---
title: "happy-horse-1-text-to-video-1080p (best)"
method: POST
path: "/api/v1/happy-horse-1-text-to-video-1080p"
tags: ["Video: Text-to-Video"]
---

# happy-horse-1-text-to-video-1080p (best)

`POST /api/v1/happy-horse-1-text-to-video-1080p`

## Request

- Base URL: `https://api.muapi.ai`
- URL: `https://api.muapi.ai/api/v1/happy-horse-1-text-to-video-1080p`
- Auth: one of:
  - API key in header `x-api-key`
  - OAuth 2 (client credentials, token URL `https://api.muapi.ai/oauth/token`)

Generate 1080p videos from text using HappyHorse 1.0 (Alibaba's open-source 15B-param unified Transformer; #1 on Artificial Analysis Video Arena at release). Native joint audio+video generation in a single forward pass — video frames and synchronized dialogue/ambient sound/Foley produced together, not dubbed. Multilingual lip-sync across 7 languages (EN, ZH, JA, KO, DE, FR, Cantonese). ~38s typical generation. Input: text prompt. Output: 1080p video with synced audio. Use for: cinematic generation with native sound, multilingual talking-head video, narrative shots where dialogue must lip-sync, premium video quality.

## 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

- HappyHorse1T2VRequest
  - `prompt` string, required: Text prompt describing the video.
  - `webhook_url` string, uri, nullable
  - `aspect_ratio` '16:9' | '9:16' | '1:1' | '4:3' | '3:4'
  - `duration` integer: Video duration in seconds (3–15).
  - `resolution` '720p' | '1080p': Output resolution. Price scales with resolution — see the model's pricing table.

## 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)