To understand what´s happen : The "compondplug" is the sony vegas standard encoder... when you rename it, sony vegas didn´t find your "stock" encoder, so, he "jumps" to the second option, the "mcmp4plug2", and on the majoritary times, works !! (but the mcmp4plug isn´t have a good performance like the compoundplug of the sony vegas... but.... works for a lot of people...)

Upvoted because of the enormous help and for unexpectedly finding a fellow Metroid fan. Thank you very much, I wish you all the best!

Works fine! Thanks man. Really don't know why this error occured suddenly, yesterday it was all fine and then suddenly - no audio.

Wow! I didn't think VLC was actually for converting files as well! Sweet!

Worked flawlessly. I am using Open Broadcaster Software Studio Version and Vegas 12.0. Couldn't get my audio tracks to show up, even when only using 1. Now when I load it up, all audio tracks show! Thank you.

no lie this was bugging the hell out of me and this actually worked! Thanks man really appreciated!

Thank you! I spent hours searching for solution, changing settings, reinstalling Vegas Pro 11, almost everything. This solved problem :)

This tutorial saved me a lot of time and anxiety for a stream highlight I was editing! Thank you so much for making this.

Dang this actually worked! Very surprised at something so simple lol. Nice job!