> ## Documentation Index > Fetch the complete documentation index at: https://apidoc.cometapi.com/llms.txt > Use this file to discover all available pages before exploring further. # Crear una tarea de imagen a video de Runway > Usa CometAPI para llamar a Runway image_to_video y convertir la URL de una imagen fija en salida de video sin procesar, con compatibilidad mediante X-Runway-Version. Usa este endpoint para animar una imagen de origen en un video de Runway. ## Antes de llamarlo * Envía el encabezado `X-Runway-Version` requerido, por ejemplo `2024-11-06` * Usa `model: gen3a_turbo` * Proporciona un `promptImage` HTTPS estable * Comienza con `duration: 5` y un valor de ratio compatible para el modelo/versión de Runway seleccionado ## Duration y ratio | Setting | Supported values | Default starting point | Boundary behavior | | -------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------- | ---------------------- | ----------------------------------------------------------------------------------------------------------------------------------- | | `duration` | Depende del modelo/versión de Runway; usa `5` o `10` para la compatibilidad más amplia | `5` | CometAPI reenvía el valor a Runway. Si el modelo/versión seleccionado lo rechaza, vuelve a intentarlo con `5`. | | `ratio` con `X-Runway-Version: 2024-11-06` | Valores de estilo resolución dependientes del modelo/versión de Runway, como `1280:768`, `768:1280`, `1280:720` o `720:1280` | `1280:768` | Los valores solicitados pueden normalizarse en el medio completado; inspecciona el video final antes de confiar en píxeles exactos. | | `ratio` con versiones de compatibilidad anteriores | `16:9`, `9:16` o los valores de estilo resolución aceptados por el modelo/versión seleccionado | `16:9` o `1280:768` | Para integraciones en producción, prefiere los valores actuales de Runway de estilo resolución. | Las solicitudes en formato oficial de Runway usan `ratio`, no `size`. Interpreta los valores de ratio de estilo resolución como su equivalente `WxH`: `1280:720` corresponde a `1280x720`, `720:1280` corresponde a `720x1280`, y `1280:768` aún puede renderizarse como `1280x720` según el modelo/versión seleccionado. ## Flujo de la tarea Crea la tarea con una imagen de origen y un Prompt de movimiento corto opcional. Guarda el `id` de la tarea para consultarlo más tarde. Usa [Obtener una tarea de Runway](./runway-to-get-task-details). Si la primera consulta devuelve `task_not_exist`, espera unos segundos y vuelve a intentarlo. ## OpenAPI ````yaml api/openapi/video/runway/official-format/post-runway-images-raw-video.openapi.json POST /runwayml/v1/image_to_video openapi: 3.1.0 info: title: Image to Video API version: 1.0.0 description: >- Create a Runway image-to-video task through the official-format CometAPI route. servers: - url: https://api.cometapi.com security: - bearerAuth: [] paths: /runwayml/v1/image_to_video: post: summary: Create a Runway image-to-video task description: >- Submit a source image plus optional motion prompt and receive a task id for later polling. operationId: runway_images_raw_video parameters: - name: X-Runway-Version in: header required: true description: Runway version header, for example `2024-11-06`. schema: type: string requestBody: required: true content: application/json: schema: type: object required: - promptImage - model properties: promptImage: type: string description: Source image URL. default: >- https://cdn.britannica.com/70/234870-050-D4D024BB/Orange-colored-cat-yawns-displaying-teeth.jpg seed: type: integer description: 'Random seed for reproducible results. Range: 0–999999999.' model: type: string description: >- Runway image-to-video model ID. Choose an available model from the [Models page](/overview/models). default: gen3a_turbo promptText: type: string description: >- Text prompt describing the desired motion or scene. Maximum 512 characters. watermark: type: boolean description: Whether to add a watermark to the output video. default: false duration: type: integer description: >- Video duration in seconds. Runway support is model/version dependent; use 5 or 10 for the broadest compatibility. CometAPI forwards this value to Runway. default: 5 ratio: type: string description: >- Requested output ratio. Accepted values are Runway model/version dependent. With X-Runway-Version 2024-11-06, use a resolution-style value accepted by the selected model, such as 1280:768, 768:1280, 1280:720, or 720:1280. Read these as WxH targets, but completed media may normalize, so inspect the returned file before relying on exact pixels. default: '1280:768' default: promptImage: >- https://cdn.britannica.com/70/234870-050-D4D024BB/Orange-colored-cat-yawns-displaying-teeth.jpg seed: 1 model: gen3a_turbo promptText: A calm camera move. watermark: false duration: 5 ratio: '1280:768' examples: Default: summary: Default value: promptImage: >- https://cdn.britannica.com/70/234870-050-D4D024BB/Orange-colored-cat-yawns-displaying-teeth.jpg seed: 1 model: gen3a_turbo promptText: A calm camera move. watermark: false duration: 5 ratio: '1280:768' responses: '200': description: Task accepted. content: application/json: schema: type: object required: - id properties: id: type: string example: id: d0658ae1-bbdd-4adc-aaba-fd8070e14d79 x-codeSamples: - lang: Shell label: Default source: | curl https://api.cometapi.com/runwayml/v1/image_to_video \ -H "Authorization: Bearer $COMETAPI_KEY" \ -H "Content-Type: application/json" \ -d '{ "promptImage": "https://your-image-host/first-frame.png", "promptText": "A calm camera move.", "model": "gen3a_turbo", "ratio": "1280:768", "duration": 5 }' - lang: Python label: Default source: > import os import requests response = requests.post( "https://api.cometapi.com/runwayml/v1/image_to_video", headers={"Authorization": "Bearer " + os.environ["COMETAPI_KEY"]}, json={ "promptImage": "https://your-image-host/first-frame.png", "promptText": "A calm camera move.", "model": "gen3a_turbo", "ratio": "1280:768", "duration": 5 }, ) task = response.json() print(task["id"]) # poll GET /runwayml/v1/tasks/{id} until the output array appears - lang: JavaScript label: Default source: > const response = await fetch("https://api.cometapi.com/runwayml/v1/image_to_video", { method: "POST", headers: { Authorization: `Bearer ${process.env.COMETAPI_KEY}`, "Content-Type": "application/json", }, body: JSON.stringify({ "promptImage": "https://your-image-host/first-frame.png", "promptText": "A calm camera move.", "model": "gen3a_turbo", "ratio": "1280:768", "duration": 5 }), }); const task = await response.json(); console.log(task.id); // poll GET /runwayml/v1/tasks/{id} until the output array appears components: securitySchemes: bearerAuth: type: http scheme: bearer description: Bearer token authentication. Use your CometAPI key. ````