HappyHorse 1.0 Image to Video | Fast Image-to-Video API

Alibaba Happy Horse 1.0 Image-to-Video

Happy Horse 1.0 Image-to-Video animates a reference image into a cinematic 720p / 1080p video, with optional text guidance for the motion. Strong subject preservation, smooth camera movement, and expressive motion.

Key Features

Image-faithful generation — Preserves the reference image's subject, composition, and style while adding motion.
Optional prompt guidance — Direct the camera, mood, and action in plain language.
Cinematic motion — Smooth, expressive movement and stable subjects.
Production-ready API — REST inference, no cold starts.

Parameters

Parameter	Required	Description
image	Yes	First-frame image URL. JPEG / PNG / BMP / WEBP. Min dimension 300 px. Aspect ratio 1:2.5 to 2.5:1. Max 10 MB.
prompt	No	Optional text prompt guiding the animation (max 2500 characters).
resolution	No	`720p` (default) or `1080p`.
duration	No	Video length in seconds (3-15, default 5).
seed	No	Random seed for reproducibility (0-2147483647).

Pricing

Resolution	Per second
720p	$0.14
1080p	$0.28

Examples (5s):

Resolution	Cost
720p	$0.70
1080p	$1.40

Examples (10s):

Resolution	Cost
720p	$1.40
1080p	$2.80

Notes

Pricing scales linearly with duration (3-15 s).
1080p is 2× the 720p rate.
Aspect ratio of the output video matches the reference image automatically.

Related Models

Alibaba Happy Horse 1.0 Text-to-Video — Generate video directly from text.

Happyhorse 1.0 Image To Video API — Quick start

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/alibaba/happyhorse-1.0/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 1.0 Image To Video below.

HTTP example

# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/alibaba/happyhorse-1.0/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-1.0/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-1.0/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 1.0 Image To Video API — Frequently asked questions

What is the Happyhorse 1.0 Image To Video API?

Happyhorse 1.0 Image To Video is a Alibaba model for video generation from images, exposed as a REST API on WaveSpeedAI. Alibaba Happy Horse 1.0 (Image-to-Video) animates a reference image into a cinematic 720p / 1080p video, optionally guided by a text prompt. Smooth camera movement and expressive, stable motion. Ready-to-use REST 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 1.0 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-1.0-image-to-video.

How much does Happyhorse 1.0 Image To Video cost per run?

Happyhorse 1.0 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 1.0 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-1.0-image-to-video.

How do I get started with the Happyhorse 1.0 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 1.0 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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