This dialog gives options such as increasing audio past 100%, forcing
the audio of a source to mono, and setting the audio sync offset of a
source (which was an oft-requested feature)
I feel like people keep mistaking how x264 preset functions. They often
associate it with their own CPU speed, and I feel the name does not help
with that issue. I think it may be for the best to just take it out.
At best, it will keep people away from using it unless they know what
they're doing, and at worst, people at least won't be able to associate
it with their CPU as easily anymore.
Change checkbox with text "Advanced Encoder Settings" to "Use Advanced
Encoder Settings". This way it will hint that the settings will be
disabled when unchecked.