happyhorse

SKILL.md

Install the belt CLI skill: npx skills add belt-sh/cli

HappyHorse 1.0 Video Generation

Generate and edit physically realistic videos with Alibaba's HappyHorse 1.0 models via inference.sh CLI.

Quick Start

Requires inference.sh CLI (belt). Install instructions

belt login

belt app run alibaba/happyhorse-1-0-t2v --input '{"prompt": "a horse galloping across a sunlit meadow"}'

HappyHorse Models

Model
App ID
Best For

T2V
alibaba/happyhorse-1-0-t2v
Text-to-video, physically realistic motion

I2V
alibaba/happyhorse-1-0-i2v
Animate a single image

R2V
alibaba/happyhorse-1-0-r2v
Preserve characters from up to 9 reference images

Video Edit
alibaba/happyhorse-1-0-video-edit
Edit existing videos with natural language

All models support 720P/1080P resolution, up to 15 seconds duration.

Examples

Text-to-Video

belt app run alibaba/happyhorse-1-0-t2v --input '{
  "prompt": "a golden retriever running through autumn leaves in a park, slow motion",
  "duration": 10,
  "resolution": "1080P",
  "ratio": "16:9"
}'

Image-to-Video

Animate a still image:

belt app run alibaba/happyhorse-1-0-i2v --input '{
  "first_frame": "https://your-image.jpg",
  "prompt": "gentle camera zoom, clouds moving in the sky",
  "duration": 8,
  "resolution": "720P"
}'

Reference-to-Video (Character Preservation)

Generate videos that preserve characters from reference images (up to 9):

belt app run alibaba/happyhorse-1-0-r2v --input '{
  "prompt": "a woman walking through a busy market street",
  "reference_images": ["https://portrait.jpg"],
  "duration": 10,
  "resolution": "720P"
}'

Multi-Character Reference

belt app run alibaba/happyhorse-1-0-r2v --input '{
  "prompt": "two friends sitting at a cafe having coffee",
  "reference_images": ["https://person1.jpg", "https://person2.jpg"],
  "ratio": "16:9"
}'

Video Editing

Edit existing videos using natural language instructions:

belt app run alibaba/happyhorse-1-0-video-edit --input '{
  "video": "https://your-video.mp4",
  "prompt": "change the background to a snowy mountain landscape"
}'

Video Editing with Reference Images

belt app run alibaba/happyhorse-1-0-video-edit --input '{
  "video": "https://your-video.mp4",
  "prompt": "replace the person with the character from the reference image",
  "reference_images": ["https://character.jpg"]
}'

Video Editing with Audio Control

belt app run alibaba/happyhorse-1-0-video-edit --input '{
  "video": "https://your-video.mp4",
  "prompt": "make the scene look like a rainy day",
  "audio_setting": "generate"
}'

Pricing

Resolution
Price

720P
$0.14 per second

1080P
$0.24 per second

Video Edit is billed on input + output duration.

Parameters (T2V)

Parameter
Type
Default
Description

prompt
string
required
Text description of the video

duration
integer
5
Duration in seconds (3–15)

resolution
enum
720P
720P or 1080P

ratio
enum
16:9
16:9, 9:16, 1:1, 4:3, 3:4, 21:9

seed
integer
random
Reproducible generation

watermark
boolean
false
Add HappyHorse watermark

Parameters (I2V)

Parameter
Type
Default
Description

first_frame
file
required
First frame image (JPEG, PNG, WebP)

prompt
string
-
Optional text description

duration
integer
5
Duration in seconds (3–15)

resolution
enum
720P
720P or 1080P

seed
integer
random
Reproducible generation

Parameters (R2V)

Parameter
Type
Default
Description

prompt
string
required
Text description of the scene

reference_images
array
required
Up to 9 character reference images

duration
integer
5
Duration in seconds (3–15)

resolution
enum
720P
720P or 1080P

ratio
enum
16:9
16:9, 9:16, 1:1, 4:3, 3:4, 21:9

seed
integer
random
Reproducible generation

Parameters (Video Edit)

Parameter
Type
Default
Description

video
file
required
Video to edit (MP4/MOV, H.264)

prompt
string
required
Editing instruction

reference_images
array
-
Up to 5 reference images

audio_setting
enum
auto
auto, generate, or keep_original

resolution
enum
720P
720P or 1080P

seed
integer
random
Reproducible generation

Search HappyHorse Apps

belt app store search "happyhorse"

Related Skills

# Full platform skill (all 250+ apps)
npx skills add inference-sh/skills@infsh-cli

# All video generation models
npx skills add inference-sh/skills@ai-video-generation

# Seedance 2.0
npx skills add inference-sh/skills@seedance

# Google Veo
npx skills add inference-sh/skills@google-veo

# Image generation (for image-to-video)
npx skills add inference-sh/skills@ai-image-generation

Browse all video apps: belt app store --category video

Documentation

Running Apps - How to run apps via CLI

Streaming Results - Real-time progress updates

Content Pipeline Example - Building media workflows

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