---
title: "flux-3-video-extend-draft (fast)"
method: POST
path: "/api/v1/flux-3-video-extend-draft"
tags: ["Video: Edit & Effects"]
---

# flux-3-video-extend-draft (fast)

`POST /api/v1/flux-3-video-extend-draft`

## Request

- Base URL: `https://api.muapi.ai`
- URL: `https://api.muapi.ai/api/v1/flux-3-video-extend-draft`
- Auth: one of:
  - API key in header `x-api-key`
  - OAuth 2 (client credentials, token URL `https://api.muapi.ai/oauth/token`)

Fast, lower-cost draft video extension using FLUX 3. Input: prompt, video_url, duration, generate_audio. Output: video. Use for: testing continuity and camera movement before a final extension.

## Query parameters

- `webhook` string
- `team_id` integer, nullable

## Headers

- `x-api-key` string
- `x-embed-code` string, nullable
- `x-agent-embed-code` string, nullable
- `x-whitelabel-studio` string, nullable
- `authorization` string, nullable

## Request body

- Flux3VideoExtendDraftRequest
  - `prompt` string, required
  - `video_url` string, uri, required
  - `aspect_ratio` '21:9' | '2:1' | '16:9' | '4:3' | '1:1' | '3:4' | '9:16', nullable
  - `duration` integer
  - `generate_audio` boolean
  - `webhook_url` string, uri, nullable

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/muapi/apis/muapi-api.md) · [All operations](https://skmtc.dev/muapi/apis/muapi-api/llms.txt) · [OpenAPI document](https://skmtc.dev/muapi/apis/muapi-api/revisions/e4b7374381e5?raw)