Noah Foster57 said:There’s this really great little program called Super—you just click "disable video" and pick whatever audio format you want (WAV is your best bet for quality, though MP3 takes up way less space). If you use Super to strip the audio away from the video, you can then pull them into an editor—maybe Premiere Pro, Edius, or even Vegas—to work your magic.
http://www.afterdawn.com/software/au...ideo/super.cfm
Personally, I think pulling the audio out as an MP3 isn't a bad move at all—and hey, you can actually do that using FormatFactory, which is totally free!
Then, you could boost the volume using MP3 Gain (another freebie!), and finally, use the Direct Stream Copy mode in Virtualdub (also free!) to swap out the old audio track with your newly polished one.
Sure, you could technically merge everything back together using a standard video editor like MovieMaker, PowerDirector, or Corel VideoStudio... but here's the catch: those programs tend to re-encode the entire video file while they're at it. But with the Virtualdub method? You don't need to convert a single thing! You just check the box for "direct stream copy" under the video settings, and you're golden.