Ltx 2 19b Control API Documentation

Ltx 2 19b Control API Documentation

Playground

LTX-2 19B ControlNet generates synchronized audio-video (up to 20s) from video input with pose, depth, or canny edge guidance. Supports audio preservation, generation, or removal for flexible video transformation. Ready-to-use REST inference API, best performance, no cold starts, affordable pricing.

Features

LTX-2 ControlNet is a video-to-video transformation model that applies pose, depth, or edge guidance to generate new video content while preserving motion structure from the input. Built on the 19B DiT architecture, it supports synchronized audio handling with options to preserve original audio, generate new audio, or output silent video.

Why Choose This?

• ControlNet guidance modes Choose from pose, depth, or canny edge detection to guide video generation while preserving motion structure.

• Flexible audio handling Preserve original audio, generate new synchronized audio, or create silent output.

• High-fidelity output Leverages the 19B-parameter DiT architecture for detailed, temporally consistent video.

• Character-driven transformation Use a reference image to drive the appearance while the input video controls motion.

• Prompt Enhancer Built-in tool to automatically improve your prompts for better results.

Parameters

Control Modes

Audio Modes

How to Use

1. Upload your video — the input video providing motion structure.
2. Upload your image (optional) — reference image that defines appearance.
3. Write your prompt — describe the desired transformation.
4. Select control mode — pose, depth, or canny based on your needs.
5. Select audio mode — preserve, generate, or none.
6. Set resolution — 480p for speed, 720p for balance, 1080p for quality.
7. Run — submit and download the transformed video.

Pricing

> Billing duration: Input media duration is rounded up to whole seconds. The minimum billed duration is 3 seconds; shorter inputs are billed as 3 seconds. Existing per-5-second rate tables remain unchanged.

Billing Rules

• Base price: $0.20 (720p, 5 seconds)
• Resolution multiplier: 480p = 0.75×, 720p = 1×, 1080p = 1.5×
• Minimum charge: 3 seconds
• Maximum billed duration: 20 seconds
• Total cost = (duration / 5) × $0.20 × resolution_multiplier

Best Use Cases

• Character Animation — Animate a character image with motion from reference video.
• Style Transfer — Apply a reference style to existing video content.
• Motion Preservation — Maintain motion structure while changing appearance.
• Video Editing — Transform video subjects while keeping movement.
• Dance Transfer — Apply dance moves to different characters.

Pro Tips

• Match the subject pose in your image to the starting pose in the video.
• Use pose mode for human/character motion, depth for scene structure, canny for edge-based guidance.
• Preserve audio for lip-sync scenarios, generate for new content.
• Iterate at 480p, then render final at 720p or 1080p.

Notes

• Maximum video duration is 20 seconds per job.
• Videos shorter than 3 seconds are billed as 3 seconds.
• For best results, ensure the reference image matches the subject type in the video.

Related Models

• LTX-2 19B Image-to-Video — Generate video with audio from a reference image.
• LTX-2 19B Text-to-Video — Generate video with audio from text prompts.
• Wan 2.2 Animate — Character animation and replacement model.

Authentication

For authentication details, please refer to the Authentication Guide.

API Endpoints

Submit Task & Query Result

set -euo pipefail

export WAVESPEED_API_KEY="your-api-key"

REQUEST_BODY=$(cat <<'JSON'
{
  "video": "https://interactive-examples.mdn.mozilla.net/media/cc0-videos/flower.mp4",
  "mode": "pose",
  "audio_mode": "preserve",
  "resolution": "720p",
  "seed": -1
}
JSON
)

# 1. Submit the prediction.
SUBMIT_RESPONSE=$(curl --silent --show-error --fail-with-body \
  -X POST "https://api.wavespeed.ai/api/v3/wavespeed-ai/ltx-2-19b/control" \
  -H "Authorization: Bearer ${WAVESPEED_API_KEY}" \
  -H "Content-Type: application/json" \
  -d "${REQUEST_BODY}")

TASK=$(printf '%s' "${SUBMIT_RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
PREDICTION_ID=$(printf '%s' "${TASK}" | jq -r '.id // empty')
if [ -z "${PREDICTION_ID}" ]; then
  printf 'Submission response did not contain a prediction id
' >&2
  exit 1
fi
RESULT_URL=$(printf '%s' "${TASK}" | jq -r '.urls.get // empty')
if [ -z "${RESULT_URL}" ]; then RESULT_URL="https://api.wavespeed.ai/api/v3/predictions/${PREDICTION_ID}/result"; fi

# 2. Poll until the prediction finishes.
while true; do
  RESPONSE=$(curl --silent --show-error --fail-with-body \
    "${RESULT_URL}" \
    -H "Authorization: Bearer ${WAVESPEED_API_KEY}")
  RESULT=$(printf '%s' "${RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
  STATUS=$(printf '%s' "${RESULT}" | jq -r '.status // empty')

  case "${STATUS}" in
    completed) printf '%s\n' "${RESULT}" | jq '.outputs'; break ;;
    failed|cancelled|timeout) printf '%s\n' "${RESULT}" | jq . >&2; exit 1 ;;
    created|processing) sleep 2 ;;
    *) printf 'Unexpected status: %s
' "${STATUS}" >&2; exit 1 ;;
  esac
done

Parameters

Task Submission Parameters

Request Parameters

Response Parameters

Result Request Parameters

Result Response Parameters