Ltx 2.3 Quality

curl -X POST https://superpowers.tools/v1/run \
  -H 'Authorization: Bearer $SP_KEY' \
  -d '{"tool":"fal.ltx-2.3-quality-audio-to-video","input":{"audio_url":"","prompt":""},"idempotency_key":"example-request-1"}'

{
  "type": "object",
  "required": [
    "prompt",
    "audio_url"
  ],
  "properties": {
    "sync_mode": {
      "type": "boolean",
      "description": "If True, the media is returned as a data URI inline in the response. Useful for short-lived requests and tests.",
      "default": false
    },
    "image_strength": {
      "type": "number",
      "description": "Conditioning strength for the optional first frame. 1.0 keeps the image more strictly; lower values give the model more freedom.",
      "default": 0.7
    },
    "num_frames": {
      "type": "integer",
      "description": "The number of frames to generate.",
      "default": 121
    },
    "num_inference_steps": {
      "type": "integer",
      "description": "Number of inference steps. Defaults to 15 and can be increased up to 30.",
      "default": 15
    },
    "negative_prompt": {
      "type": "string",
      "description": "The negative prompt to steer generation away from.",
      "default": "color distortion, overexposure, static, blurry details, subtitles, style, artwork, painting, frame, still, dim overall tone, worst quality, low quality, JPEG compression artifacts, ugly, mutilated, extra fingers, poorly drawn hands, poorly drawn face, deformed, disfigured, malformed limbs, fused fingers, motionless frame, cluttered background, three legs, crowded background, walking backwards"
    },
    "audio_url": {
      "type": "string",
      "description": "The URL of the audio track that drives generation."
    },
    "resolution": {
      "type": "string",
      "description": "Final output size. 'auto' matches the input image aspect ratio when image_url is provided; otherwise it uses a landscape fallback.",
      "default": "auto",
      "enum": [
        "auto",
        "square_hd",
        "square",
        "portrait_4_3",
        "portrait_16_9",
        "landscape_4_3",
        "landscape_16_9"
      ]
    },
    "enable_prompt_expansion": {
      "type": "boolean",
      "description": "Whether to enable prompt expansion.",
      "default": true
    },
    "match_audio_length": {
      "type": "boolean",
      "description": "When enabled, derives the number of frames from the audio duration and frames_per_second. When disabled, uses num_frames.",
      "default": true
    },
    "seed": {
      "type": "integer",
      "description": "Random seed for reproducibility. If None, a random seed is chosen."
    },
    "guidance_scale": {
      "type": "number",
      "description": "Classifier-free guidance scale. The default is tuned for fast, high-quality generation.",
      "default": 1
    },
    "prompt": {
      "type": "string",
      "description": "The prompt to guide the audio-driven video generation."
    },
    "generate_audio": {
      "type": "boolean",
      "description": "Whether to include audio in the returned video. When disabled, the final MP4 is returned without an audio track.",
      "default": true
    },
    "enable_safety_checker": {
      "type": "boolean",
      "description": "Whether to enable the safety checker.",
      "default": true
    },
    "video_write_mode": {
      "type": "string",
      "description": "The write mode of the generated video.",
      "default": "balanced",
      "enum": [
        "fast",
        "balanced",
        "small"
      ]
    },
    "image_url": {
      "type": "string",
      "description": "Optional URL of an image to use as the first frame. When omitted, generation runs from text and audio only."
    },
    "video_quality": {
      "type": "string",
      "description": "The quality preset of the generated video.",
      "default": "high",
      "enum": [
        "low",
        "medium",
        "high",
        "maximum"
      ]
    },
    "frames_per_second": {
      "type": "number",
      "description": "Frames per second of the generated video.",
      "default": 24
    }
  }
}