本教程是由Lynda机构出品的AE学徒之跟踪与键控高级教程，时长2小时16分，附工程源文件（638MB），使用软件：Adobe After Effects。

After Effects是Adobe公司推出的一款图形视频处理软件，适用于从事设计和视频特技的机构，包括电视台、动画制作公司、个人后期制作工作室以及多媒体工作室。而在新兴的用户群，如网页设计师和图形设计师中，也开始有越来越多的人在使用After Effects。属于层类型后期软件。

Lynda.com After Effects Apprentice 12: Tracking and Keying

In this course, Chris Meyer explores how to use the motion tracker and stabilizer built into After Effects and shows how to handle a variety of shots. The course includes a quick tour of the third-party software mocha and demonstrates the workflow for The Foundry’s KEYLIGHT, both bundled with After Effects. The course also covers tracking a greenscreen shot with a handheld camera and replacing its background. Exercise files are included with the course.

The After Effects Apprentice videos on lynda.com were created by Trish and Chris Meyer and are designed to be used on their own and as a companion to their book After Effects Apprentice.

Topics include:

* Understanding motion stabilization and keying

* Performing a track

* Applying tracking to effects

* Keying with KEYLIGHT

* Replacing images

* Improving the composite

* Garbage masking

* Dealing with interlaced footage