# Kling O1 First Frame Last Frame to Video [Standard] > Generate a video by taking a start frame and an end frame, animating the transition between them while following text-driven style and scene guidance. ## Overview - **Endpoint**: `https://fal.run/fal-ai/kling-video/o1/standard/image-to-video` - **Model ID**: `fal-ai/kling-video/o1/standard/image-to-video` - **Category**: image-to-video - **Kind**: inference ## Pricing - **Price**: $0.084 per seconds For more details, see [fal.ai pricing](https://fal.ai/pricing). ## API Information This model can be used via our HTTP API or more conveniently via our client libraries. See the input and output schema below, as well as the usage examples. ### Input Schema The API accepts the following input parameters: - **`prompt`** (`string`, _required_): Use @Image1 to reference the start frame, @Image2 to reference the end frame. - Examples: "Create a magical timelapse transition. The snow melts rapidly to reveal green grass, and the tree branches burst into bloom with pink flowers in real-time. The lighting shifts from cold winter light to warm spring sunshine. The camera pushes in slowly towards the tree. Disney-style magical transformation, cinematic, 8k." - **`start_image_url`** (`string`, _required_): Image to use as the first frame of the video. Max file size: 10.0MB, Min width: 300px, Min height: 300px, Min aspect ratio: 0.40, Max aspect ratio: 2.50, Timeout: 20.0s - Examples: "https://v3b.fal.media/files/b/rabbit/NaslJIC7F2WodS6DFZRRJ.png" - **`end_image_url`** (`string`, _optional_): Image to use as the last frame of the video. - Examples: "https://v3b.fal.media/files/b/tiger/BwHi22qoQnqaTNMMhe533.png" - **`duration`** (`DurationEnum`, _optional_): Video duration in seconds. Default value: `"5"` - Default: `"5"` - Options: `"3"`, `"4"`, `"5"`, `"6"`, `"7"`, `"8"`, `"9"`, `"10"` **Required Parameters Example**: ```json { "prompt": "Create a magical timelapse transition. The snow melts rapidly to reveal green grass, and the tree branches burst into bloom with pink flowers in real-time. The lighting shifts from cold winter light to warm spring sunshine. The camera pushes in slowly towards the tree. Disney-style magical transformation, cinematic, 8k.", "start_image_url": "https://v3b.fal.media/files/b/rabbit/NaslJIC7F2WodS6DFZRRJ.png" } ``` **Full Example**: ```json { "prompt": "Create a magical timelapse transition. The snow melts rapidly to reveal green grass, and the tree branches burst into bloom with pink flowers in real-time. The lighting shifts from cold winter light to warm spring sunshine. The camera pushes in slowly towards the tree. Disney-style magical transformation, cinematic, 8k.", "start_image_url": "https://v3b.fal.media/files/b/rabbit/NaslJIC7F2WodS6DFZRRJ.png", "end_image_url": "https://v3b.fal.media/files/b/tiger/BwHi22qoQnqaTNMMhe533.png", "duration": "5" } ``` ### Output Schema The API returns the following output format: - **`video`** (`File`, _required_): The generated video. - Examples: {"url":"https://v3b.fal.media/files/b/koala/knryyyGF3ZVyMMrGr77CL_output.mp4","content_type":"video/mp4","file_name":"output.mp4","file_size":27588984} **Example Response**: ```json { "video": { "url": "https://v3b.fal.media/files/b/koala/knryyyGF3ZVyMMrGr77CL_output.mp4", "content_type": "video/mp4", "file_name": "output.mp4", "file_size": 27588984 } } ``` ## Usage Examples ### cURL ```bash curl --request POST \ --url https://fal.run/fal-ai/kling-video/o1/standard/image-to-video \ --header "Authorization: Key $FAL_KEY" \ --header "Content-Type: application/json" \ --data '{ "prompt": "Create a magical timelapse transition. The snow melts rapidly to reveal green grass, and the tree branches burst into bloom with pink flowers in real-time. The lighting shifts from cold winter light to warm spring sunshine. The camera pushes in slowly towards the tree. Disney-style magical transformation, cinematic, 8k.", "start_image_url": "https://v3b.fal.media/files/b/rabbit/NaslJIC7F2WodS6DFZRRJ.png" }' ``` ### Python Ensure you have the Python client installed: ```bash pip install fal-client ``` Then use the API client to make requests: ```python import fal_client def on_queue_update(update): if isinstance(update, fal_client.InProgress): for log in update.logs: print(log["message"]) result = fal_client.subscribe( "fal-ai/kling-video/o1/standard/image-to-video", arguments={ "prompt": "Create a magical timelapse transition. The snow melts rapidly to reveal green grass, and the tree branches burst into bloom with pink flowers in real-time. The lighting shifts from cold winter light to warm spring sunshine. The camera pushes in slowly towards the tree. Disney-style magical transformation, cinematic, 8k.", "start_image_url": "https://v3b.fal.media/files/b/rabbit/NaslJIC7F2WodS6DFZRRJ.png" }, with_logs=True, on_queue_update=on_queue_update, ) print(result) ``` ### JavaScript Ensure you have the JavaScript client installed: ```bash npm install --save @fal-ai/client ``` Then use the API client to make requests: ```javascript import { fal } from "@fal-ai/client"; const result = await fal.subscribe("fal-ai/kling-video/o1/standard/image-to-video", { input: { prompt: "Create a magical timelapse transition. The snow melts rapidly to reveal green grass, and the tree branches burst into bloom with pink flowers in real-time. The lighting shifts from cold winter light to warm spring sunshine. The camera pushes in slowly towards the tree. Disney-style magical transformation, cinematic, 8k.", start_image_url: "https://v3b.fal.media/files/b/rabbit/NaslJIC7F2WodS6DFZRRJ.png" }, logs: true, onQueueUpdate: (update) => { if (update.status === "IN_PROGRESS") { update.logs.map((log) => log.message).forEach(console.log); } }, }); console.log(result.data); console.log(result.requestId); ``` ## Additional Resources ### Documentation - [Model Playground](https://fal.ai/models/fal-ai/kling-video/o1/standard/image-to-video) - [API Documentation](https://fal.ai/models/fal-ai/kling-video/o1/standard/image-to-video/api) - [OpenAPI Schema](https://fal.ai/api/openapi/queue/openapi.json?endpoint_id=fal-ai/kling-video/o1/standard/image-to-video) ### fal.ai Platform - [Platform Documentation](https://docs.fal.ai) - [Python Client](https://docs.fal.ai/clients/python) - [JavaScript Client](https://docs.fal.ai/clients/javascript)