Braid - multi-camera acquisition and tracking software

Braid logo

Braid is multi-camera acquisition and tracking software. It is useful for 3D tracking of animals, robots, or other moving objects. It operates with low latency and is suitable for closed-loop experimental systems such as virtual reality for freely moving animals.

Individual cameras are controlled with Strand Camera for low-latency 2D tracking without the use of markers and video recording to disk. Braid synchronizes multiple copies of Strand Camera and provides low-latency 3D tracking.

Braid is the successor of flydra, and is the result of a rewrite focused on performance, ease of use, and flexibility.


  • Hardware synchronized multiple camera acquisition using our open source hardware triggerbox
  • All per-camera features from Strand Camera
  • Realtime marker-free 3D tracking of multiple animals
  • Web based user interface allowing easy remote control
  • Integrated Python scripting

Supported operating system

Ubuntu Linux (64 bit Intel/AMD) is supported. We test internally on macOS and Windows.

Cost and licensing

Braid is free software in alpha testing. Releases are provided via a private repository on GitHub. Please email Andrew Straw with your GitHub account name for access.

Access to the source code is possible upon agreement with Andrew Straw. We have the goal of open sourcing the software.


Support is offered on a best effort basis via the github repository or the online forum. Contact Andrew Straw regarding for potential availability for collaboration, paid support, or custom development.