Cucusoft Ultimate Converter Suite converts all the media file to play on almost any portable device including iPod, iPod touch, iPod video nano, iPhone, Zune, PSP, video capable MP3 players, video capable mobile phones, and Pocket P.C., etc. Meanwhile, it can also support output almost any audio/video format including Video format(H264, MP4, WMV, AVI, MOV, RM, 3GP, flv, SWF, mpeg-1, mpeg-2, VCD, SVCD, DVD, etc.) and Audio format(AC3, AAC, MP2, MP3, MP4, RA, WMA, etc.).
You can try the vixy.net online converter, it has an option to strip the audio from a video and make it into an mp3 file.
you have to get a video converter that has that option.
http://www.youtube.com/watch?v=2BuzKwUF170
this may help
Cucusoft Ultimate Converter Suite converts all the media file to play on almost any portable device including iPod, iPod touch, iPod video nano, iPhone, Zune, PSP, video capable MP3 players, video capable mobile phones, and Pocket P.C., etc. Meanwhile, it can also support output almost any audio/video format including Video format(H264, MP4, WMV, AVI, MOV, RM, 3GP, flv, SWF, mpeg-1, mpeg-2, VCD, SVCD, DVD, etc.) and Audio format(AC3, AAC, MP2, MP3, MP4, RA, WMA, etc.).
Search it at http://www.google.com or get it here
http://totosoft.net/site/ipod-software/cucusoft-ultimate-dvd-video-converter-suite/prod_3.html