I was reading: https://wiki.videolan.org/How_to_Batch_Encode/
and what is correct line for my sytuation?:
CALL "C:\Program Files\VideoLAN\VLC\vlc" -I dummy -vvv %1 --sout=#transcode{acodec="mpga",ab="512","channels=2"}:standard{access="file",mux="raw",dst="%_commanm%.mp3"} vlc://quit
GOTO :eof