Song 2 Webm

@echo off
set bitrate=128

if "%~1"=="" goto :help
set "file=%~1"
set "image=%~2"
if not exist "%image%" goto :set_cover
goto :webm

:help
echo Usage: %0 SONG [IMAGE]
goto :quit

:set_cover
ffmpeg -y -i "%file%" -an -vcodec copy "tmp.cover.jpg"
if exist "tmp.cover.jpg" (
    set "image=tmp.cover.jpg"
) else (
    set "image=cover.jpg"
)

:webm
for %%f in ( "%file%" ) do (
    set filename=%%~nf
)

ffprobe "%file%" 2>1.fftmp
findstr /ric:" *TITLE *: " 1.fftmp >2.fftmp
set /p title=<2.fftmp
set "title=%title:~22%"

if exist "%image%" (
    ffmpeg -i "%image%" -i "%file%" -c:v libvpx-vp9 -crf 20 -vf scale=-1:480 -pix_fmt yuv420p -c:a libopus -b:a %bitrate%K -f webm -metadata title="%title%" "%filename%.webm"
) else (
    ffmpeg -i "%file%" -c:v libvpx-vp9 -crf 20 -vf scale=-1:480 -pix_fmt yuv420p -c:a libopus -b:a %bitrate%K -f webm -metadata title="%title%" "%filename%.webm"
)

del *.fftmp
if exist tmp.cover.jpg (
    del tmp.cover.jpg
)
:quit