ohao

Process animations and retarget them onto any humanoid character
CLI & Python SDK for game developers

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ohao is the SDK for MoGen3D — process videos into animation files (BVH / FBX) and retarget them onto your characters.

Install

pip install ohao

Retargeting requires Blender (3.6+) installed locally.

Quick Start

# Log in once — opens browser, you paste your API key
ohao login

from ohao.mogen3d import MoGen3DClient, retarget

# No api_key needed — auto-reads from ~/.ohao/credentials.json
client = MoGen3DClient()

# Check sparks balance (each job costs 1 spark)
sparks = client.sparks()
print(f"{sparks.balance} sparks available")

# Claim daily free sparks
if sparks.can_claim:
    client.claim_sparks()

# Process a video → download BVH
job = client.process("dance.mp4", wait=True)
bvh = job.download(format="bvh")

# Retarget onto your character (runs locally via Blender)
retarget(str(bvh), "MyCharacter.fbx")

CLI

# Auth
ohao login                   # save API key locally (one-time)
ohao whoami                  # check account info
ohao logout                  # remove saved credentials

# Sparks
ohao mogen3d sparks          # check balance
ohao mogen3d claim           # claim daily free sparks
ohao mogen3d bundles         # list purchasable bundles

# Process a video (costs 1 spark)
ohao mogen3d process dance.mp4 --format bvh -o dance.bvh

# Retarget onto a character (free, runs locally)
ohao mogen3d retarget dance.bvh MyCharacter.fbx --preset mixamo

Sparks

Sparks are the credits that power processing jobs. 1 spark = 1 job. Retargeting is free (runs locally).

	Free	Pro
Daily sparks	1/day	15/day (accumulates up to 100)
Exports	BVH	BVH + FBX
Daily job limit	5	50

Need more? Purchase spark bundles:

Bundle	Price
30 sparks	$3.99
100 sparks	$9.99
1,000 sparks	$59.99

# Check available bundles
for bundle in client.bundles():
    print(f"{bundle.label}: {bundle.price}")

# Purchase (opens Stripe checkout)
url = client.purchase_bundle("sparks_100")

Sparks are refunded automatically if a job fails.

Retargeting

The SDK auto-detects your character's rig type and maps bones automatically.

Rig Type	Detection	Characters
Mixamo	Hips bone (with optional prefix like mixamorig:)	X Bot, Y Bot, any Mixamo character
UE5 Mannequin	pelvis bone	Quinn, Manny, Quaternius models

# Auto-detect (works for most characters)
retarget("dance.bvh", "XBot.fbx")

# Explicit preset
retarget("dance.bvh", "Quinn.gltf", preset="ue5")

# Custom Blender path
retarget("dance.bvh", "MyChar.fbx", blender_path="/path/to/blender")

# Open in Blender GUI to inspect
retarget("dance.bvh", "MyChar.fbx", background=False)

Supported Formats

Input	Output
Video: .mp4, .mov, .webm	.bvh, .fbx (via cloud processing)
Animation: .bvh, .fbx	Retargeted .blend file (local)
Character: .fbx, .glb, .gltf

API Reference

MoGen3DClient

client = MoGen3DClient(api_key="mg_...", base_url="https://...")

Method	Description
client.sparks()	Get sparks balance and claim status
client.claim_sparks()	Claim daily sparks
client.bundles()	List purchasable spark bundles
client.purchase_bundle(id)	Start Stripe checkout for a bundle
client.status()	Account tier, usage, subscription info
client.process(path, *, wait=False)	Upload video, start processing (1 spark)
client.list_jobs()	List all jobs
client.get_job(id)	Get job by ID
client.download(id, format="bvh")	Download result file
client.delete_job(id)	Delete a job

retarget()

retarget(
    bvh_path,            # Path to BVH file
    character_path,      # Path to character (.fbx / .glb / .gltf)
    *,
    output_path=None,    # Output .blend path (default: auto-named)
    preset=None,         # "mixamo", "ue5", or path to JSON
    blender_path=None,   # Blender executable (default: auto-detect)
    background=True,     # Run headless (default: True)
)

Examples

See the examples/ directory for runnable scripts:

Example	Description
basic_retarget.py	Minimal one-liner retarget
batch_retarget.py	Apply one BVH to a folder of characters
retarget_with_preset.py	Force a specific rig preset
inspect_in_blender.py	Open result in Blender GUI
custom_blender_path.py	Use a specific Blender install

Adding a Custom Rig Preset

If your character uses a non-standard skeleton, create a JSON preset:

{
  "name": "My Rig",
  "bone_map": {
    "Hips": "my_pelvis",
    "Spine": "my_spine_01",
    "Head": "my_head",
    "LeftArm": "my_upper_arm_L",
    "LeftForeArm": "my_lower_arm_L",
    "RightArm": "my_upper_arm_R",
    "RightForeArm": "my_lower_arm_R",
    "LeftUpLeg": "my_thigh_L",
    "LeftLeg": "my_shin_L",
    "RightUpLeg": "my_thigh_R",
    "RightLeg": "my_shin_R"
  },
  "root_bone": "Hips"
}

Keys on the left are the BVH bone names. Values on the right are your character's bone names. Then pass it:

retarget("dance.bvh", "MyRig.fbx", preset="my_rig.json")

ohao mogen3d retarget dance.bvh MyRig.fbx --preset my_rig.json

Authentication

The recommended way to authenticate:

ohao login

This opens your browser, you create/copy an API key, paste it in the terminal, and it's saved to ~/.ohao/credentials.json. All subsequent commands and MoGen3DClient() calls use it automatically — no API key in your code.

Alternatively, you can set an environment variable or pass it explicitly:

export OHAO_API_KEY=mg_your_key     # env var

client = MoGen3DClient(api_key="mg_...")  # explicit (not recommended)

Priority order: explicit api_key= > OHAO_API_KEY env var > ~/.ohao/credentials.json

License

MIT