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

LoRA adapters applied to the generation. At most three items are accepted.

Response Schema

The submit endpoint returns a run response. If its status is pending or running, poll GET /v1/run/{id} with the returned opaque ID until it reaches a terminal state.

stringidrequired

Opaque SandBase run identifier. Use it exactly as returned; no prefix is guaranteed.

stringstatusrequired

Current public run status.

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

Optional<string>model

Public SandBase model name used for this run.

Optional<array<object>>outputs

Present only for completed runs. Each object is capability-specific; inspect the selected model schema for its fields.

Optional<object>error

Present only for failed or timeout runs. Contains a public error type and sanitized message.

Optional<string>error.type

Stable public error category.

Optional<string>error.message

Sanitized error message safe to show to clients.

Optional<object>usage

Usage details when available.

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/f3d2e8a1-7c4b-4a12-9d2e-123456789abc \
  -H "Authorization: Bearer $SANDBASE_API_KEY"

Response202 Accepted

{
  "id": "f3d2e8a1-7c4b-4a12-9d2e-123456789abc",
  "model": "lightricks/ltx-2-19b/audio-to-video/lora",
  "status": "running"
}