‘TAudioConverter’ is a free audio converter (a front-end that uses ‘ffmpeg’ for the actual encoding) that you can use to convert a huge number of audio files into few other popular formats with ease. It also has an option that lets you direct copy the audio stream without encoding (including extracting the audio stream of a multimedia file).
However, I could not get it to work for some reason (it’s a new utility, so perhaps it’s bug), but you can still load a video file and extract the audio file by converting it (at lest). You can change the bitrate (constant, average) , sample rate, channels, normalize (audio gaining) and supports converting into the below formats by using it.
*. MP3, Ogg Vorbis, FLAC, Nero AAC (disabled by default), FAAC, QAAC, Aften and FHG AAC.
I tested it by converting various audio files (including converting the audio stream of a video file) into the above formats and had no issues except while trying to change the bitrate for Ogg Vorbis codec, it was a bit troublesome.
Like many other codecs, Ogg Vorbis lets you enter either a bitrate or a ‘quality’ setting presets (ranging from 0-10) while encoding.
But if I enter a bitrate manually, then ‘TAudioConverter’ still uses the bitrate defined by the ‘quality’ preset. For instance, if my last used ‘quality’ preset used a bit-rate of 320 Kbps, then even if I enter a bit-rate of 32 Kbps, then the encoder will still use 320 Kbps. So I guess it’s also a bug. But other than this and the audio extracting issue, it did work pretty decently.
You can change the output directory, add files individually or folders, manually enable the ‘Nero AAC’ codec support, get a detailed information about a file and it doesn’t require any installation (just extract it to somewhere and run) so you can use it as a portable utility as well.
If you wanna give it a try, then please get it from this page.
Again, please remember that it’s a new application so don’t be surprised if you come across a bug or two ;-).