Skyreels V3 Extend Video | AI Video Extension API

Skywork AI SkyReels V3 Extend Video

Skywork AI SkyReels V3 Extend Video continues an existing video clip with newly generated footage from a natural-language prompt. Upload a source video, describe how the scene should evolve, and generate a smooth extension that keeps the original subject, motion, and visual context as the starting point.

Why Choose This?

Video continuation workflow Extend an existing clip instead of generating a new one from scratch.
Prompt-guided scene evolution Describe what should happen next using natural language.
Simple editing flow Upload one video, write a prompt, choose duration, and generate the extension.
Useful for short-form content Great for product reveals, social clips, concept shots, and scene continuation.
Production-ready API Suitable for video prototyping, commercial edits, and creative continuation workflows.

Parameters

Parameter	Required	Description
prompt	Yes	Text description of how the video should continue.
video	Yes	Source video to extend.
duration	No	Extension duration in seconds. Default: `5`.

How to Use

Upload your source video — provide the clip you want to continue.
Write your prompt — describe what should happen next in the scene.
Set duration (optional) — choose how long the extension should be.
Submit — run the model and download the extended video.

Example Prompt

Cut open the watermelon, show it off; the watermelon looks delicious.

Pricing

Pricing is based on duration.

Duration	Cost
5s	$0.20
10s	$0.40
15s	$0.60

Best Use Cases

Scene continuation — Extend an existing moment into a longer sequence.
Product demos — Continue a product interaction or reveal.
Short-form video creation — Build longer clips from short source footage.
Creative prototyping — Test how a shot or action could evolve.
Marketing edits — Expand short commercial clips with new motion.

Pro Tips

Keep the prompt focused on what should happen next.
Use a clear source video so the extension has a stronger visual anchor.
Start with shorter durations to validate the continuation before generating longer results.
Mention key actions, objects, and mood if you want tighter control over the extension.

Notes

prompt and video are required.
duration defaults to 5.
Pricing depends only on duration.

Related Models

Skywork AI SkyReels V3 Reference-to-Video — Generate videos from one or more reference images and a prompt.
Skywork AI SkyReels V3 Standard Single Avatar — Standard single-avatar talking video generation.
Skywork AI SkyReels V3 Pro Single Avatar — Higher-quality single-avatar speaking video generation.
Skywork AI SkyReels V3 Pro Multi Avatar — Higher-tier multi-avatar generation for more advanced character scenes.

Skyreels v3 Extend Video API — Quick start

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/skywork-ai/skyreels-v3/extend-video 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 Skyreels v3 Extend Video below.

HTTP example

# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/skywork-ai/skyreels-v3/extend-video" \
  -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",
    "duration": 5
}'

# 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("skywork-ai/skyreels-v3/extend-video", {
        "prompt": "A cinematic shot of a city at sunset, soft golden light",
        "video": "https://example.com/your-input.mp4",
        "duration": 5
});

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

Python example

# pip install wavespeed
import wavespeed

output = wavespeed.run(
    "skywork-ai/skyreels-v3/extend-video",
    {
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "video": "https://example.com/your-input.mp4",
    "duration": 5
}
)

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

Skyreels v3 Extend Video API — Frequently asked questions

What is the Skyreels v3 Extend Video API?

Skyreels v3 Extend Video is a Skywork Ai model for video extension, exposed as a REST API on WaveSpeedAI. SkyReels V3 Extend Video is a fast AI video extension model that continues existing videos using a prompt-guided extension workflow. Ready-to-use REST inference API for extending creative clips, continuing storytelling sequences, enhancing product videos, social media content, advertising creatives, and professional video generation workflows with simple integration, no coldstarts, and affordable pricing. You can call it programmatically or try it from the playground above.

How do I call the Skyreels v3 Extend Video 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/skywork-ai/skywork-ai-skyreels-v3-extend-video.

How much does Skyreels v3 Extend Video cost per run?

Skyreels v3 Extend Video starts at $0.20 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 Skyreels v3 Extend Video accept?

Key inputs: `prompt`, `video`, `duration`. 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/skywork-ai/skywork-ai-skyreels-v3-extend-video.

How do I get started with the Skyreels v3 Extend Video 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 Skyreels v3 Extend Video outputs commercially?

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

ExamplesView all

Related Models

README

Skywork AI SkyReels V3 Extend Video

Why Choose This?

Parameters

How to Use

Example Prompt

Pricing

Best Use Cases

Pro Tips

Notes

Related Models

Skyreels v3 Extend Video API — Quick start

Skyreels v3 Extend Video API — Frequently asked questions