Wan 2.7 Video Editing

Validation

mkdir -p output/aliyun-wan-videoedit
python -m py_compile skills/ai/video/aliyun-wan-videoedit/scripts/edit_video.py && echo "py_compile_ok" > output/aliyun-wan-videoedit/validate.txt

Pass criteria: command exits 0 and output/aliyun-wan-videoedit/validate.txt is generated.

Output And Evidence

• Save task IDs, polling responses, and final video URLs to output/aliyun-wan-videoedit/.
• Keep at least one end-to-end run log for troubleshooting.

Prerequisites

• Install SDK (recommended in a venv):

python3 -m venv .venv
. .venv/bin/activate
python -m pip install dashscope

• Set DASHSCOPE_API_KEY in your environment, or add dashscope_api_key to ~/.alibabacloud/credentials.

Critical model names

• wan2.7-videoedit — supports style transfer and instruction-based video editing

Capabilities

API endpoint (async only)

POST https://dashscope.aliyuncs.com/api/v1/services/aigc/video-generation/video-synthesis

Required headers:

• Authorization: Bearer $DASHSCOPE_API_KEY
• Content-Type: application/json
• X-DashScope-Async: enable

Singapore endpoint: replace dashscope.aliyuncs.com with dashscope-intl.aliyuncs.com.

Normalized interface

Request

• prompt (string, optional) — up to 5000 characters, describes desired editing
• negative_prompt (string, optional) — up to 500 characters
• media (array, required) — media objects with type and url fields:
  • type: video (required, exactly 1) | reference_image (optional, up to 3)
  • url: public URL (HTTP/HTTPS) or OSS temporary URL
• resolution (string, optional) — 720P or 1080P (default: 1080P)
• ratio (string, optional) — output aspect ratio: 16:9, 9:16, 1:1, 4:3, 3:4. If omitted, follows input video ratio.
• duration (integer, optional) — truncate input video to this length in seconds, range [2, 10]. Default 0 (use input video duration).
• audio_setting (string, optional) — auto (default, AI decides) or origin (keep original audio)
• prompt_extend (boolean, optional) — AI prompt rewriting (default: true)
• watermark (boolean, optional) — add "AI generated" watermark (default: false)
• seed (integer, optional) — range [0, 2147483647]

Media input limits

Video (type=video):

• Formats: mp4, mov
• Duration: 2-10s
• Resolution: [240, 4096] pixels per side
• Aspect ratio: 1:8 to 8:1
• Max size: 100MB

Reference images (type=reference_image):

• Formats: JPEG, JPG, PNG (no transparency), BMP, WEBP
• Resolution: [240, 8000] pixels per side
• Aspect ratio: 1:8 to 8:1
• Max size: 20MB
• Maximum 3 reference images

Resolution output table

Response (task creation)

• output.task_id (string) — use for polling, valid 24 hours
• output.task_status (string) — PENDING | RUNNING | SUCCEEDED | FAILED | CANCELED
• request_id (string)

Response (task result)

• output.video_url (string) — edited video URL
• usage.video_count (integer)
• usage.video_duration (integer) — duration in seconds

Quick start (Python + HTTP)

import os
import json
import time
import requests

API_KEY = os.getenv("DASHSCOPE_API_KEY")
BASE_URL = "https://dashscope.aliyuncs.com/api/v1"

def create_videoedit_task(req: dict) -> str:
    """Create a video editing task and return task_id."""
    payload = {
        "model": "wan2.7-videoedit",
        "input": {
            "prompt": req.get("prompt", ""),
            "media": req["media"],
        },
        "parameters": {
            "resolution": req.get("resolution", "1080P"),
            "prompt_extend": req.get("prompt_extend", True),
            "watermark": req.get("watermark", False),
        },
    }
    if req.get("negative_prompt"):
        payload["input"]["negative_prompt"] = req["negative_prompt"]
    if req.get("ratio"):
        payload["parameters"]["ratio"] = req["ratio"]
    if req.get("duration"):
        payload["parameters"]["duration"] = req["duration"]
    if req.get("audio_setting"):
        payload["parameters"]["audio_setting"] = req["audio_setting"]
    if req.get("seed") is not None:
        payload["parameters"]["seed"] = req["seed"]

    resp = requests.post(
        f"{BASE_URL}/services/aigc/video-generation/video-synthesis",
        headers={
            "Authorization": f"Bearer {API_KEY}",
            "Content-Type": "application/json",
            "X-DashScope-Async": "enable",
        },
        json=payload,
    )
    resp.raise_for_status()
    data = resp.json()
    return data["output"]["task_id"]


def poll_task(task_id: str, interval: int = 15) -> dict:
    """Poll until task completes. Returns final response."""
    while True:
        resp = requests.get(
            f"{BASE_URL}/tasks/{task_id}",
            headers={"Authorization": f"Bearer {API_KEY}"},
        )
        resp.raise_for_status()
        data = resp.json()
        status = data["output"]["task_status"]
        if status in ("SUCCEEDED", "FAILED", "CANCELED"):
            return data
        time.sleep(interval)

Usage examples

# Style transfer — convert to clay style
media = [{"type": "video", "url": "https://example.com/input.mp4"}]
task_id = create_videoedit_task({
    "prompt": "将整个画面转换为黏土风格",
    "media": media,
    "resolution": "720P",
})

# Instruction editing with reference image
media = [
    {"type": "video", "url": "https://example.com/input.mp4"},
    {"type": "reference_image", "url": "https://example.com/hat.jpg"},
]
task_id = create_videoedit_task({
    "prompt": "为人物换上酷闪的衣服，再戴参考图里的帽子",
    "media": media,
    "audio_setting": "origin",
})

Error handling

Output location

• Default output: output/aliyun-wan-videoedit/videos/
• Override base dir with OUTPUT_DIR.

Anti-patterns

• Do not use model names other than wan2.7-videoedit.
• Do not call this API synchronously — async header is required.
• Do not pass more than 1 video or more than 3 reference images.
• Video URLs expire after 24 hours; download and persist immediately.
• Do not use this API for video generation — use aliyun-wan-i2v instead.

Workflow

1. Confirm user intent: style transfer or instruction-based editing.
2. Prepare media array with video (required) and optional reference images.
3. Create async task and poll for results.
4. Download and save edited video before URL expiration.

References

• See references/api_reference.md for full HTTP API details.
• See references/sources.md for source links.