HappyHorse 1.1 Image to Video API

Alibaba Happy Horse 1.1 Image-to-Video

Alibaba Happy Horse 1.1 Image-to-Video animates a reference image into a cinematic video with optional text guidance for motion, camera movement, and scene direction. It supports 720p and 1080p output, while preserving the reference image's subject, composition, and visual style.

Why Choose This?

Image-faithful generation
Preserves the reference image's subject, composition, and style while adding motion.
Optional prompt guidance
Describe the camera movement, mood, action, and scene development in plain language.
Cinematic motion
Generate smooth, expressive motion with stable subject preservation.
Flexible resolution options
Choose 720p for standard generation or 1080p for higher-resolution output.
Production-ready API
Use REST inference for image-to-video generation workflows.

Parameters

Parameter	Required	Description
image	Yes	First-frame image URL. Supported formats: JPEG, PNG, BMP, WEBP. Minimum dimension: 300 px. Aspect ratio: 1:2.5 to 2.5:1. Maximum file size: 10 MB.
prompt	No	Optional text prompt guiding the animation. Maximum length: 2500 characters.
resolution	No	Output resolution: `720p` or `1080p`. Default: `720p`.
duration	No	Video length in seconds. Supported range: `3` to `15`. Default: `5`.
seed	No	Random seed for reproducibility. Supported range: `0` to `2147483647`.

How to Use

Upload image — Provide a first-frame image URL.
Add prompt guidance (optional) — Describe the desired motion, camera behavior, mood, or action.
Select resolution — Choose 720p or 1080p.
Set duration — Choose a duration from 3 to 15 seconds.
Set seed (optional) — Use a fixed seed for reproducible results.
Generate — Create the image-to-video output.

Pricing

Pricing scales linearly with duration.

Resolution	Per 5s	Per second
720p	$0.70	$0.14
1080p	$0.945	$0.189

Examples (5s):

Resolution	Cost
720p	$0.70
1080p	$0.945

Examples (10s):

Resolution	Cost
720p	$1.40
1080p	$1.89

Best Use Cases

Image-to-video animation — Animate a reference image into a short video.
Cinematic motion generation — Add smooth camera movement and scene motion to a still image.
Character and subject animation — Preserve the main subject while generating natural motion.
Creative video previews — Create short visual clips from concept images or storyboards.
Social media content — Generate short-form video assets from still images.

Pro Tips

Use a clear first-frame image with the main subject visible.
Keep the prompt focused on motion, camera behavior, and scene development.
Use 720p for standard generation and lower cost.
Use 1080p when higher-resolution output is needed.
Use a fixed seed when you want more reproducible results.
Make sure the input image matches the desired output composition.

Related Models

Alibaba Happy Horse 1.1 Text-to-Video — Generate video directly from text.

Happyhorse 1.1 Image To Video API — Quick start

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/alibaba/happyhorse-1.1/image-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 Happyhorse 1.1 Image To Video below.

HTTP example

# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/alibaba/happyhorse-1.1/image-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",
    "resolution": "720p",
    "duration": 5,
    "seed": 0
}'

# 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("alibaba/happyhorse-1.1/image-to-video", {
        "prompt": "A cinematic shot of a city at sunset, soft golden light",
        "image": "https://example.com/your-input.jpg",
        "resolution": "720p",
        "duration": 5,
        "seed": 0
});

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

Python example

# pip install wavespeed
import wavespeed

output = wavespeed.run(
    "alibaba/happyhorse-1.1/image-to-video",
    {
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "image": "https://example.com/your-input.jpg",
    "resolution": "720p",
    "duration": 5,
    "seed": 0
}
)

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

Happyhorse 1.1 Image To Video API — Frequently asked questions

What is the Happyhorse 1.1 Image To Video API?

Happyhorse 1.1 Image To Video is a Alibaba model for video generation from images, exposed as a REST API on WaveSpeedAI. Alibaba HappyHorse 1.1 Image to Video animates a reference image into a cinematic 720P or 1080P video, with optional text prompt guidance, smooth camera movement, and expressive, stable 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 Happyhorse 1.1 Image 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/alibaba/alibaba-happyhorse-1.1-image-to-video.

How much does Happyhorse 1.1 Image To Video cost per run?

Happyhorse 1.1 Image To Video starts at $0.70 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 Happyhorse 1.1 Image To Video accept?

Key inputs: `prompt`, `image`, `resolution`, `duration`, `seed`. 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/alibaba/alibaba-happyhorse-1.1-image-to-video.

How do I get started with the Happyhorse 1.1 Image 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 Happyhorse 1.1 Image To Video outputs commercially?

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

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