Aliyun Vidu Video

Vidu Video Generation

Validation

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

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

Output And Evidence

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

Prerequisites

• Set DASHSCOPE_API_KEY in your environment (Beijing region key required).
• Region: China Mainland (Beijing) only. Model, Endpoint URL, and API Key must belong to the same region.
• Enable Vidu models in the Alibaba Cloud Model Studio console before first use.

Critical model names

Text-to-video

• vidu/viduq3-pro_text2video
• vidu/viduq3-turbo_text2video
• vidu/viduq2_text2video

Image-to-video (first frame)

• vidu/viduq3-pro_img2video
• vidu/viduq3-turbo_img2video
• vidu/viduq2-pro_img2video
• vidu/viduq2-turbo_img2video

Keyframe-to-video (first+last frame)

• vidu/viduq3-pro_start-end2video
• vidu/viduq3-turbo_start-end2video
• vidu/viduq2-pro_start-end2video
• vidu/viduq2-turbo_start-end2video

Reference-to-video

• vidu/viduq2_reference2video
• vidu/viduq2-pro_reference2video

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

Normalized interface

Request

• model (string, required) -- one of the model names listed above
• input.prompt (string) -- up to 5000 characters, describes desired video content
  • Required for text-to-video, keyframe, and reference modes
  • Optional for image-to-video
• input.media (array) -- media objects with type and url fields (not used for text-to-video)
  • type: image or video
  • url: public URL (HTTP/HTTPS)
• parameters.resolution (string, optional) -- 540P, 720P (default), or 1080P
• parameters.size (string, optional) -- pixel dimensions width*height (e.g., 1280*720). Values depend on resolution tier. For text-to-video and reference-to-video, explicit size values are supported.
• parameters.duration (integer, optional) -- video length in seconds
  • Q3 models: [1, 16], default 5
  • Q2 models: [1, 10], default 5
• parameters.audio (boolean, optional) -- generate audio track (Q3 models only, default false)
• parameters.watermark (boolean, optional) -- add "AI generated" watermark (default false)
• parameters.seed (integer, optional) -- range [0, 2147483647]

Size values by resolution tier (text-to-video)

Size values by resolution tier (reference-to-video)

Media input limits

Images (type=image):

• Formats: JPG, PNG, WEBP
• Aspect ratio: 1:4 to 4:1
• Max size: 50MB

Videos (type=video, reference-to-video only):

• Formats: mp4, avi, mov
• Resolution: min 128x128 pixels
• Aspect ratio: 1:4 to 4:1
• Duration: 1-5s
• Max size: 50MB

Response (task creation)

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

Response (task result)

• output.video_url (string) -- generated video URL (MP4, H.264), valid 24 hours
• output.orig_prompt (string) -- original prompt
• usage.duration (integer) -- billable video duration in seconds
• usage.output_video_duration (integer) -- actual output duration
• usage.size (string) -- output resolution
• usage.fps (integer) -- frame rate (24)
• usage.audio (boolean) -- whether audio was generated
• usage.SR (string) -- resolution tier

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_vidu_task(req: dict) -> str:
    """Create a Vidu video generation task and return task_id."""
    payload = {
        "model": req["model"],
        "input": {},
        "parameters": {
            "resolution": req.get("resolution", "720P"),
            "duration": req.get("duration", 5),
        },
    }
    if req.get("prompt"):
        payload["input"]["prompt"] = req["prompt"]
    if req.get("media"):
        payload["input"]["media"] = req["media"]
    if req.get("size"):
        payload["parameters"]["size"] = req["size"]
    if req.get("audio") is not None:
        payload["parameters"]["audio"] = req["audio"]
    if req.get("watermark") is not None:
        payload["parameters"]["watermark"] = req["watermark"]
    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)

Mode-specific examples

# Text-to-video
task_id = create_vidu_task({
    "model": "vidu/viduq3-turbo_text2video",
    "prompt": "A cat running under moonlight",
    "resolution": "540P",
    "size": "960*528",
    "duration": 5,
})

# Image-to-video (first frame)
task_id = create_vidu_task({
    "model": "vidu/viduq3-pro_img2video",
    "prompt": "Camera slowly pans upward",
    "media": [{"type": "image", "url": "https://example.com/image.jpg"}],
    "resolution": "720P",
    "duration": 5,
})

# Keyframe-to-video (first + last frame)
task_id = create_vidu_task({
    "model": "vidu/viduq3-turbo_start-end2video",
    "prompt": "A cat jumps from windowsill to sofa",
    "media": [
        {"type": "image", "url": "https://example.com/first.png"},
        {"type": "image", "url": "https://example.com/last.png"},
    ],
    "resolution": "540P",
    "duration": 5,
})

# Reference-to-video
task_id = create_vidu_task({
    "model": "vidu/viduq2_reference2video",
    "prompt": "Man playing guitar in a cafe",
    "media": [
        {"type": "image", "url": "https://example.com/ref1.jpg"},
        {"type": "image", "url": "https://example.com/ref2.jpg"},
    ],
    "resolution": "720P",
    "size": "1280*720",
    "duration": 5,
})

Error handling

Output location

• Default output: output/aliyun-vidu-video/videos/
• Override base dir with OUTPUT_DIR.

Anti-patterns

• Do not use model names not listed in "Critical model names" above.
• Do not call this API synchronously -- async header is required.
• Do not omit size when using reference-to-video -- it is required for that mode.
• Do not pass audio=true with Q2 models -- only Q3 models support audio generation.
• Video URLs expire after 24 hours; download and persist immediately.
• For image-to-video, supply exactly 1 image. For keyframe, supply exactly 2 images (first, then last).
• For reference-to-video with viduq2_reference2video, only images are accepted (1-7). For viduq2-pro_reference2video, images (1-4) plus optional videos (1-2) are accepted.
• Keyframe mode: first and last frame pixel count ratio must be between 0.8 and 1.25.

Workflow

1. Confirm user intent: text-to-video, image-to-video, keyframe, or reference-to-video.
2. Select the appropriate model name based on capability and quality tier (Q3 pro/turbo or Q2).
3. Prepare input: prompt and/or media array with correct types and valid public URLs.
4. Set resolution, size, and duration parameters.
5. Create async task and poll for results (15s interval recommended).
6. Download and save generated video before URL expiration (24 hours).

References

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