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description: Explore Ultralytics documentation on prediction function starters & register trackers. Understand our code & its applications better.
keywords: Ultralytics, YOLO, on predict start, register tracker, prediction functions, documentation
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# Reference for `ultralytics/trackers/track.py`
!!! note
Full source code for this file is available at [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/trackers/track.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/trackers/track.py). Help us fix any issues you see by submitting a [Pull Request](https://docs.ultralytics.com/help/contributing/) πŸ› οΈ. Thank you πŸ™!
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## ::: ultralytics.trackers.track.on_predict_start
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## ::: ultralytics.trackers.track.on_predict_postprocess_end
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## ::: ultralytics.trackers.track.register_tracker
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