A useful line of code to convert VOB files to FLV in Linux
mencoder inputfile.VOB -of lavf -ovc lavc -lavcopts vcodec=flv:vbitrate=150 -ofps 25 -oac mp3lame -lameopts abr:br=32 -srate 22050 -vf scale=720 -o outputfile.flv
The “flv” format files can only support 8000, 22050 and 44100 I believe for the available -srate.
Found via http://wiki.soslug.org/wiki/vob_to_flv