I am currently working on this project. It is part of a bigger project where I create an End-to-End system, each module of the system is replaceable.
Allow me to update this technical page later because it is under rapid development and a lot of things may change over time...
UPDATE: July 17th, 2018
Instance-level Human Tracking with pose estimation and portrait segmentation:
Here are some preliminary demos on DouYin videos;)