HappyHorse 1.0 Video Edit

HappyHorse 1.0 Video Edit modifies an input video guided by a reference image and a prompt. It uses the async task API — submit a task, then poll until ready.

⚠️ Native format required. Because video-edit needs both a video and a reference image at the same time, the unified flat-field shortcut cannot express it. You must use the native DashScope-style request body with input.media[].

Key capabilities

Video editing — Modify objects, clothing, scenes inside an existing video
Resolution — 720P / 1080P
Watermark control — Optionally disable the bottom-right watermark

⚠️ Output duration is determined by the input video length. The duration parameter may not take effect for video-edit.

Workflow

POST /v1/video/generations  →  task_id   (must use input.media[] format)
GET  /v1/video/generations/{task_id}  →  poll until SUCCESS / FAILURE
Read data.result_url  (valid 24 hours)

Quick example

curl https://www.anyfast.ai/v1/video/generations \
  -H 'Authorization: Bearer YOUR_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "happyhorse-1.0-video-edit",
    "input": {
      "prompt": "Make the character in the video wear the striped sweater from the image",
      "media": [
        {"type": "video", "url": "https://example.com/source.mp4"},
        {"type": "reference_image", "url": "https://example.com/cloth.webp"}
      ]
    },
    "parameters": {
      "resolution": "720P",
      "watermark": false
    }
  }'

import requests

headers = {"Authorization": "Bearer YOUR_API_KEY"}

resp = requests.post(
    "https://www.anyfast.ai/v1/video/generations",
    headers=headers,
    json={
        "model": "happyhorse-1.0-video-edit",
        "input": {
            "prompt": "Make the character in the video wear the striped sweater from the image",
            "media": [
                {"type": "video", "url": "https://example.com/source.mp4"},
                {"type": "reference_image", "url": "https://example.com/cloth.webp"},
            ],
        },
        "parameters": {"resolution": "720P", "watermark": False}
    }
)
task_id = resp.json()["task_id"]

Parameters

Parameter	Type	Required	Description
`model`	string	Yes	Must be `happyhorse-1.0-video-edit`
`input.prompt`	string	Yes	Text description of the edit
`input.media`	array	Yes	Exactly 2 items: one `video` + one `reference_image`
`input.media[].type`	string	Yes	`video` or `reference_image`
`input.media[].url`	string	Yes	Public URL of the video or reference image
`parameters.resolution`	string	No	`720P` / `1080P`. Default: `1080P`
`parameters.watermark`	boolean	No	Default `true`. Set `false` to remove watermark
`parameters.seed`	integer	No	Random seed `[0, 2147483647]`

Billing

Charged by resolution tier × billed duration. If duration is not provided, defaults to 5 seconds. Failed tasks are automatically refunded.

API Reference

Interactive playground for HappyHorse 1.0 Video Edit.

Task Query

Poll task status and retrieve the final video URL.

Getting started

Model Introduction

Resources

HappyHorse 1.0 Video Edit

Key capabilities

Workflow

Quick example

Parameters

Billing

API Reference

Task Query

​Key capabilities

​Workflow

​Quick example

​Parameters

​Billing

API Reference

Task Query

Key capabilities

Workflow

Quick example

Parameters

Billing