Vidu Q3 Start End to Video | Fast Image-to-Video API

Vidu Q3 Start-End-to-Video

Vidu Q3 Start-End-to-Video generates videos with precise control over both the first and last frames. Provide a start image, an end image, and a text prompt — the model creates a smooth, coherent video transition between the two states. Supports multiple resolutions, motion control, and optional audio generation with background music.

Why Choose This?

Start and end frame control Define both the beginning and ending visuals for precise, predictable video transitions.
Smooth interpolation AI-powered motion generates natural, fluid movement between your two reference frames.
Multiple resolutions Choose from 540p, 720p, or 1080p to balance quality and cost.
Motion control Adjust movement_amplitude to control the intensity of motion in the transition.
Audio generation Optional synchronized audio and background music for complete video content.
Prompt Enhancer Built-in tool to automatically improve your scene descriptions.

Parameters

Parameter	Required	Description
prompt	Yes	Text description of the desired motion and action
image	Yes	Start frame image (URL or upload)
last_image	Yes	End frame image (URL or upload)
duration	No	Video length in seconds (default: 5)
resolution	No	Output resolution: 540p, 720p, or 1080p (default: 720p)
bgm	No	Include background music (default: enabled)
generate_audio	No	Whether to generate synchronized audio (default: enabled)
movement_amplitude	No	Motion intensity: auto or manual value (default: auto)
seed	No	Random seed for reproducible results (default: -1)

How to Use

Upload your start image — provide the first frame of the video.
Upload your end image — provide the last frame of the video.
Write your prompt — describe the motion, action, and transition between the two frames.
Set duration — specify how long you want the video to be.
Set resolution — choose 540p for speed, 720p for balance, or 1080p for quality.
Adjust motion (optional) — control movement intensity with movement_amplitude.
Enable audio (optional) — toggle generate_audio and bgm for complete video with sound.
Run — submit and download your video.

Pricing

Resolution	Cost per Second
540p	$0.07
720p	$0.15
1080p	$0.16

Billing Rules

Per-second billing based on duration and resolution
Total cost = duration × per-second rate

Examples

5s @ 540p → 5 × $0.07 = $0.35
5s @ 720p → 5 × $0.15 = $0.75
5s @ 1080p → 5 × $0.16 = $0.80
10s @ 720p → 10 × $0.15 = $1.50

Best Use Cases

Scene Transitions — Create smooth cinematic transitions between two visual states.
Product Morphing — Show product transformations, color changes, or feature variations.
Before/After Content — Generate engaging videos showing transformations or comparisons.
Character Animation — Animate a character moving from one pose to another.
Time-Lapse Effects — Create artificial time-lapse videos with controlled start and end points.

Pro Tips

Use images with similar composition for smoother transitions.
The prompt should describe the motion and action happening between frames, not just the static scenes.
Start with shorter durations (5s) to test transitions before generating longer clips.
Set a seed value to reproduce the same result or create consistent variations.
Lower movement_amplitude for subtle transitions, higher for dramatic transformations.

Notes

Prompt, image, and last_image are all required fields.
Higher resolution increases both quality and cost.
Audio generation (generate_audio and bgm) is included at no extra cost.
Seed value of -1 means random seed.

Related Models

Vidu Q3 Turbo Text-to-Video — Fast text-to-video generation without reference images.
Vidu Q3 Turbo Image-to-Video — Animate a single image into video.

Q3 Start End To Video API — Quick start

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/vidu/q3/start-end-to-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 Q3 Start End To Video below.

HTTP example

# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/vidu/q3/start-end-to-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",
    "image": "https://example.com/your-input.jpg",
    "duration": 5,
    "resolution": "720p",
    "bgm": true,
    "generate_audio": true,
    "movement_amplitude": "auto",
    "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("vidu/q3/start-end-to-video", {
        "prompt": "A cinematic shot of a city at sunset, soft golden light",
        "image": "https://example.com/your-input.jpg",
        "duration": 5,
        "resolution": "720p",
        "bgm": true,
        "generate_audio": true,
        "movement_amplitude": "auto",
        "seed": -1
});

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

Python example

# pip install wavespeed
import wavespeed

output = wavespeed.run(
    "vidu/q3/start-end-to-video",
    {
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "image": "https://example.com/your-input.jpg",
    "duration": 5,
    "resolution": "720p",
    "bgm": true,
    "generate_audio": true,
    "movement_amplitude": "auto",
    "seed": -1
}
)

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

Q3 Start End To Video API — Frequently asked questions

What is the Q3 Start End To Video API?

Q3 Start End To Video is a Vidu model for video generation from images, exposed as a REST API on WaveSpeedAI. Vidu Q3 Start End Image-to-Video turns text prompts into high-quality videos with exceptional visual fidelity and diverse motion. 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 Q3 Start End To 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/vidu/vidu-q3-start-end-to-video.

How much does Q3 Start End To Video cost per run?

Q3 Start End To Video starts at $0.35 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 Q3 Start End To Video accept?

Key inputs: `prompt`, `image`, `resolution`, `duration`, `seed`, `bgm`. 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/vidu/vidu-q3-start-end-to-video.

How do I get started with the Q3 Start End To 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 Q3 Start End To Video outputs commercially?

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

ExamplesView all

Related Models

README

Vidu Q3 Start-End-to-Video

Why Choose This?

Parameters

How to Use

Pricing

Billing Rules

Examples

Best Use Cases

Pro Tips

Notes

Related Models

Q3 Start End To Video API — Quick start

Q3 Start End To Video API — Frequently asked questions