Vace Video Joiner

VACE Video Joiner merges multiple video clips into a single seamless output. Upload two or more videos and the model joins them together in order — no editing software required.

How to Use

Upload your videos — provide two or more clips via URL or drag-and-drop. Click Add Item to add more.
Submit — the model joins the clips in the order they were added.
Download your merged video.

Pricing

$0.20 per join. Joining 2 videos costs $0.20, joining 3 videos costs $0.40, and so on.

Best Use Cases

Content assembly — Combine multiple clips into a single continuous video for social media or presentations.
Scene stitching — Join separately generated or recorded scenes into one cohesive output.
Highlight reels — Merge selected clips into a single highlight video without manual editing.

Notes

videos is the only required field. Upload at least 2 clips to perform a join.
Clips are joined in the order they are added — arrange them accordingly before submitting.
Ensure video URLs are publicly accessible if using links rather than direct uploads.

Vace Video Joiner API — Quick start

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/wavespeed-ai/vace-video-joiner 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 Vace Video Joiner below.

HTTP example

# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/wavespeed-ai/vace-video-joiner" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY" \
  -d '{}'

# 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("wavespeed-ai/vace-video-joiner", {});

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

Python example

# pip install wavespeed
import wavespeed

output = wavespeed.run(
    "wavespeed-ai/vace-video-joiner",
    {}
)

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

Vace Video Joiner API — Frequently asked questions

What is the Vace Video Joiner API?

Vace Video Joiner is a WaveSpeedAI model for AI inference, exposed as a REST API on WaveSpeedAI. VACE Video Joiner seamlessly joins multiple video clips into one using AI-powered transition generation. Upload 2 to 4 videos and get a smoothly joined result. Ready-to-use REST inference API, no coldstarts, affordable pricing. You can call it programmatically or try it from the playground above.

How do I call the Vace Video Joiner 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/wavespeed-ai/vace-video-joiner.

How much does Vace Video Joiner cost per run?

Vace Video Joiner 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 Vace Video Joiner accept?

Key inputs: `videos`. 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/wavespeed-ai/vace-video-joiner.

How do I get started with the Vace Video Joiner 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 Vace Video Joiner outputs commercially?

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

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