> ## Documentation Index
> Fetch the complete documentation index at: https://docs.myrouter.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Seedance V1 Pro Text-to-Video

Seedance V1 Pro is an AI video model designed to generate coherent multi-shot videos with smooth motion and precise adherence to detailed prompts. It supports resolutions of 480p, 720p, and 1080p.

## Request Headers

<ParamField header="Content-Type" type="string" required={true}>
  Enum: `application/json`
</ParamField>

<ParamField header="Authorization" type="string" required={true}>
  Bearer authentication format: Bearer \{\{API Key}}.
</ParamField>

## Request Body

<ParamField body="prompt" type="string" required={true}>
  Text prompt for video generation; positive text prompt; supports Chinese and English, recommended not to exceed 500 characters.
</ParamField>

<ParamField body="resolution" type="string" required={true}>
  Video quality. Acceptable values: `480p`, `720p`, `1080p`
</ParamField>

<ParamField body="aspect_ratio" type="string" default="16:9">
  Aspect ratio of the generated video.
  Acceptable values: `21:9`, `16:9`, `4:3`, `1:1`, `3:4`, `9:16`
</ParamField>

<ParamField body="duration" type="integer" required={true} default={5}>
  Specifies the length of the generated video in seconds. Available options: `5`, `10`
</ParamField>

<ParamField body="camera_fixed" type="boolean" default={false}>
  Determines whether the camera position should remain fixed.
</ParamField>

<ParamField body="seed" type="integer" default={-1} minimum={-1} maximum={2147483647}>
  Random seed for generation. -1 means a random seed will be used.
</ParamField>

## Response

<ResponseField name="task_id" type="string" required={true}>
  The task\_id of the async task. Use the task\_id to call the [Get Async Task Result API](/docs/models/reference-get-async-task-result) to retrieve the generated result.
</ResponseField>