fal Sandbox is here - run all your models together! 🏖️
DocsBlogPricingEnterpriseCareersResearch Grants
Log-inSign-up

Krea Wan 14B Video to Video

fal-ai/krea-wan-14b/video-to-video
Superfast video model based on Wan 2.1 14b by Krea, excelling at real-time video-editing.
Inference
Commercial use
PlaygroundAPI

About

Video To Video

1. Calling the API#

Install the client#

The client provides a convenient way to interact with the model API.

npm install --save @fal-ai/client

Setup your API Key#

Set FAL_KEY as an environment variable in your runtime.

export FAL_KEY="YOUR_API_KEY"

Submit a request#

The client API handles the API submit protocol. It will handle the request status updates and return the result when the request is completed.

import { fal } from "@fal-ai/client";

const result = await fal.subscribe("fal-ai/krea-wan-14b/video-to-video", {
  input: {
    prompt: "A powerful, matte black jeep, its robust frame contrasting with the lush green surroundings, navigates a winding jungle road, kicking up small clouds of dust and loose earth from its tires.",
    video_url: "https://storage.googleapis.com/falserverless/example_inputs/krea_wan_14b_v2v_input.mp4"
  },
  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);

2. Authentication#

The API uses an API Key for authentication. It is recommended you set the FAL_KEY environment variable in your runtime when possible.

API Key#

In case your app is running in an environment where you cannot set environment variables, you can set the API Key manually as a client configuration.
import { fal } from "@fal-ai/client";

fal.config({
  credentials: "YOUR_FAL_KEY"
});

3. Queue#

Submit a request#

The client API provides a convenient way to submit requests to the model.

import { fal } from "@fal-ai/client";

const { request_id } = await fal.queue.submit("fal-ai/krea-wan-14b/video-to-video", {
  input: {
    prompt: "A powerful, matte black jeep, its robust frame contrasting with the lush green surroundings, navigates a winding jungle road, kicking up small clouds of dust and loose earth from its tires.",
    video_url: "https://storage.googleapis.com/falserverless/example_inputs/krea_wan_14b_v2v_input.mp4"
  },
  webhookUrl: "https://optional.webhook.url/for/results",
});

Fetch request status#

You can fetch the status of a request to check if it is completed or still in progress.

import { fal } from "@fal-ai/client";

const status = await fal.queue.status("fal-ai/krea-wan-14b/video-to-video", {
  requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b",
  logs: true,
});

Get the result#

Once the request is completed, you can fetch the result. See the Output Schema for the expected result format.

import { fal } from "@fal-ai/client";

const result = await fal.queue.result("fal-ai/krea-wan-14b/video-to-video", {
  requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b"
});
console.log(result.data);
console.log(result.requestId);

4. Files#

Some attributes in the API accept file URLs as input. Whenever that's the case you can pass your own URL or a Base64 data URI.

Data URI (base64)#

You can pass a Base64 data URI as a file input. The API will handle the file decoding for you. Keep in mind that for large files, this alternative although convenient can impact the request performance.

Hosted files (URL)#

You can also pass your own URLs as long as they are publicly accessible. Be aware that some hosts might block cross-site requests, rate-limit, or consider the request as a bot.

Uploading files#

We provide a convenient file storage that allows you to upload files and use them in your requests. You can upload files using the client API and use the returned URL in your requests.

import { fal } from "@fal-ai/client";

const file = new File(["Hello, World!"], "hello.txt", { type: "text/plain" });
const url = await fal.storage.upload(file);

Read more about file handling in our file upload guide.

5. Schema#

Input#

prompt string* required

Prompt for the video-to-video generation.

strength float

Denoising strength for the video-to-video generation. 0.0 preserves the original, 1.0 completely remakes the video. Default value: 0.85

enable_prompt_expansion boolean

Whether to enable prompt expansion. This will use a large language model to expand the prompt with additional details while maintaining the original meaning.

video_url string* required

URL of the input video. Currently, only outputs of 16:9 aspect ratio and 480p resolution are supported. Video duration should be less than 1000 frames at 16fps, and output frames will be 6 plus a multiple of 12, for example 18, 30, 42, etc.

seed integer

Seed for the video-to-video generation.

{
  "prompt": "A powerful, matte black jeep, its robust frame contrasting with the lush green surroundings, navigates a winding jungle road, kicking up small clouds of dust and loose earth from its tires.",
  "strength": 0.85,
  "enable_prompt_expansion": true,
  "video_url": "https://storage.googleapis.com/falserverless/example_inputs/krea_wan_14b_v2v_input.mp4"
}

Output#

video File* required

The generated video file.

{
  "video": {
    "url": "https://storage.googleapis.com/falserverless/example_outputs/krea_wan_14b_v2v_output.mp4"
  }
}

Other types#

Body_upload_video_upload_video_post#

file string* required

File#

url string* required

The URL where the file can be downloaded from.

content_type string

The mime type of the file.

file_name string

The name of the file. It will be auto-generated if not provided.

file_size integer

The size of the file in bytes.