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Bytedance Text to Video

fal-ai/bytedance/seedance/v1/pro/fast/text-to-video
Text 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
PlaygroundAPI

About

Generate videos from text quickly using Bytedance's Seedance 1.0 Fast model.

Seedance 1.0 Pro Fast is a fast, efficient and high quality text-to-video model that generates high-quality videos from text prompts. It supports multiple aspect ratios, resolutions, and durations for versatile video generation.

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/bytedance/seedance/v1/pro/fast/text-to-video", {
  input: {
    prompt: "Inside a quiet dojo, a martial artist moves with precision and grace. The performance highlights the beauty and discipline inherent in the ancient practice. Each form unfolds clearly, a testament to dedication and skill."
  },
  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/bytedance/seedance/v1/pro/fast/text-to-video", {
  input: {
    prompt: "Inside a quiet dojo, a martial artist moves with precision and grace. The performance highlights the beauty and discipline inherent in the ancient practice. Each form unfolds clearly, a testament to dedication and skill."
  },
  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/text-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/text-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

The text prompt used to generate the video

aspect_ratio AspectRatioEnum

The aspect ratio of the generated video Default value: "16:9"

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

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: 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. Default value: true

{
  "prompt": "Inside a quiet dojo, a martial artist moves with precision and grace. The performance highlights the beauty and discipline inherent in the ancient practice. Each form unfolds clearly, a testament to dedication and skill.",
  "aspect_ratio": "16:9",
  "resolution": "1080p",
  "duration": "5",
  "enable_safety_checker": true
}

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_t2v_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.

file_data string

File data

Image#

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.

file_data string

File data

width integer

The width of the image in pixels.

height integer

The height of the image in pixels.

ImageSize#

width integer

The width of the generated image. Default value: 512

height integer

The height of the generated image. Default value: 512

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