---
title: "Text to video"
method: POST
path: "/v1/text_to_video"
tags: ["Start generating"]
---

# Text to video

`POST /v1/text_to_video`

This endpoint will start a new task to generate a video from a text prompt.

## Headers

- `X-Runway-Version` '2024-11-06', required

## Request body

- union
  - object
    - `promptText` string, required — A non-empty string up to 1000 characters (measured in UTF-16 code units). This should describe in detail what should appear in the output.
    - `ratio` '1280:720' | '720:1280', required — The resolution of the output video.
    - `duration` integer, required — The number of seconds of duration for the output video. Must be an integer from 2 to 10.
    - `seed` integer — If unspecified, a random number is chosen. Varying the seed integer is a way to get different results for the same other request parameters. Using the same seed integer for an identical request will produce similar results.
    - `contentModeration` object — Settings that affect the behavior of the content moderation system.
      - `publicFigureThreshold` 'auto' | 'low' — When set to `low`, the content moderation system will be less strict about preventing generations that include recognizable public figures.
    - `model` 'gen4.5', required
  - object
    - `promptText` string, required — A non-empty string up to 1000 characters (measured in UTF-16 code units). This should describe in detail what should appear in the output.
    - `ratio` '1280:720' | '720:1280' | '1080:1920' | '1920:1080', required — The resolution of the output video.
    - `audio` boolean — Whether to generate audio for the video. Audio inclusion affects pricing.
    - `negativePrompt` string — Text describing what should not appear in the output video.
    - `duration` 4 | 6 | 8 — The number of seconds of duration for the output video.
    - `model` 'veo3.1', required
  - object
    - `promptText` string, required — A non-empty string up to 1000 characters (measured in UTF-16 code units). This should describe in detail what should appear in the output.
    - `ratio` '1280:720' | '720:1280' | '1080:1920' | '1920:1080', required — The resolution of the output video.
    - `audio` boolean — Whether to generate audio for the video. Audio inclusion affects pricing.
    - `negativePrompt` string — Text describing what should not appear in the output video.
    - `duration` 4 | 6 | 8 — The number of seconds of duration for the output video.
    - `model` 'veo3.1_fast', required
  - object
    - `promptText` string, required — A non-empty string up to 2500 characters (measured in UTF-16 code units). This should describe in detail what should appear in the output.
    - `duration` integer — The number of seconds of duration for the output video.
    - `ratio` '1280:720' | '720:1280' | '960:960' | '1108:832' | '832:1108' | '1920:1080' | '1080:1920' | '1440:1440' | '1662:1248' | '1248:1662' — The resolution of the output video.
    - `model` 'happyhorse_1_0', required
  - object
    - `promptText` string, required — A non-empty text prompt up to 3500 characters describing what should appear in the output.
    - `audio` boolean — Whether to generate audio for the video.
    - `duration` integer — The number of seconds of duration for the output video.
    - `ratio` '992:432' | '864:496' | '752:560' | '640:640' | '560:752' | '496:864' | '1470:630' | '1280:720' | '1112:834' | '960:960' | '834:1112' | '720:1280' | '2206:946' | '1920:1080' | '1664:1248' | '1440:1440' | '1248:1664' | '1080:1920' | '3840:1646' | '3840:2160' | '3840:2880' | '3840:3840' | '2880:3840' | '2160:3840' — The resolution of the output video.
    - `references` object[] — An optional array of image references (up to 9). See [our docs](/assets/inputs#images) on image inputs for more information.
      - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information.
        - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:image/png;base64,...`, up to 5MB) containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information.
        - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information.
        - string — A data URI containing encoded media.
    - `referenceVideos` object[] — An optional array of video references. The combined duration across all video references must not exceed 15 seconds. See [our docs](/assets/inputs#videos) on video inputs for more information.
      - `type` 'video', required
      - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information.
        - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:video/mp4;base64,...`, up to 16MB) containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information.
        - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information.
        - string — A data URI containing encoded media.
    - `referenceAudio` object[] — An optional array of audio references. Audio references require a text prompt, and the total combined duration must not exceed 15 seconds.
      - `type` 'audio', required
      - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information.
        - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:audio/mp3;base64,...`, up to 16MB) containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information.
        - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information.
        - string — A data URI containing encoded media.
    - `model` 'seedance2', required
  - object
    - `promptText` string, required — A non-empty text prompt up to 3500 characters describing what should appear in the output.
    - `audio` boolean — Whether to generate audio for the video.
    - `duration` integer — The number of seconds of duration for the output video.
    - `ratio` '992:432' | '864:496' | '752:560' | '640:640' | '560:752' | '496:864' | '1470:630' | '1280:720' | '1112:834' | '960:960' | '834:1112' | '720:1280' — The resolution of the output video. Seedance 2.0 Fast supports 480p and 720p only.
    - `references` object[] — An optional array of image references (up to 9). See [our docs](/assets/inputs#images) on image inputs for more information.
      - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information.
        - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:image/png;base64,...`, up to 5MB) containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information.
        - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information.
        - string — A data URI containing encoded media.
    - `referenceVideos` object[] — An optional array of video references. The combined duration across all video references must not exceed 15 seconds. See [our docs](/assets/inputs#videos) on video inputs for more information.
      - `type` 'video', required
      - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information.
        - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:video/mp4;base64,...`, up to 16MB) containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information.
        - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information.
        - string — A data URI containing encoded media.
    - `referenceAudio` object[] — An optional array of audio references. Audio references require a text prompt, and the total combined duration must not exceed 15 seconds.
      - `type` 'audio', required
      - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information.
        - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:audio/mp3;base64,...`, up to 16MB) containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information.
        - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information.
        - string — A data URI containing encoded media.
    - `model` 'seedance2_fast', required
  - object
    - `promptText` string, required — A non-empty text prompt up to 3500 characters describing what should appear in the output.
    - `audio` boolean — Whether to generate audio for the video.
    - `duration` integer — The number of seconds of duration for the output video.
    - `ratio` '992:432' | '864:496' | '752:560' | '640:640' | '560:752' | '496:864' | '1470:630' | '1280:720' | '1112:834' | '960:960' | '834:1112' | '720:1280' — The resolution of the output video. Seedance 2.0 Mini supports 480p and 720p only.
    - `references` object[] — An optional array of image references (up to 9). See [our docs](/assets/inputs#images) on image inputs for more information.
      - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information.
        - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:image/png;base64,...`, up to 5MB) containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information.
        - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information.
        - string — A data URI containing encoded media.
    - `referenceVideos` object[] — An optional array of video references. The combined duration across all video references must not exceed 15 seconds. See [our docs](/assets/inputs#videos) on video inputs for more information.
      - `type` 'video', required
      - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information.
        - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:video/mp4;base64,...`, up to 16MB) containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information.
        - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information.
        - string — A data URI containing encoded media.
    - `referenceAudio` object[] — An optional array of audio references. Audio references require a text prompt, and the total combined duration must not exceed 15 seconds.
      - `type` 'audio', required
      - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information.
        - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:audio/mp3;base64,...`, up to 16MB) containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information.
        - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information.
        - string — A data URI containing encoded media.
    - `model` 'seedance2_mini', required
  - object
    - `promptText` string, required — A non-empty text prompt describing the video to generate.
    - `ratio` '1280:720' | '720:1280' — The aspect ratio of the output video: `1280:720` (landscape) or `720:1280` (portrait).
    - `duration` integer — The duration of the output video in seconds, as a whole number from 3 to 10.
    - `model` 'gemini_omni_flash', required
  - object
    - `promptText` string, required — A non-empty string up to 1000 characters (measured in UTF-16 code units). This should describe in detail what should appear in the output.
    - `duration` 8, required — The number of seconds of duration for the output video.
    - `ratio` '1280:720' | '720:1280' | '1080:1920' | '1920:1080', required — The resolution of the output video.
    - `negativePrompt` string — Text describing what should not appear in the output video.
    - `model` 'veo3', required

## Response `200`

The task that was created.

- object
  - `id` string, uuid, required — The ID of the task that was created. Use this to retrieve the task later.

## Other responses

- `429` — You have exceeded the rate limit for this endpoint.

---

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