2012 Slam Dunk Contest entrant Jeremy Evans
Here's when the NBA Slam Dunk Contest 2012 is and what TV channel you can watch it on. Reuters

Learn how to watch the NBA Amateur Slam Dunk Contest 2012 via Online Live Stream by reading this article.

The NBA Amateur Slam Dunk Contest 2012 starts at 4:30 p.m. today, kicking off NBA All-Star Weekend 2012, and will be one of the most-watched NBA events of the year.

This February, the NBA is bringing one of the most entertaining sporting events to Orlando -- NBA All-Star 2012. Returning for the first time since 1992, when Magic Johnson made his dramatic comeback on the court, NBA All-Star 2012 is a unique experience that celebrates the NBA's greatest athletes.

The contest will be broadcast on live TV on TNT. To determine which channel is TNT on your cable provider, consult channel information for Time Warner Cable, DirecTV, Dish and Comcast, which is available on their Web sites.

It will also be available to watch via free online live stream, which you can access by clicking this link, which will take you to the official Sprite Slam Dunk Contest streaming page.