# Framepack > Framepack is an efficient Image-to-video model that autoregressively generates videos. ## Overview - **Endpoint**: `https://fal.run/fal-ai/framepack/flf2v` - **Model ID**: `fal-ai/framepack/flf2v` - **Category**: image-to-video - **Kind**: inference **Tags**: image to video, motion ## Pricing - **Price**: $0.0333 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_): Text prompt for video generation (max 500 characters). - Examples: "A tabby cat is confidely strolling toward the camera, when it spins and with a flash of magic reveals itself to be a cat-dragon hybrid with glistening amber scales." - **`negative_prompt`** (`string`, _optional_): Negative prompt for video generation. Default value: `""` - Default: `""` - Examples: "Ugly, blurry distorted, bad quality" - **`image_url`** (`string`, _required_): URL of the image input. - Examples: "https://storage.googleapis.com/falserverless/web-examples/wan_flf/first_frame.png" - **`seed`** (`integer`, _optional_): The seed to use for generating the video. - **`aspect_ratio`** (`AspectRatio(W:H)Enum`, _optional_): The aspect ratio of the video to generate. Default value: `"16:9"` - Default: `"16:9"` - Options: `"16:9"`, `"9:16"` - **`resolution`** (`ResolutionEnum`, _optional_): The resolution of the video to generate. 720p generations cost 1.5x more than 480p generations. Default value: `"480p"` - Default: `"480p"` - Options: `"720p"`, `"480p"` - **`cfg_scale`** (`float`, _optional_): Classifier-Free Guidance scale for the generation. Default value: `1` - Default: `1` - Range: `0` to `7` - **`guidance_scale`** (`float`, _optional_): Guidance scale for the generation. Default value: `10` - Default: `10` - Range: `0` to `32` - **`num_frames`** (`integer`, _optional_): The number of frames to generate. Default value: `240` - Default: `240` - Range: `30` to `1800` - **`enable_safety_checker`** (`boolean`, _optional_): If set to true, the safety checker will be enabled. - Default: `false` - Examples: true - **`end_image_url`** (`string`, _required_): URL of the end image input. - Examples: "https://storage.googleapis.com/falserverless/web-examples/wan_flf/last_frame.png" - **`strength`** (`float`, _optional_): Determines the influence of the final frame on the generated video. Higher values result in the output being more heavily influenced by the last frame. Default value: `0.8` - Default: `0.8` - Range: `0` to `1` **Required Parameters Example**: ```json { "prompt": "A tabby cat is confidely strolling toward the camera, when it spins and with a flash of magic reveals itself to be a cat-dragon hybrid with glistening amber scales.", "image_url": "https://storage.googleapis.com/falserverless/web-examples/wan_flf/first_frame.png", "end_image_url": "https://storage.googleapis.com/falserverless/web-examples/wan_flf/last_frame.png" } ``` **Full Example**: ```json { "prompt": "A tabby cat is confidely strolling toward the camera, when it spins and with a flash of magic reveals itself to be a cat-dragon hybrid with glistening amber scales.", "negative_prompt": "Ugly, blurry distorted, bad quality", "image_url": "https://storage.googleapis.com/falserverless/web-examples/wan_flf/first_frame.png", "aspect_ratio": "16:9", "resolution": "480p", "cfg_scale": 1, "guidance_scale": 10, "num_frames": 240, "enable_safety_checker": true, "end_image_url": "https://storage.googleapis.com/falserverless/web-examples/wan_flf/last_frame.png", "strength": 0.8 } ``` ### Output Schema The API returns the following output format: - **`video`** (`File`, _required_) - Examples: {"url":"https://storage.googleapis.com/falserverless/example_outputs/flf2v.mp4"} - **`seed`** (`integer`, _required_): The seed used for generating the video. **Example Response**: ```json { "video": { "url": "https://storage.googleapis.com/falserverless/example_outputs/flf2v.mp4" } } ``` ## Usage Examples ### cURL ```bash curl --request POST \ --url https://fal.run/fal-ai/framepack/flf2v \ --header "Authorization: Key $FAL_KEY" \ --header "Content-Type: application/json" \ --data '{ "prompt": "A tabby cat is confidely strolling toward the camera, when it spins and with a flash of magic reveals itself to be a cat-dragon hybrid with glistening amber scales.", "image_url": "https://storage.googleapis.com/falserverless/web-examples/wan_flf/first_frame.png", "end_image_url": "https://storage.googleapis.com/falserverless/web-examples/wan_flf/last_frame.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/framepack/flf2v", arguments={ "prompt": "A tabby cat is confidely strolling toward the camera, when it spins and with a flash of magic reveals itself to be a cat-dragon hybrid with glistening amber scales.", "image_url": "https://storage.googleapis.com/falserverless/web-examples/wan_flf/first_frame.png", "end_image_url": "https://storage.googleapis.com/falserverless/web-examples/wan_flf/last_frame.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/framepack/flf2v", { input: { prompt: "A tabby cat is confidely strolling toward the camera, when it spins and with a flash of magic reveals itself to be a cat-dragon hybrid with glistening amber scales.", image_url: "https://storage.googleapis.com/falserverless/web-examples/wan_flf/first_frame.png", end_image_url: "https://storage.googleapis.com/falserverless/web-examples/wan_flf/last_frame.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/framepack/flf2v) - [API Documentation](https://fal.ai/models/fal-ai/framepack/flf2v/api) - [OpenAPI Schema](https://fal.ai/api/openapi/queue/openapi.json?endpoint_id=fal-ai/framepack/flf2v) ### 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)