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SysMocap

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What SysMocap is

SysMocap is free, open-source software for real-time, video-driven motion capture and 3D virtual-character rendering. It targets VTuber production, live streaming, augmented reality, and virtual reality, with versions for Linux, macOS, and Windows. You can drag 3D models into the application, including VRM 0.x and 1.0 avatars; VRoid Studio is listed as one way to create compatible avatars. Motion-capture examples cover facial, half-body, half-body with hands, and full-body tracking, including hand tracking and lip-sync workflows. Automatic skeleton detection works with VRM files and Mixamo-format FBX files, while other skeletons can be mapped manually. The viewer provides bone and dressing controls. SysMocap supports OBS live-streaming and can forward motion-capture data to the WebXR API over HTTPS. Its Material Design 3 interface includes dark mode and multilingual support, including English and Chinese. Windows packages target 64-bit Windows 10 and 11, while Intel Macs require macOS 10.15 or later; an Apple Silicon package is also listed. The project uses the Mozilla Public License 2.0.

Who it suits

SysMocap suits VTubers and creators who need video-based avatar tracking for live, AR, or VR projects. It also fits users working with VRM or Mixamo-format models on Linux, macOS, or Windows.

What it does well

  • Free and open-source
  • Full-body and hand motion capture
  • Automatic VRM and Mixamo skeleton detection
  • OBS and WebXR forwarding
  • Drag-and-drop model import

What to know first

  • Source setup requires current Node.js and npm
  • Other skeletons need manual mapping
  • Windows packages target 64-bit systems

Getting started

  1. Open the SysMocap GitHub website
  2. Download the package for Linux, macOS, or Windows
  3. On macOS, follow the project guidance for Gatekeeper or quarantine removal when required
  4. Drag a compatible VRM or other supported 3D model into the application
  5. For source use, install current Node.js, run npm install, then npm start
  6. Configure capture, streaming, or WebXR forwarding in the application

Verdict

SysMocap combines broad motion-capture coverage with VRM and FBX skeleton support across three desktop platforms. Its free, open-source license and OBS/WebXR forwarding make it suitable for creators building tracked virtual characters.

Questions

Is SysMocap free?

Yes. It is free, open-source software, and no free trial is offered.

Which operating systems are supported?

SysMocap runs on Linux, macOS, and Windows. Windows packages target 64-bit Windows 10 and 11, while Intel macOS requires version 10.15 or later; an Apple Silicon package is also listed.

What avatar formats can it use?

The project supports VRM 0.x and 1.0 avatars and identifies VRoid Studio as an avatar-creation option. Automatic skeleton detection also supports Mixamo-format FBX files.

Can it stream motion data?

Yes. SysMocap supports OBS live streaming and can forward motion-capture data to the WebXR API over HTTPS.

What license does it use?

The repository identifies the Mozilla Public License 2.0.

Facts from SysMocap's own pages

Avatar tools
The README says users can create avatars with VRoid Studio and that VRM 0.x and 1.0 are supported. · github.com, 9 Oct 2026
Data forwarding note
The README notes that HTTP and HTTPS use the same port in Mocap Data Forward. · github.com, 9 Oct 2026
Dependencies
The project credits MediaPipe Holistic for motion capture, Kalidokit for motion-capture data calculations, and Electron and Vue.js for the GUI framework. · github.com, 8 Oct 2026
Interface
The software has a Material Design 3 interface with dark mode support. · github.com, 8 Oct 2026
Language
The README describes the software as multilingual, including English and Chinese. · github.com, 9 Oct 2026
License
The GitHub repository lists the MPL-2.0 license. · github.com, 9 Oct 2026
macOS requirements
The README lists Intel macOS packages for macOS 10.15 or later and separate Apple Silicon packages. · github.com, 9 Oct 2026
macOS setup
The README advises users to disable Gatekeeper checks and provides a command to remove quarantine attributes if macOS reports the app as damaged. · github.com, 9 Oct 2026
Model compatibility
The README identifies VRoid Studio as a way to create avatars and says VRM 0.x and 1.0 are supported. · github.com, 8 Oct 2026
Model import
The README says users can import 3D models by dragging them into the app. · github.com, 9 Oct 2026
Model viewer
The model viewer includes bone and dressing controls. · github.com, 9 Oct 2026
Motion capture
The software supports full-body motion capture. · github.com, 9 Oct 2026
Platforms
Prebuilt packages are available for Windows and macOS; Linux is listed as source code only. · github.com, 9 Oct 2026
Purpose
SysMocap is a real-time, video-driven motion-capture and 3D virtual-character rendering system for VTuber, live, AR, and VR use. · github.com, 9 Oct 2026
Skeleton detection
It supports automatic skeleton detection for VRM 0.x and 1.0 files and Mixamo-format FBX files, plus manual mapping for other skeleton structures. · github.com, 9 Oct 2026
Skeleton support
It supports automatic skeleton detection for VRM 0.x and 1.0 files and Mixamo-format FBX files, plus manual mapping for other skeleton structures. · github.com, 8 Oct 2026
Source setup
Running from source requires a current Node.js installation and uses npm install followed by npm start. · github.com, 8 Oct 2026
Streaming
The README says SysMocap supports OBS live streaming. · github.com, 9 Oct 2026
WebXR
Motion-capture forwarding supports the WebXR API over HTTPS only. · github.com, 9 Oct 2026
Windows requirements
The README lists 64-bit Windows 10 and 11 packages for x86_64 and ARM64 processors. · github.com, 9 Oct 2026

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