Pixverse V6 Extend | AI Video Extension API

PixVerse V6 Video Extend

PixVerse V6 Video Extend continues an existing video clip with new AI-generated footage, seamlessly picking up where the original ends. Describe where the scene should go next — the model generates a natural, motion-consistent extension with optional style control, negative prompting, and synchronized audio.

Need to generate from scratch? Try PixVerse V6 Text-to-Video

Why Choose This?

Seamless video continuation Extends your existing clip with new AI-generated footage that matches the original motion, style, and scene context.
Prompt-guided extension Describe what should happen next — direct the action, camera movement, and atmosphere of the extended segment.
Style control Apply a specific visual style to the extension for creative or consistent branded output.
Optional audio generation Enable generate_audio_switch to produce synchronized ambient sound alongside the extended video.
Negative prompt support Specify what to avoid in the extension for more precise control over the output.
Multiple resolution tiers Generate extensions at 360p, 540p, 720p, or 1080p to match your delivery requirements.

Parameters

Parameter	Required	Description
prompt	Yes	Text description of what should happen in the extended segment.
video	Yes	Source video to extend (URL or file upload).
resolution	No	Output resolution: 360p, 540p, 720p (default), or 1080p.
duration	No	Length of the extension in seconds. Default: 5.
generate_audio_switch	No	Whether to generate synchronized audio for the video. Default: off.
negative_prompt	No	Elements to exclude from the extended footage.
style	No	Visual style to apply to the extension.
seed	No	Random seed for reproducible results.

How to Use

Upload your video — provide the source clip to extend via URL or drag-and-drop.
Write your prompt — describe what should happen next in the scene.
Select resolution — 360p for drafts, 720p for standard output, 1080p for final production.
Set duration — choose how many seconds to extend the video by.
Enable audio (optional) — check generate_audio_switch to generate synchronized sound.
Add negative prompt (optional) — specify elements you want to avoid in the extension.
Set style (optional) — apply a specific visual style to the extended footage.
Set seed (optional) — fix the seed to reproduce a specific result in future runs.
Submit — generate, preview, and download your extended video.

Pricing

Resolution	Without Audio	With Audio
360p	$0.025/s	$0.035/s
540p	$0.035/s	$0.045/s
720p	$0.045/s	$0.060/s
1080p	$0.090/s	$0.115/s

Billing Rules

Billing is calculated per second of extension generated
Audio generation increases cost per second at each resolution tier
Examples: 10s extension at 720p (no audio) = $0.45 — 10s at 1080p (no audio) = $0.90

Best Use Cases

Short Film & Narrative — Extend key scenes to develop story beats without reshooting.
Social Media Content — Lengthen clips to hit optimal duration for Reels, TikTok, and Shorts.
Marketing & Advertising — Extend product or campaign videos to fill longer ad slots.
Creative Exploration — Explore alternate continuations of the same source clip with different prompts.
Loop & Ambient Video — Generate extended atmospheric footage from a short seed clip.

Pro Tips

Be specific about what should happen next — camera movement, subject action, and environmental changes.
Use negative_prompt to prevent the extension from repeating or contradicting the source footage.
Use 360p at short durations to test your prompt direction before committing to a high-resolution extension.
Fix the seed once you find a direction you like to iterate consistently across different durations.

Notes

Both prompt and video are required fields; all other parameters are optional.
Ensure video URLs are publicly accessible if using a link rather than a direct upload.
Please follow PixVerse's content usage policies when crafting prompts.

Related Models

PixVerse V6 Text-to-Video — Generate video from text prompts from scratch.
PixVerse V6 Image-to-Video — Animate a reference image into a cinematic video clip.

Pixverse v6 Extend API — Quick start

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/pixverse/pixverse-v6/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 Pixverse v6 Extend below.

HTTP example

# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/pixverse/pixverse-v6/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",
    "resolution": "720p",
    "duration": 5,
    "generate_audio_switch": false
}'

# 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("pixverse/pixverse-v6/extend", {
        "prompt": "A cinematic shot of a city at sunset, soft golden light",
        "video": "https://example.com/your-input.mp4",
        "resolution": "720p",
        "duration": 5,
        "generate_audio_switch": false
});

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

Python example

# pip install wavespeed
import wavespeed

output = wavespeed.run(
    "pixverse/pixverse-v6/extend",
    {
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "video": "https://example.com/your-input.mp4",
    "resolution": "720p",
    "duration": 5,
    "generate_audio_switch": false
}
)

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

Pixverse v6 Extend API — Frequently asked questions

What is the Pixverse v6 Extend API?

Pixverse v6 Extend is a Pixverse model for video extension, exposed as a REST API on WaveSpeedAI. PixVerse V6 Extend continues and enhances existing video content by analyzing the ending segment and generating new frames forward. Supports 360p to 1080p resolutions, 1-15 second extension duration, optional audio generation, and multiple styles. 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 Pixverse v6 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/pixverse/pixverse-pixverse-v6-extend.

How much does Pixverse v6 Extend cost per run?

Pixverse v6 Extend starts at $0.025 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 Pixverse v6 Extend accept?

Key inputs: `prompt`, `video`, `resolution`, `duration`, `generate_audio_switch`. 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/pixverse/pixverse-pixverse-v6-extend.

How do I get started with the Pixverse v6 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 Pixverse v6 Extend outputs commercially?

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

ExamplesView all

Related Models

README

PixVerse V6 Video Extend

Why Choose This?

Parameters

How to Use

Pricing

Billing Rules

Best Use Cases

Pro Tips

Notes

Related Models

Pixverse v6 Extend API — Quick start

Pixverse v6 Extend API — Frequently asked questions