Νear the end of 2014, libav became the default library. Until then it was up to the user to choose, so most of us were with ffmpeg due to our old use flags.
Given the new status quo, my system refused to update since it would pull both libav due to the new profile and ffmpeg due to my use flags. As the Gentoo devs made this new choice, I thought I should embrace it, so I followed the steps to switch to libav. This created a nightmare of dependency issues that took me months to solve, especially given my limited time and that this happened on my main machine. I finally switched back to ffmpeg but it seemed to me that only when it —libav— was removed from Gentoo's default desktop profile my problems really stopped.
