# Alibaba | Wan 2.7 | Image to Video

Wan 2.7 Image-to-Video generates high-quality videos from a single image with optional last-frame control, offering guided motion, audio synchronization, and intelligent prompt enhancement.

## API Information

- **Model Slug:** alibaba-wan-2-7-image-to-video
- **Branded URL:** https://www.eachlabs.ai/alibaba/wan-2-7/alibaba-wan-2-7-image-to-video
- **Provider:** Alibaba
- **Category:** Image to Video
- **Output Type:** video
- **Status:** active
- **Base Cost:** $0.10–$0.15 per second, depending on resolution
- **Estimated Processing Time:** 80 seconds
- **Interactive Demo:** https://www.eachlabs.ai/ai-models/alibaba-wan-2-7-image-to-video

## Pricing

- **Charge Type:** dynamic
- **Estimate:** $0.10–$0.15 per second, depending on resolution
- **Pricing Details:** 720P: $0.1
- **Pricing Details:** default: $0.15

## Input Schema

| Parameter | Type | Required | Default | Constraints | Description |
|-----------|------|----------|---------|-------------|-------------|
| prompt | string | No | - | - | Text description to guide video generation. Supports Chinese and English. Max 5,000 characters. Optional but recommended for better results. |
| first_frame | string | No | - | - | URL of the image to use as the first frame. Supported formats: JPEG, JPG, PNG (no alpha), BMP, WEBP. Resolution: 240-8000px per side. Aspect ratio: 1:8 to 8:1. Max 20 MB. |
| last_frame | string | No | - | - | URL of the image to use as the last frame (optional). Enables first-and-last-frame generation for controlled motion. Same format constraints as first frame. |
| first_clip | string | No | - | - | URL of a video to continue from (optional). Enables video continuation mode — generates new frames extending the input clip. MP4/MOV, 2-10s, 240-4096px, max 100 MB. When provided, first_frame is ignored. |
| driving_audio | string | No | - | - | URL of audio for audio-visual synchronization (optional). WAV/MP3, 2-30s, max 15 MB. If longer than video duration, truncated. If shorter, silent tail added. If omitted, model auto-generates audio. |
| negative_prompt | string | No | - | - | Describe what to avoid in the generated video. Max 500 characters. |
| resolution | string | No | 1080P | 720P, 1080P | Output video resolution. 720P: lower cost, faster. 1080P: higher quality (default). Aspect ratio auto-matched from input. |
| duration | integer | No | 5 | 2–15 | Video duration in seconds. Range: 2-15. Each second is billed separately. Default: 5. |
| prompt_extend | boolean | No | true | - | Intelligent prompt rewriting for better quality. Improves results for short prompts but increases latency. Default: true. |
| seed | integer | No | - | 1–2147483647 | Seed for reproducibility. Same seed produces similar (not identical) results. Random if omitted. |

## Example Request

```bash
curl -X POST https://api.eachlabs.ai/v1/prediction/ \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "alibaba-wan-2-7-image-to-video",
  "input": {}
}'
```

## Output Schema

Response returned by `GET /v1/prediction/{id}` when the job completes:

```json
{
  "status": "success",
  "predictionID": "string",
  "output": "string (URL of generated video)",
  "metrics": {
    "predict_time": "number (seconds)"
  }
}
```

## Polling

```bash
curl https://api.eachlabs.ai/v1/prediction/{PREDICTION_ID} \
  -H "Authorization: Bearer YOUR_API_KEY"
```

| Status | Meaning |
|--------|---------|
| `processing` | Still running — poll again |
| `success` | Done — read `output` |
| `error` | Failed — read `message` / `details` |

## Webhook (alternative to polling)

Pass `"webhook_url": "https://your.host/path"` in the create request. Eachlabs POSTs this payload when the job ends:

```json
{
  "exec_id": "prediction-uuid",
  "status": "succeeded",
  "output": "https://...",
  "error": ""
}
```

`status` is `"succeeded"` or `"failed"`. `exec_id` equals the `predictionID` from create. Return 2xx within 30 seconds.

## Errors

Error body: `{ "status": "error", "message": "...", "details": "..." }`

| Code | Meaning |
|------|---------|
| `400` | Invalid input |
| `401` | Missing / invalid `Authorization` bearer token |
| `404` | Unknown model or prediction id |
| `429` | Rate limit — 100 creates / min, 10 concurrent per key |
| `5xx` | Retry with backoff |

## Overview

Alibaba | Wan 2.7 | Image to Video transforms a single static image into dynamic, high-quality video clips, solving the challenge of adding realistic motion and audio to visuals without complex editing tools. Developed by Alibaba Tongyi Lab as part of the advanced Wan 2.7 family, this model stands out with its support for guided motion control, including first/last frame options, and embedded audio synchronization for cinematic results. Users provide an input image and optional prompts to generate videos up to 15-30 seconds at 1080p or higher resolutions, making it ideal for creators seeking professional-grade output directly from each::labs (eachlabs.ai). The Alibaba | Wan 2.7 | Image to Video API enables seamless integration for developers building multimodal applications.

## Usage Notes

- API Base URL: `https://api.eachlabs.ai/v1`
- Authentication: send `Authorization: Bearer YOUR_API_KEY`. Generate a key from the Eachlabs dashboard at https://www.eachlabs.ai/dashboard/api-keys.
- File-typed parameters (`*_url`, `image_url`, `video_url`, `audio_url`, etc.) accept publicly-reachable HTTPS URLs only. Upload your asset first (GCS / S3 / your CDN) and pass the resulting URL. Data-URIs and localhost URLs are rejected.
- For structured parameters (arrays / objects) send real JSON values, not stringified payloads.
- Monetary values are reported in USD; per-token / per-megapixel rates may be billed in micro-cents internally.
- Prefer `webhook_url` over polling for long-running predictions — see the Webhook Callback section.