Image to Video endpoint for Seedance 1.0 Pro Fast, a next-generation video model designed to deliver maximum performance at minimal cost

fal-ai/bytedance/seedance/v1/pro/fast/image-to-video

Image to Video endpoint for Seedance 1.0 Pro Fast, a next-generation video model designed to deliver maximum performance at minimal cost

Inference

Commercial use

Partner

Schema

Playground API

SandboxOpen in Sandbox

fal-ai/bytedance/seedance/v1/pro/fast/image-to-video

Schema

SandboxOpen in Sandbox

Image to Video endpoint for Seedance 1.0 Pro Fast, a next-generation video model designed to deliver maximum performance at minimal cost

fal-ai/bytedance/seedance/v1/pro/fast/image-to-video

Image to Video endpoint for Seedance 1.0 Pro Fast, a next-generation video model designed to deliver maximum performance at minimal cost

Inference

Commercial use

Partner

Schema

Playground API

SandboxOpen in Sandbox

About

Generate videos from an image and text quickly using Bytedance's Seedance 1.0 Pro Fast model.

This endpoint allows you to provide a starting image frame along with a text prompt to generate a video. The model will animate the image based on the text description. You can optionally keep the original aspect ratio of the input image.

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

Migrate to @fal-ai/client

The @fal-ai/serverless-client package has been deprecated in favor of @fal-ai/client. Install the new package and update your imports — see client setup.

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/bytedance/seedance/v1/pro/fast/image-to-video", {
  input: {
    prompt: "Bathed in a stark spotlight, a lone ballet dancer takes center stage. Her movements, precise and graceful, tell a story of passion and dedication against the velvet darkness. The scene evokes a sense of intimacy, highlighting the raw emotion and artistry of her performance.",
    image_url: "https://storage.googleapis.com/falserverless/example_inputs/seedance_fast_i2v_input.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);

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 an environment where you cannot set environment variables, you can configure the API key manually on the client.

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

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

Protect your API Key

When running code on the client-side (e.g. in a browser, mobile app or GUI applications), make sure to not expose your FAL_KEY. Instead, use a server-side proxy to make requests to the API. For more information, check out our server-side integration guide.

3. Queue#

Long-running requests

For long-running requests, such as training jobs or models with slower inference times, it is recommended to check the Queue status and rely on Webhooks instead of blocking while waiting for the result.

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/bytedance/seedance/v1/pro/fast/image-to-video", {
  input: {
    prompt: "Bathed in a stark spotlight, a lone ballet dancer takes center stage. Her movements, precise and graceful, tell a story of passion and dedication against the velvet darkness. The scene evokes a sense of intimacy, highlighting the raw emotion and artistry of her performance.",
    image_url: "https://storage.googleapis.com/falserverless/example_inputs/seedance_fast_i2v_input.png"
  },
  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/bytedance/seedance/v1/pro/fast/image-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/bytedance/seedance/v1/pro/fast/image-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);

Auto uploads

The client will auto-upload the file for you if you pass a binary object (e.g. File, Data).

Read more about file handling in our file upload guide.

5. Schema#

Input#

prompt string* required

The text prompt used to generate the video

aspect_ratio AspectRatioEnum

The aspect ratio of the generated video Default value: "auto"

Possible enum values: 21:9, 16:9, 4:3, 1:1, 3:4, 9:16, auto

resolution ResolutionEnum

Video resolution - 480p for faster generation, 720p for balance, 1080p for higher quality Default value: "1080p"

Possible enum values: 480p, 720p, 1080p

duration DurationEnum

Duration of the video in seconds Default value: "5"

Possible enum values: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

camera_fixed boolean

Whether to fix the camera position

seed integer

Random seed to control video generation. Use -1 for random.

enable_safety_checker boolean

If set to true, the safety checker will be enabled. Disabling it requires account authorization; unauthorized requests are always checked. Default value: true

num_frames integer

The number of frames to generate. If provided, will override duration.

image_url string* required

The URL of the image used to generate video

{
  "prompt": "Bathed in a stark spotlight, a lone ballet dancer takes center stage. Her movements, precise and graceful, tell a story of passion and dedication against the velvet darkness. The scene evokes a sense of intimacy, highlighting the raw emotion and artistry of her performance.",
  "aspect_ratio": "auto",
  "resolution": "1080p",
  "duration": "5",
  "enable_safety_checker": true,
  "image_url": "https://storage.googleapis.com/falserverless/example_inputs/seedance_fast_i2v_input.png"
}

Output#

video File* required

Generated video file

seed integer* required

Seed used for generation

{
  "video": {
    "url": "https://storage.googleapis.com/falserverless/example_inputs/seedance_fast_i2v_output.mp4"
  },
  "seed": 42
}

Other types#

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.

Related Models

About

Generate videos from an image and text quickly using Bytedance's Seedance 1.0 Pro Fast model.

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

Migrate to @fal-ai/client

The @fal-ai/serverless-client package has been deprecated in favor of @fal-ai/client. Install the new package and update your imports — see client setup.

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/bytedance/seedance/v1/pro/fast/image-to-video", {
  input: {
    prompt: "Bathed in a stark spotlight, a lone ballet dancer takes center stage. Her movements, precise and graceful, tell a story of passion and dedication against the velvet darkness. The scene evokes a sense of intimacy, highlighting the raw emotion and artistry of her performance.",
    image_url: "https://storage.googleapis.com/falserverless/example_inputs/seedance_fast_i2v_input.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);

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 an environment where you cannot set environment variables, you can configure the API key manually on the client.

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

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

Protect your API Key

3. Queue#

Long-running requests

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/bytedance/seedance/v1/pro/fast/image-to-video", {
  input: {
    prompt: "Bathed in a stark spotlight, a lone ballet dancer takes center stage. Her movements, precise and graceful, tell a story of passion and dedication against the velvet darkness. The scene evokes a sense of intimacy, highlighting the raw emotion and artistry of her performance.",
    image_url: "https://storage.googleapis.com/falserverless/example_inputs/seedance_fast_i2v_input.png"
  },
  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/bytedance/seedance/v1/pro/fast/image-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/bytedance/seedance/v1/pro/fast/image-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)#

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);

Auto uploads

The client will auto-upload the file for you if you pass a binary object (e.g. File, Data).

Read more about file handling in our file upload guide.

5. Schema#

Input#

prompt string* required

The text prompt used to generate the video

aspect_ratio AspectRatioEnum

The aspect ratio of the generated video Default value: "auto"

Possible enum values: 21:9, 16:9, 4:3, 1:1, 3:4, 9:16, auto

resolution ResolutionEnum

Video resolution - 480p for faster generation, 720p for balance, 1080p for higher quality Default value: "1080p"

Possible enum values: 480p, 720p, 1080p

duration DurationEnum

Duration of the video in seconds Default value: "5"

Possible enum values: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

camera_fixed boolean

Whether to fix the camera position

seed integer

Random seed to control video generation. Use -1 for random.

enable_safety_checker boolean

If set to true, the safety checker will be enabled. Disabling it requires account authorization; unauthorized requests are always checked. Default value: true

num_frames integer

The number of frames to generate. If provided, will override duration.

image_url string* required

The URL of the image used to generate video

{
  "prompt": "Bathed in a stark spotlight, a lone ballet dancer takes center stage. Her movements, precise and graceful, tell a story of passion and dedication against the velvet darkness. The scene evokes a sense of intimacy, highlighting the raw emotion and artistry of her performance.",
  "aspect_ratio": "auto",
  "resolution": "1080p",
  "duration": "5",
  "enable_safety_checker": true,
  "image_url": "https://storage.googleapis.com/falserverless/example_inputs/seedance_fast_i2v_input.png"
}

Output#

video File* required

Generated video file

seed integer* required

Seed used for generation

{
  "video": {
    "url": "https://storage.googleapis.com/falserverless/example_inputs/seedance_fast_i2v_output.mp4"
  },
  "seed": 42
}

Other types#

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.

Related Models

Bytedance Seedance V1 Pro Fast Image to Video API Docs | fal

fal-ai/bytedance/seedance/v1/pro/fast/image-to-video

Table of contents

Table of contents

fal-ai/bytedance/seedance/v1/pro/fast/image-to-video

About

1. Calling the API#

Install the client#

Migrate to @fal-ai/client

Setup your API Key#

Submit a request#

2. Authentication#

API Key#

Protect your API Key

3. Queue#

Long-running requests

Submit a request#

Fetch request status#

Get the result#

4. Files#

Data URI (base64)#

Hosted files (URL)#

Uploading files#

Auto uploads

5. Schema#

Input#

Output#

Other types#

File#

Related Models

Table of contents

About

1. Calling the API#

Install the client#

Migrate to @fal-ai/client

Setup your API Key#

Submit a request#

2. Authentication#

API Key#

Protect your API Key

3. Queue#

Long-running requests

Submit a request#

Fetch request status#

Get the result#

4. Files#

Data URI (base64)#

Hosted files (URL)#

Uploading files#

Auto uploads

5. Schema#

Input#

Output#

Other types#

File#

Related Models