# What is AR 51

AR 51 is a **markerless motion-capture system**. It tracks people and objects in real time using infrared cameras and computer vision — **no markers, no suits, no wearables** — and streams skeletal motion into game engines, broadcast graphics, and analysis tools.

It runs in controlled studios and at full-scale live venues, and operates across lighting conditions from direct sunlight to darkness.

## What you can do with it

- **Capture motion** of one or many people simultaneously, plus tracked objects (e.g. balls in sports).
- **Stream skeletons in real time** into **Unity** and **Unreal** (incl. LiveLink and Disguise RenderStream).
- **Record and export** to FBX, C3D, NPZ, SMPL-X, glTF, CSV, and more.
- **Analyze** movement with built-in biomechanical visualization.

## Key specs

| | |
|---|---|
| Latency | ~9 ms at 120 fps |
| Markers / suits | None required |
| Multi-person | Yes |
| Scale | Small studio → full stadium |

## How the pieces fit

| Component | Role |
|---|---|
| **Cameras** (IR) | Capture the scene |
| **CV Server (CVS)** | Turns camera data into skeletons & tracked objects |
| **OMS** | Server communication & service discovery between components |
| **Mocap Studio** | Desktop app to record, calibrate, visualize, and export |
| **Engine SDKs** | Unity / Unreal plugins that consume the live data |

Next: [How it works →](/docs/introduction/how-it-works) · or jump to the [Quickstart](/docs/getting-started/quickstart).