Can I use aac in an commercial app for free?

I was wondering if I can use the aac codec in my commercial app for free (through lgpl ffmpeg). It says on the wiki:

Can someone else patent my open-sourced algorithm? [closed]

Closed 8 years ago.

Apache License and patents

I am trying to understand how Apache License affects patents. In regards to the Apache website http://www.apache.org/licenses/LICENSE-2.0 section 3, am I right to say for the first part that it is saying the licensee is allowed to do pretty much anything with the patent?

I want to publish an android app, but I’m afraid of software patents [closed]

Closed 10 years ago.