Lucy Edit Dev | AI Video Enhancement API

Lucy-edit-dev — Ultra-Fast Text-Guided Video Editor

Lucy Edit Dev is a state-of-the-art text-guided video editing model. Give it a source video and a short prompt, and it will transform the content while preserving timing, camera motion, and overall composition.

What Lucy Edit Dev can do

Prompt-based video editing Change clothing, add or remove objects, alter styles, or adjust scene appearance using natural language instructions.
Structure-preserving edits Keeps original framing, motion, and pacing while modifying only the requested elements.
High temporal consistency Edits stay stable across frames, avoiding heavy flicker or “teleporting” artifacts.
Fast turnaround Optimized for quick responses so you can try multiple prompts and versions in minutes, not hours.

Inputs

video (required) The source clip to edit. The output duration matches the input duration (subject to platform limits).
prompt (required) A concise description of the desired edit, such as: “Turn the city into a futuristic neon metropolis” “Replace all cars with horse-drawn carriages” “Dress the people in medieval armor”

Pricing

Price per second: $0.030
Maximum supported duration per request: 120 seconds

How to use

Upload or paste the URL of your source video.
Write a clear prompt describing what should change and what should stay the same.
Click Run.
Preview the edited clip; if needed, tweak the prompt and re-run to iterate quickly.

Tips for best results

Keep prompts focused and specific (“Add light snowfall and winter coats” is better than “Make it different”).
Use reasonably clear, well-lit footage; very dark or heavily compressed videos reduce edit quality.
When refining a look, keep the core prompt and only adjust small details to get consistent outcomes.

Lucy Edit Dev API — Quick start

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/decart/lucy-edit-dev 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 Lucy Edit Dev below.

HTTP example

# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/decart/lucy-edit-dev" \
  -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"
}'

# 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("decart/lucy-edit-dev", {
        "prompt": "A cinematic shot of a city at sunset, soft golden light",
        "video": "https://example.com/your-input.mp4"
});

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

Python example

# pip install wavespeed
import wavespeed

output = wavespeed.run(
    "decart/lucy-edit-dev",
    {
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "video": "https://example.com/your-input.mp4"
}
)

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

Lucy Edit Dev API — Frequently asked questions

What is the Lucy Edit Dev API?

Lucy Edit Dev is a Decart model for video editing, exposed as a REST API on WaveSpeedAI. Lucy Edit Dev accelerates post-production, delivering studio-grade video edits in minutes instead of weeks. Ready-to-use REST inference API, best performance, no cold starts, affordable pricing. You can call it programmatically or try it from the playground above.

How do I call the Lucy Edit Dev 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/decart/decart-lucy-edit-dev.

How much does Lucy Edit Dev cost per run?

Lucy Edit Dev starts at $0.030 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 Lucy Edit Dev accept?

Key inputs: `prompt`, `video`. 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/decart/decart-lucy-edit-dev.

How do I get started with the Lucy Edit Dev 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 Lucy Edit Dev outputs commercially?

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

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