# Alibaba Happy Horse Video Edit API

> Happy Horse Video Edit by Alibaba - AI-powered video editing and transformation. Apply style transfer, motion control, lip-sync, and visual effects to existing videos with natural language instructions.

Source: https://www.sandbase.ai/models/alibaba/happy-horse/video-edit
API reference: https://www.sandbase.ai/models/alibaba/happy-horse/video-edit/docs

## Facts

- Provider: Alibaba
- Type: Video model
- Model ID: `alibaba/happy-horse/video-edit`
- Price: From $1.40 per run
- Capabilities: video to video
- Billing: pay per use from one SandBase balance; no provider account or subscription needed

## Call it

- Unified Run API: `POST https://api.sandbase.ai/v1/run`

```bash
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "alibaba/happy-horse/video-edit",
  "video": "https://static.sandbase.ai/examples/alibaba/happy-horse/video-edit/input_video_0.mp4",
  "prompt": "Recolor the sky to a deep purple sunset.",
  "resolution": "720p",
  "audio_setting": "auto"
}'
```

The response returns a run id; poll `GET https://api.sandbase.ai/v1/run/{id}` until the status is `completed` or `failed`.

## FAQ

### How do I call Alibaba Happy Horse Video Edit through SandBase?

Create a SandBase API key, then send requests with the model ID "alibaba/happy-horse/video-edit" to Unified Run API (/v1/run) at https://api.sandbase.ai. The request examples on this page show the exact payload.

### Do I need a separate Alibaba account?

No. One SandBase API key and balance gives you access to Alibaba Happy Horse Video Edit and the other models in the catalog; you do not need to sign up with Alibaba separately.

## README

### Happy Horse Video Edit

Edit an existing clip with Happy Horse: restyle it, change objects or wardrobe, or rework the scene with an instruction. Optional reference images show the target look; the source motion and length are kept.

#### Fields

| Field | Type | Default | Notes |
|---|---|---|---|
| `prompt` | string, required | — | Text instruction. |
| `video` | video URL, required | — | Source clip, Video 1 in the prompt. |
| `resolution` | `720p` / `1080p` | `720p` | Sets the per-second rate. |
| `seed` | integer | random | Fix it to compare prompt changes. |
| `reference_image_urls` | image URL[] | — | Optional reference images for the new look. |
| `audio_setting` | `auto` / `origin` | `auto` | `auto` regenerates audio to match the edit; `origin` keeps the source track. |

#### Billing

Alibaba bills the source and the edited output, which are the same length, so each source second bills twice: $0.28 at 720p and $0.48 at 1080p. The quote before submission assumes a 5-second source; the final charge uses the measured length.

| Source clip | 720p | 1080p |
|---|---|---|
| 3s | $0.84 | $1.44 |
| 5s | $1.40 | $2.40 |
| 10s | $2.80 | $4.80 |
| 15s | $4.20 | $7.20 |

Failed runs are not charged.

#### Prompting

- Lead with the change and say what must stay: “make it a watercolor animation; keep her face and the camera move”.
- Draft at 720p; edits bill twice the source length.

#### Limits

- Output length and framing follow the source video.

#### Also on SandBase

Other Happy Horse endpoints: `alibaba/happy-horse/text-to-video`, `alibaba/happy-horse/image-to-video`, `alibaba/happy-horse/reference-to-video`, `alibaba/wan/2.7/video-edit` (Wan alternative, bills output only).