Wan 2.6 Video Extend

Wan 2.6 Video Extend is video extension model that seamlessly extends existing videos by generating additional frames. Upload a video clip and describe the continuation — the model generates smooth, coherent footage that naturally extends your original content by 5, 10, or 15 seconds.

Why Choose This?

Seamless extension Generates new frames that naturally continue the motion and style of your original video.
Flexible duration Extend videos by 5, 10, or 15 seconds based on your needs.
Multi-resolution support Output in 720p or 1080p to match your source footage.
Audio support Optional audio input for synchronized video extension.
Prompt-guided generation Describe how the video should continue for precise control over the extension.
Negative prompt support Specify elements to avoid in the extended footage.
Prompt Enhancer Built-in tool to automatically improve your descriptions.

Parameters

Parameter	Required	Description
video	Yes	Source video to extend (URL or upload)
prompt	Yes	Describe how the video should continue
audio	No	Audio file for synchronized extension (URL or upload)
negative_prompt	No	Elements to avoid in the extended video
resolution	No	Output resolution: 720p (default), 1080p
duration	No	Extension length: 5, 10, or 15 seconds (default: 5)
shot_type	No	Shot composition: single (default) or multi
enable_prompt_expansion	No	Enable prompt optimizer (default: disabled)
seed	No	Random seed for reproducibility

How to Use

Upload your video — provide the source video you want to extend.
Write your prompt — describe how the video should continue (motion, action, scene changes).
Add audio (optional) — upload audio for synchronized extension.
Add negative prompt (optional) — specify elements you want to avoid.
Choose resolution — select 720p or 1080p based on your source footage.
Set duration — choose 5, 10, or 15 seconds of extension.
Run — submit and download your extended video.

Pricing

Duration	720p	1080p
5 s	$0.50	$0.75
10 s	$1.00	$1.50
15 s	$1.50	$2.25

Billing Rules

720p rate: $0.50 per 5 seconds (2× base)
1080p rate: $0.75 per 5 seconds (3× base)

Best Use Cases

Content Extension — Extend short clips into longer sequences for storytelling.
Social Media — Transform brief moments into full-length videos for TikTok, Reels, or Shorts.
Film & Production — Extend establishing shots or B-roll footage.
Looping Content — Create extended versions of clips for backgrounds or displays.
Creative Projects — Continue scenes beyond their original capture.

Pro Tips

Use detailed prompts describing how the motion, camera, and scene should continue.
Match the resolution setting to your source video for consistent quality.
Enable prompt expansion for automatically enhanced descriptions.
Use negative_prompt to avoid unwanted elements or style changes in the extension.
For best results, use source videos with clear motion direction that can be naturally continued.
Keep the seed consistent if you want to iterate on the same extension.

Notes

Both video and prompt are required fields.
Extension duration options: 5, 10, or 15 seconds.
Ensure uploaded video URLs are publicly accessible.
1080p resolution costs 1.5× the 720p rate.

Related Models

Wan 2.6 Image-to-Video — Generate video from still images.
Wan 2.6 Image-to-Video Pro — Pro tier with 4K support.
Wan 2.6 Text-to-Video — Generate videos from text prompts.

Wan 2.6 Video Extend API — Quick start

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/alibaba/wan-2.6/video-extend with your input as JSON. The endpoint returns a prediction id; poll the prediction endpoint until status flips to completed, then read the output URL from data.outputs[0]. Examples for Wan 2.6 Video Extend below.

HTTP example

# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/alibaba/wan-2.6/video-extend" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY" \
  -d '{
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "video": "https://example.com/your-input.mp4",
    "audio": "https://example.com/your-audio.mp3",
    "negative_prompt": "blurry, low quality, distorted",
    "resolution": "720p",
    "duration": 5,
    "shot_type": "single",
    "enable_prompt_expansion": false,
    "seed": -1
}'

# Response includes a prediction id. Poll for the result:
curl -X GET "https://api.wavespeed.ai/api/v3/predictions/{request_id}/result" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY"

# When status is "completed", read the output from data.outputs[0].

Node.js example

// npm install wavespeed
const WaveSpeed = require('wavespeed');

const client = new WaveSpeed(); // reads WAVESPEED_API_KEY from env

const result = await client.run("alibaba/wan-2.6/video-extend", {
        "prompt": "A cinematic shot of a city at sunset, soft golden light",
        "video": "https://example.com/your-input.mp4",
        "audio": "https://example.com/your-audio.mp3",
        "negative_prompt": "blurry, low quality, distorted",
        "resolution": "720p",
        "duration": 5,
        "shot_type": "single",
        "enable_prompt_expansion": false,
        "seed": -1
});

console.log(result.outputs[0]); // → URL of the generated output

Python example

# pip install wavespeed
import wavespeed

output = wavespeed.run(
    "alibaba/wan-2.6/video-extend",
    {
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "video": "https://example.com/your-input.mp4",
    "audio": "https://example.com/your-audio.mp3",
    "negative_prompt": "blurry, low quality, distorted",
    "resolution": "720p",
    "duration": 5,
    "shot_type": "single",
    "enable_prompt_expansion": false,
    "seed": -1
}
)

print(output["outputs"][0])  # → URL of the generated output

Wan 2.6 Video Extend API — Frequently asked questions

What is the Wan 2.6 Video Extend API?

Wan 2.6 Video Extend is a Alibaba model for video extension, exposed as a REST API on WaveSpeedAI. WAN 2.6 Video-Extend turns short clips into longer videos with preserved or generated synchronized audio for continuity. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing. You can call it programmatically or try it from the playground above.

How do I call the Wan 2.6 Video Extend API?

POST your input parameters to the model's REST endpoint (shown in the API tab of this playground) with your WaveSpeedAI API key in the Authorization header. Submission returns a prediction ID; poll the prediction endpoint until status flips to "completed", then read the output URL from the result. The playground generates a ready-to-paste code sample in Python, JavaScript, or cURL for whatever inputs you've set. Full request/response shape is documented at https://wavespeed.ai/docs/docs-api/alibaba/alibaba-wan-2.6-video-extend.

How much does Wan 2.6 Video Extend cost per run?

Wan 2.6 Video Extend starts at $0.25 per run. That figure is the base price — the final charge scales with the parameters you set in the form (output size, length, count, references, or whatever knobs this model exposes), so a higher-quality or larger output costs more than a minimal one. The exact cost for your current input is shown live next to the Generate button before you submit, and the actual per-call charge is recorded on the prediction afterwards.

What inputs does Wan 2.6 Video Extend accept?

Key inputs: `prompt`, `video`, `audio`, `resolution`, `duration`, `seed`. The full JSON schema (types, defaults, allowed values) is rendered above the Generate button and mirrored in the API reference at https://wavespeed.ai/docs/docs-api/alibaba/alibaba-wan-2.6-video-extend.

How do I get started with the Wan 2.6 Video Extend API?

Sign up for a free WaveSpeedAI account to claim starter credits, copy your API key from /accesskey, then call the endpoint shown in the API tab of the playground. The playground also auto-generates a code sample in Python, JavaScript, or cURL for the parameters you've set.

Can I use Wan 2.6 Video Extend outputs commercially?

Commercial usage rights depend on the model's license, set by its provider (Alibaba). The license summary appears on the model card above; see WaveSpeedAI's Terms of Service for platform-level conditions.

ExemplesTout voir

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