the video from.
`fps`	number	Optional	The frames per second of the generated video. · Min: 1 · Max: 60 · Default: 25
`seed`	integer	Optional	The seed for the random number generator.
`num_frames`	integer	Optional	The number of frames to generate. · Min: 9 · Max: 481 · Default: 121
`video_size`	string	Optional	The size of the generated video. · Options: square_hd, square, portrait_4_3, portrait_16_9, landscape_4_3, landscape_16_9 · Default: "landscape_4_3" square_hdsquareportrait_4_3portrait_16_9landscape_4_3landscape_16_9
`camera_lora`	string	Optional	The camera LoRA to use. This allows you to control the camera movement of the generated video more accurately than just prompting the model to move the camera. · Options: dolly_in, dolly_out, dolly_left, dolly_right, jib_up, jib_down, static, none · Default: "none" dolly_indolly_outdolly_leftdolly_rightjib_upjib_downstaticnone
`video_quality`	string	Optional	The quality of the generated video. · Options: low, medium, high, maximum · Default: "high" lowmediumhighmaximum
`generate_audio`	boolean	Optional	Whether to generate audio for the video. · Default: true
`guidance_scale`	number	Optional	The guidance scale to use. · Min: 1 · Max: 10 · Default: 3
`use_multiscale`	boolean	Optional	Whether to use multi-scale generation. If True, the model will generate the video at a smaller scale first, then use the smaller video to guide the generation of a video at or above your requested size. This results in better coherence and details. · Default: true
`video_write_mode`	string	Optional	The write mode of the generated video. · Options: fast, balanced, small · Default: "balanced" fastbalancedsmall
`camera_lora_scale`	number	Optional	The scale of the camera LoRA to use. This allows you to control the camera movement of the generated video more accurately than just prompting the model to move the camera. · Min: 0 · Max: 1 · Default: 1
`video_output_type`	string	Optional	The output type of the generated video. · Options: X264 (.mp4), VP9 (.webm), PRORES4444 (.mov), GIF (.gif) · Default: "X264 (.mp4)" X264 (.mp4)VP9 (.webm)PRORES4444 (.mov)GIF (.gif)
`num_inference_steps`	integer	Optional	The number of inference steps to use. · Min: 8 · Max: 50 · Default: 40

Output Schema

Field	Type	Description
`id`	string	Unique identifier for the generation task
`status`	string	Task status: pending, running, completed, failed, timeout
`model`	string	Model used for the generation
`outputs`	array	Array of output items
`outputs[].url`	string	URL of the generated artifact
`outputs[].content_type`	string	MIME type (e.g. image/png, video/mp4)
`error`	object \| null	Error details if failed, null on success
`error.type`	string	Machine-readable error type code
`error.message`	string	Human-readable error description

Async Workflow

This model uses asynchronous execution. Submit a request and poll for the result.

Submit — POST to /v1/run, receive an id
Poll — GET /v1/run/{id} until status is completed, failed, or timeout
Retrieve — Read outputs from the completed response

Code Examples

Ready-to-run snippets

# Step 1: Submit
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
  "model": "lightricks/ltx-2-19b/text-to-video",
  "fps": 25,
  "prompt": "A cowboy walking through a dusty town at high noon, camera following from behind, cinematic depth, realistic lighting, western mood, 4K film grain.",
  "num_frames": 121,
  "video_size": "landscape_4_3",
  "camera_lora": "none",
  "video_quality": "high",
  "generate_audio": true,
  "guidance_scale": 3,
  "use_multiscale": true,
  "video_write_mode": "balanced",
  "camera_lora_scale": 1,
  "video_output_type": "X264 (.mp4)",
  "num_inference_steps": 40
}'

# Step 2: Poll result (replace <id>)
curl https://api.sandbase.ai/v1/run/<id> \
  -H "Authorization: Bearer YOUR_API_KEY"

← Back to LTX-2 19B

API README

LTX-2 19B

LTX-2 19B is a text-to-video creation 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 standard route keeps that workflow explicit instead of hiding its input assumptions behind a generic video-generation label.

In practice, this route accepts a written prompt as creative context and exposes num frames, video size, generate audio, camera lora 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

Scene built from language. No source image is required: the prompt defines subject, action, environment, camera, light, and temporal progression.
Purposeful camera direction. camera_lora offers named dolly, jib, static, and lateral camera paths.
Native soundtrack option. generate_audio can request sound as part of the same generated scene.
LTX 2 19B format-first generation. Resolution, video size, aspect ratio, duration, or frame count can be fixed before rendering where the schema exposes them. This behavior is exposed on the named 19B route. For lightricks/ltx-2-19b/text-to-video, this task-specific control is documented alongside the route’s own required inputs.

Pricing

Billing unit	Price
Base request	`$0.001800`

When to Use

Scenario	Recommendation
Choose this route	Use it when the deliverable specifically calls for text-to-video creation, rather than a neighboring generation mode.
Prepare the source	Provide a precise written brief in the format described by the request schema.
Direct the shot	Describe the subject, action, environment, camera movement, lighting, and temporal progression in that order.
Control continuity	Use endpoint frames, reference media, strength, or audio controls when those fields are available instead of burying hard constraints in prose.
Plan delivery	Set 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 text-to-video creation, 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": "A cowboy walking through a dusty town at high noon, camera following from behind, cinematic depth, realistic lighting, western mood, 4K film grain.",
  "generate_audio": true
}

Technical Specs

Specification	Value
Model ID	`lightricks/ltx-2-19b/text-to-video`
Required inputs	`prompt`
Execution	Asynchronous generation job
Request controls	14 documented fields
Output	`url`, `content_type`

Request fields

Field	Type and constraints
`fps`	number; Optional; Range: 1–60; Default: 25
`seed`	integer; Optional
`prompt`	string; Required
`num_frames`	integer; Optional; Range: 9–481; Default: 121
`video_size`	string; Optional; Options: square_hd, square, portrait_4_3, portrait_16_9, landscape_4_3, landscape_16_9; Default: "landscape_4_3"
`camera_lora`	string; Optional; Options: dolly_in, dolly_out, dolly_left, dolly_right, jib_up, jib_down, static, none; Default: "none"
`video_quality`	string; Optional; Options: low, medium, high, maximum; Default: "high"
`generate_audio`	boolean; Optional; Default: true
`guidance_scale`	number; Optional; Range: 1–10; Default: 3
`use_multiscale`	boolean; Optional; Default: true
`video_write_mode`	string; Optional; Options: fast, balanced, small; Default: "balanced"
`camera_lora_scale`	number; Optional; Range: 0–1; Default: 1
`video_output_type`	string; Optional; Options: X264 (.mp4), VP9 (.webm), PRORES4444 (.mov), GIF (.gif); Default: "X264 (.mp4)"
`num_inference_steps`	integer; Optional; Range: 8–50; Default: 40