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Happy Horse 1.0 Ref-to-Video

New

Happy Horse · Video · Image → Video

Generate video from up to 9 reference images — refer to them in the prompt as `[Image 1]`, `[Image 2]`, … in the same order they appear in the input list.

Model ID: happyhorse-1.0-r2vWorkflow: happyhorse/v1/reference-to-video
Multi-Image Input1080P3-15 sec
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Overview

Alongside the unified model APIs, we expose compatibility APIs that take each vendor's original parameters exactly as the vendor defines them — nothing renamed, nothing reshaped on the way through.

That makes them the shortest path onto Picsart if you already work with the vendor directly: the request bodies you've already written keep working as they are. You keep their parameter names and defaults, and you get the vendor's full parameter set rather than the subset that is shared across every model.

The cost is that a request is written for one vendor — switching models later means rewriting it, and results come back in the vendor's own shape. When you'd rather write once and change models freely, use the unified API.

Make a request

Call the workflow with ai.apis.run() in TypeScript, or hit /workflows/{workflow}/execute directly — params is passed through untouched either way.

These endpoints are addressed by workflow name rather than model id: the one in this model's header, since one model runs as one workflow. Authentication is unchanged — your Picsart API key as a bearer token (see Authentication).

ts
import { createClient, ApiRunMode } from '@picsart/ai-sdk';

const ai = createClient({
  apiKey: process.env.PICSART_API_KEY,
  apiUrl: 'https://api.green-salad-4efd.toolsminati.workers.dev',
});

// Calls the 'happyhorse/v1/reference-to-video' workflow directly — params are sent as-is.
const { result, usage } = await ai.apis.run('happyhorse/v1/reference-to-video', {
  prompt: "A serene mountain lake at golden hour, ultra detailed",
  media: [
    {
      type: "reference_image",
      url: "your value here"
    }
  ]
}, {
  mode: ApiRunMode.SYNC,
});

console.log(result); // workflow-specific output
console.log(usage?.credits); // credits charged

Async (submit & poll)

This model can run longer than the sync limit (~20s). In TypeScript, ai.apis.run(…, { mode: ApiRunMode.ASYNC }) polls for you; over HTTP, submit and poll yourself.

ts
import { createClient, ApiRunMode } from '@picsart/ai-sdk';

const ai = createClient({
  apiKey: process.env.PICSART_API_KEY,
  apiUrl: 'https://api.green-salad-4efd.toolsminati.workers.dev',
});

// mode: ASYNC submits the job and polls under the hood — you just await.
const { result } = await ai.apis.run('happyhorse/v1/reference-to-video', {
  prompt: "A serene mountain lake at golden hour, ultra detailed",
  media: [
    {
      type: "reference_image",
      url: "your value here"
    }
  ]
}, {
  mode: ApiRunMode.ASYNC,
});

console.log(result);

Parameters

8 parameters, sent inside params. These are the vendor's own names, so they line up one-for-one with the vendor's documentation. Required ones must be supplied; the rest fall back to their defaults.

ParameterTypeRequiredDefaultDetails
prompt
Text prompt describing the desired elements and visual style of the generated video. Use `[Image 1]`, `[Image 2]`, ... in the prompt to reference items in `media` by order (the first item is [Image 1]). Max 2500 characters; auto-truncated if longer.
stringyes
media
Array of reference images. 1–9 items, each of type `reference_image`. Order in this array defines the `[Image N]` mapping in the prompt.
HappyhorseR2VMediaItem[]yes
type
Media asset type. HH1 R2V supports only `reference_image`.
stringyesreference_image
reference_image
url
HTTP(S) URL of the reference image. Supported formats: JPEG, JPG, PNG, WEBP. Shortest side at least 400 px (720P or higher recommended). Max file size 20 MB.
stringyes
resolution
Video resolution tier. `720P` or `1080P`. Default `1080P`. Affects cost.
stringno1080P
720P1080P
ratio
Aspect ratio. One of `16:9`, `9:16`, `1:1`, `4:3`, `3:4`. Default `16:9`.
stringno16:9
16:99:161:14:33:4
duration
Video duration in seconds. Integer 3–15. Default 5. Affects cost.
numberno5
seed
Random seed controlling determinism. Integer in [0, 2147483647]. Randomly generated when omitted. Identical seeds do not guarantee identical results.
numberno
watermark
When true, embeds a "Happy Horse" watermark in the lower-right corner. Vendor default is true; Picsart default is false.
booleannofalse
options
GenAI options for safety checks and Drive saving.
objectno
safety_checks
Safety check settings
objectno
enabled
Whether to run content moderation. Defaults to true.
booleanno
drive
Save result to Picsart Drive
objectno
name
File name in Picsart Drive
stringyes
attributes
Custom attributes to attach to the file
objectno
folder
Target folder in Picsart Drive
objectno
inputs_transformation
Input transformation settings
objectno
downscale_oversized_images
Whether to downscale oversized input images. Defaults to false.
booleanno

Response

Over HTTP the output arrives inside a status envelope, at response.result. ai.apis.run() unwraps that envelope for you and resolves to { result, usage } instead. Either way the resultitself is the vendor's own shape.

json
{
  "result": {
    "url": "https://cdn.green-salad-4efd.toolsminati.workers.dev/…/result.mp4",
    "mimeType": "video/mp4",
    "driveFile": {}
  },
  "usage": {
    "credits": 5
  }
}