@ECHO OFF
SETLOCAL
PUSHD "%~dp0"
IF "%~1"=="" GOTO HELP
IF NOT EXIST webm MD webm
GOTO LOOP

:LOOP
SET FNAME=%~f1
node __frametools\framerate.js "%FNAME%" -v
SET /P BITRATE=Enter bitrate (ex: 700k): 
CHOICE /M Downscale
IF %ERRORLEVEL%==1 GOTO SCALE
SET SCALE=
GOTO CONV

:SCALE
SET /P W=Width (-1 for auto): 
SET /P H=Height (-1 for auto): 
SET SCALE=-vf scale=%W%:%H%
GOTO CONV

:CONV
FFMPEG -i "%FNAME%" -c:v libvpx-vp9 -crf 12 -b:v %BITRATE% %SCALE% -an "webm\%~n1.webm"

SHIFT
IF "%~1"=="" GOTO END
GOTO LOOP

:HELP
ECHO Help
GOTO END

:END
POPD
ENDLOCAL