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LTX-2 19B Text-to-Video LoRA: Generación realista de texto a vídeo con audio sincronizado | RunComfy

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

Convierte prompts de texto en vídeos con audio sincronizado, control de estilo mediante LoRA, claridad 4K y movimiento fluido para anuncios cinematográficos, narrativas y contenidos de marca.

Índice

1. Primeros pasos2. Autenticación3. Referencia de la APIEnviar una solicitudEstado de la solicitudObtener resultadosCancelar solicitud4. Archivos de entradaArchivo alojado (URL)5. EsquemaEsquema de entradaEsquema de salida

1. Primeros pasos

Usa la API de RunComfy para ejecutar ltx/ltx-2-19b/text-to-video/lora. Para entradas y salidas admitidas, consulta el esquema.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/ltx/ltx-2-19b/text-to-video/lora \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "An astronaut hatches from a fragile egg on the surface of the Moon, the shell cracking and peeling apart in gentle low-gravity motion. Fine lunar dust lifts and drifts outward with each movement, floating in slow arcs before settling back onto the ground. The astronaut pushes free in a deliberate, weightless motion, small fragments of the egg tumbling and spinning through the air. In the background, the deep darkness of space subtly shifts as stars glide with the camera's movement, emphasizing vast depth and scale. The camera performs a smooth, cinematic slow push-in, with natural parallax between the foreground dust, the astronaut, and the distant starfield. Ultra-realistic detail, physically accurate low-gravity motion, cinematic lighting, and a breath-taking, movie-like shot.An astronaut hatches from a fragile egg on the surface of the Moon, the shell cracking and peeling apart in gentle low-gravity motion. Fine lunar dust lifts and drifts outward with each movement, floating in slow arcs before settling back onto the ground. The astronaut pushes free in a deliberate, weightless motion, small fragments of the egg tumbling and spinning through the air. In the background, the deep darkness of space subtly shifts as stars glide with the camera's movement, emphasizing vast depth and scale. The camera performs a smooth, cinematic slow push-in, with natural parallax between the foreground dust, the astronaut, and the distant starfield. Ultra-realistic detail, physically accurate low-gravity motion, cinematic lighting, and a breath-taking, movie-like shot."
  }'

2. Autenticación

Define la variable de entorno YOUR_API_TOKEN con tu clave API (gestión en Perfil) e incluye en cada solicitud un token Bearer en la cabecera Authorization : Authorization: Bearer $YOUR_API_TOKEN.

3. Referencia de la API

Enviar una solicitud

Envía un trabajo de generación asíncrono y recibe de inmediato un request_id y URLs para consultar estado, obtener resultados y cancelar.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/ltx/ltx-2-19b/text-to-video/lora \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "An astronaut hatches from a fragile egg on the surface of the Moon, the shell cracking and peeling apart in gentle low-gravity motion. Fine lunar dust lifts and drifts outward with each movement, floating in slow arcs before settling back onto the ground. The astronaut pushes free in a deliberate, weightless motion, small fragments of the egg tumbling and spinning through the air. In the background, the deep darkness of space subtly shifts as stars glide with the camera's movement, emphasizing vast depth and scale. The camera performs a smooth, cinematic slow push-in, with natural parallax between the foreground dust, the astronaut, and the distant starfield. Ultra-realistic detail, physically accurate low-gravity motion, cinematic lighting, and a breath-taking, movie-like shot.An astronaut hatches from a fragile egg on the surface of the Moon, the shell cracking and peeling apart in gentle low-gravity motion. Fine lunar dust lifts and drifts outward with each movement, floating in slow arcs before settling back onto the ground. The astronaut pushes free in a deliberate, weightless motion, small fragments of the egg tumbling and spinning through the air. In the background, the deep darkness of space subtly shifts as stars glide with the camera's movement, emphasizing vast depth and scale. The camera performs a smooth, cinematic slow push-in, with natural parallax between the foreground dust, the astronaut, and the distant starfield. Ultra-realistic detail, physically accurate low-gravity motion, cinematic lighting, and a breath-taking, movie-like shot."
  }'

Estado de la solicitud

Obtiene el estado actual de un request_id ("in_queue", "in_progress", "completed" o "cancelled").

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
  --header "Authorization: Bearer <token>"

Obtener resultados

Obtiene las salidas finales y metadatos del request_id; si el trabajo no ha terminado, la respuesta devuelve el estado actual para seguir haciendo polling.

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
  --header "Authorization: Bearer <token>"

Cancelar solicitud

Cancela un trabajo en cola por request_id; los trabajos en curso no se pueden cancelar.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
  --header "Authorization: Bearer <token>"

4. Archivos de entrada

Archivo alojado (URL)

Proporciona una URL HTTPS públicamente accesible. El host debe permitir peticiones del servidor (sin login/cookies), sin rate limit agresivo ni bloqueo de bots. Recomendado: imágenes ≤ 50 MB (~4K), vídeos ≤ 100 MB (~2–5 min a 720p). Para activos privados, URLs estables o firmadas.

5. Esquema

Esquema de entrada

{
  "type": "object",
  "title": "Esquema de entrada",
  "required": [
    "prompt"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "",
      "type": "string",
      "default": "An astronaut hatches from a fragile egg on the surface of the Moon, the shell cracking and peeling apart in gentle low-gravity motion. Fine lunar dust lifts and drifts outward with each movement, floating in slow arcs before settling back onto the ground. The astronaut pushes free in a deliberate, weightless motion, small fragments of the egg tumbling and spinning through the air. In the background, the deep darkness of space subtly shifts as stars glide with the camera's movement, emphasizing vast depth and scale. The camera performs a smooth, cinematic slow push-in, with natural parallax between the foreground dust, the astronaut, and the distant starfield. Ultra-realistic detail, physically accurate low-gravity motion, cinematic lighting, and a breath-taking, movie-like shot.An astronaut hatches from a fragile egg on the surface of the Moon, the shell cracking and peeling apart in gentle low-gravity motion. Fine lunar dust lifts and drifts outward with each movement, floating in slow arcs before settling back onto the ground. The astronaut pushes free in a deliberate, weightless motion, small fragments of the egg tumbling and spinning through the air. In the background, the deep darkness of space subtly shifts as stars glide with the camera's movement, emphasizing vast depth and scale. The camera performs a smooth, cinematic slow push-in, with natural parallax between the foreground dust, the astronaut, and the distant starfield. Ultra-realistic detail, physically accurate low-gravity motion, cinematic lighting, and a breath-taking, movie-like shot."
    },
    "resolution": {
      "title": "Resolución",
      "description": "Resolución de salida.",
      "type": "string",
      "enum": [
        "480p",
        "720p",
        "1080p"
      ],
      "default": "720p"
    },
    "aspect_ratio": {
      "title": "Relación de aspecto (A:H)",
      "description": "Formato de salida.",
      "type": "string",
      "enum": [
        "16:9",
        "9:16"
      ],
      "default": "16:9"
    },
    "duration": {
      "title": "Duración",
      "description": "Duración del vídeo en segundos (5–20; predeterminada: 5).",
      "type": "integer",
      "minimum": 5,
      "maximum": 20,
      "default": 5
    },
    "loras": {
      "title": "Configuración de LoRA",
      "description": "Lista de LoRAs que se aplicarán (máximo 3).",
      "type": "array",
      "items": {
        "path": {
          "title": "Ruta LoRA",
          "description": "URL o ID de repositorio de HuggingFace (propietario/repositorio) de los pesos LoRA.",
          "type": "string",
          "format": "str",
          "default": ""
        },
        "scale": {
          "title": "Báscula LoRA",
          "description": "Escala del modelo LoRA.",
          "type": "float",
          "format": "float_slider_with_range",
          "minimum": 0,
          "maximum": 4,
          "default": 1
        }
      },
      "maxItems": 3,
      "minItems": 0
    },
    "seed": {
      "title": "Semilla",
      "description": "Semilla para obtener resultados reproducibles (-1 para un valor aleatorio).",
      "type": "integer",
      "minimum": -1,
      "default": -1
    }
  }
}

Esquema de salida

{
  "output": {
    "type": "object",
    "properties": {
      "image": {
        "type": "string",
        "format": "uri",
        "description": "URL de una sola imagen"
      },
      "video": {
        "type": "string",
        "format": "uri",
        "description": "URL de un solo vídeo"
      },
      "images": {
        "type": "array",
        "description": "varias URLs de imagen",
        "items": {
          "type": "string",
          "format": "uri"
        }
      },
      "videos": {
        "type": "array",
        "description": "varias URLs de vídeo",
        "items": {
          "type": "string",
          "format": "uri"
        }
      }
    }
  }
}
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