FreePBX sound file converter cmd script for a folder of wav files - requires ffmpeg in the path

gistfile1.txt

setlocal
@echo off
###############
# version 2.0 
# resamples and converts audio files to mono, saves as intermediate wave
# then converts to ulaw.
# for FreePBX-based PBX software
# intended for Asterisk 19+
###############

mkdir intermediates
mkdir ulaw

for %%f in (*.wav) do (
 ffmpeg -i "%%f" -ac 1 -ar 8000 "intermediates/%%~nf.wav"
 )

echo press key to contine generating uLaw files

for %%f in (intermediates/*.wav) do (
 ffmpeg -i "%%f" -f mulaw "ulaw/%%~nf.ulaw"
 )
echo Press any key to verify that files were generated
dir intermediates
dir ulaw
pause check that files have been generated and press any key to exit.
endlocal