> ## 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.

# Vidu Q3 Pro Text-to-Video

This is an async API that only returns the `task_id` of the async task.

<Tip>
  This is an **async** API that only returns 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.
</Tip>

## 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="seed" type="integer">
  Random seed for reproducible results. Set to 0 for random.

  Range: \[0, 2147483647]
</ParamField>

<ParamField body="audio" type="boolean" default={true}>
  Whether to enable audio-video generation (including dialogue and sound effects). Only supported by Q3 models.
</ParamField>

<ParamField body="prompt" type="string" required={true}>
  Text description for video generation, up to 2000 characters.

  Length limit: 0 - 2000
</ParamField>

<ParamField body="wm_url" type="string">
  Watermark image URL.
</ParamField>

<ParamField body="duration" type="integer" default={5}>
  Video duration (seconds). Range: 1-16.

  Range: \[1, 16]
</ParamField>

<ParamField body="off_peak" type="boolean" default={false}>
  Use off-peak mode. Tasks will be processed within 48 hours at a lower cost.
</ParamField>

<ParamField body="watermark" type="boolean" default={false}>
  Whether to add a watermark.
</ParamField>

<ParamField body="resolution" type="string" default="720p">
  Output video resolution.

  Possible values: `540p`, `720p`, `1080p`
</ParamField>

<ParamField body="wm_position" type="integer">
  Watermark position: 1=top-left, 2=top-right, 3=bottom-left, 4=bottom-right.

  Range: \[1, 4]
</ParamField>

<ParamField body="aspect_ratio" type="string" default="16:9">
  Output video aspect ratio.

  Possible values: `16:9`, `9:16`, `4:3`, `3:4`, `1:1`
</ParamField>

## Response

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