How do demux VBR MP3 stream?

[ZZZERO]

Seems like this should be simple but I can't figure out how to do it or find any post explaining how. I have an avi with VBR mp3 audio. I want to demux the audio without altering it in any way. vdubmod demux does not do that. It takes about 15 minutes to demux and the result is a CBR mp3 file. I do not want to convert to CBR, WAV or any other format. I just want the mp3 audio file as it is - untouched, unaltered, and uncoverted. Can anyone help?

[Tuning]

VirtualdubMod is outputting the original mp3 file what ever its CBR or VBR. it cannot re-encode while demuxing. So your assumption is incorrect.

[ZZZERO]

Originally posted by Tuning
VirtualdubMod is outputting the original mp3 file what ever its CBR or VBR. it cannot re-encode while demuxing. So your assumption is incorrect.

It's not an assumption. I demuxed that way and the resulting file was not the original VBR mp3 audio track. Also, why would it take 15 minutes to demux the audio of a 2 hour movie if it is just simply demuxing? It should take 1 or 2 minutes to write the mp3 file.

[DSPguru]

i haven't tested this feature for quite a long time, but you can try your luck with BeSweet's payload mode. it should be able to extract the soundtrack from an avi without modifying anything.

[basiech]

Hello ZZZERO,

you can use the old nandub instead...
get it here: http://sourceforge.net/projects/ndub/

Open your AVI in nandub, then "File" -> "Save WAV..." this would only save the Audio in a file called *.wav (there's no recoding done) but it stays the real mp3-file -> you just have to rename the *.wav file to *.mp3 and that's it :-)

I have tried it a moment before with a VBR and it is a VBR after this...

Greetz
basiech