Happyhorse

> 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 search "happyhorse"

Related Skills

# Full platform skill (all 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 list --category video

Documentation

• Running Apps - How to run apps via CLI

• Streaming Results - Real-time progress updates

• Content Pipeline Example - Building media workflows