LTX-2 19B

POST/v1/run

Ltx 2 19b Audio To Video Lora by Lightricks - advanced AI model for audio-to-video. Delivers high-quality results with fast inference, suitable for both creative and production workflows.

Request body

Submit an async generation request. The model field selects the model; other fields are model-specific input parameters.

stringmodelrequired

Model identifier. Set to lightricks/ltx-2-19b/audio-to-video/lora.

Default: lightricks/ltx-2-19b/audio-to-video/lora

stringpromptrequired

The prompt to generate the video from.

stringimagerequired

Optional URL of an image to use as the first frame of the video.

Optional<string>end_image

The URL of the image to use as the end of the video.

Optional<string>audio

The URL of the audio to generate the video from.

Optional<number>image_strength

The strength of the image to use for the video generation.

Range: 0 to 1

Default: 1

Optional<boolean>preprocess_audio

Whether to preprocess the audio before using it as conditioning.

Default: true

Optional<number>end_image_strength

The strength of the end image to use for the video generation.

Range: 0 to 1

Default: 1

Optional<number>audio_strength

Audio conditioning strength. Values below 1.0 will allow the model to change the audio, while a value of exactly 1.0 will use the input audio without modification.

Range: 0 to 1

Default: 1

Optional<integer>seed

The seed for the random number generator.

Optional<integer>num_inference_steps

Number of denoising or inference steps to run when supported.

Range: 8 to 50

Default: 40

Optional<number>guidance_scale

Request parameter supported by this model.

Range: 1 to 10

Default: 3

Optional<array>loras

Request parameter supported by this model.

Response Schema

The submit endpoint returns an accepted generation task. Poll the result endpoint with the returned id for terminal outputs or errors.

Optional<string>error

Error message if the task failed. Empty on success.

stringidrequired

Unique identifier for the generation task.

Optional<string>model

Model ID used for the prediction.

Optional<array>outputs

Array of generated content. Empty when status is not completed.

stringstatusrequired

Status of the task: pending, running, completed, failed, or timeout.

Allowed values: pending, running, completed, failed, timeout

Model capabilities

array<string>capability_tagsrequired

Capabilities declared by the model registry.

Default: audio-to-video

stringexecution_moderequired

Execution mode declared by the model registry.

Default: async

# 1. Submit a generation request
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "lightricks/ltx-2-19b/audio-to-video/lora",
  "prompt": "A woman speaks to the camera",
  "image": "https://static.sandbase.ai/examples/lightricks/ltx-2-19b/audio-to-video/lora/input_image_0.png",
  "audio": "https://static.sandbase.ai/examples/lightricks/ltx-2-19b/audio-to-video/lora/input_audio_1.mp3"
}'

# 2. If the response is still running, poll the returned id
curl https://api.sandbase.ai/v1/run/run_abc123 \
  -H "Authorization: Bearer $SANDBASE_API_KEY"

Response202 Accepted

{
  "id": "run_abc123",
  "model": "lightricks/ltx-2-19b/audio-to-video/lora",
  "status": "running",
  "outputs": []
}