CoTracker is a multi-object tracker developed by the Facebook AI Research team, based on the latest model architecture and training methods, which achieves excellent performance across various visual tasks and datasets. This tracker enables real-time and efficient multi-object tracking, and performs well in object detection, tracking, and recognition. The open-source release of CoTracker is expected to bring new ideas and innovations to the field of multi-object tracking, potentially providing technical support for a wider range of application scenarios.