@echo off
set binpath=%~dp0
if not exist "%binpath%\ffmpeg.exe" echo ffmpeg not found. exiting... & echo. & pause & exit 1
:do
if [%1]==[] goto noarg
"%binpath%\ffmpeg.exe" -i %1 -vn "%~dpn1.mp3"
IF %ERRORLEVEL% NEQ 0 pause
shift /1
if [%1] NEQ [] goto do
exit 0

:noarg
echo Usage: %~nx0 "video to convert.flv"
echo.
pause
exit