I have an avi file which I burned to DVD and the sound wasn't loud enough. So I put it into VirtualDub to increase the sound. The file audio was, Vdub told me: fraunhofer IIS mpeg layer-3 codec 48000hz 112kbps and Vdub didn't offer me that as an output format. It offered, for example: AC-3 ACM Codec 112kBit/s 48000 Hz Stereo MPEG Layer-3 56kBit/s 24000 Stereo DV Audio - PAL 48000 khz 16bit stereo and I just wouldn't know which would be the best choice. I don't understand the significance of the different parameters for my aim: producing a dvd. Perhaps it simply doesn't matter. I'm only interested in learning a little. And, before that choice - how about if I just leave it uncompressed and feed that file into the DVD producing software? That's Nero. Would that be a good choice? For the choice, which is the most important thing: to match the bits per second? Or to match the frequency? I note the frequency varies, unless they've made a mistake, between 24,000 Hz and 48,000,000 - i.e. 48kHz. That's enormous. DV Audio seems likely because it sounds like something designed for the DVD making job - it even chooses PAL which is what we have here. So I just don't know. any advice?
Install the Lame MP3 codec and select that from 'Compression'. You may as well select the same bitrate and frequency sampling as the input, because AFAIK any DVD authoring application is going to resample and encode the audio to DVD specs anyway - but I wouldn't swear to that. DVD audio is typically AC3 stereo at 48000Hz and whatever bitrate the program defaults to ~ 192kb/s is typical. http://users.tpg.com.au/mtam/install_lame.htm
