Batch audio append 5 secs on init & end.bat

@ECHO OFF
REM ########################################################################
REM  Created by DouglasAntunes
REM  Find updated script on https://gist.github.com/DouglasAntunes
REM ########################################################################
REM     Folder Structure:
REM         original       :input for .wav to append 5secs of silence on init & end of file.
REM         converted      :output
REM     Folder Root:
REM         This Batch & folders listed above
REM     Require ffmpeg registered on PATH variable

ECHO ### Appending 5secs of silence on WAV files ###
ECHO.

FOR /R .\original\ %%G IN (*) DO (
    ffmpeg -f lavfi -t 5 -i anullsrc=channel_layout=stereo:sample_rate=44100 -i "%%~fG" -filter_complex "[0:a][1:a][0:a]concat=n=3:v=0:a=1" "%~dp0converted\%%~nxG"
)

ECHO.
ECHO ## DONE. ###
PAUSE