I created a bat file with the following code, batch render
but the code didn't work

This I use cod

ffmpeg -loop 1 -i filtre.png -i a.mp4 -filter_complex "[1:v]scale=627:-1[fg];[0:v][fg]overlay=(W-w)/2H-h)/2hortest=1" output.mp4

This is bat code

@echo off
set /A nfile=0
xcopy /T %1 cikti\
for /R %1 %%v in (Video\*.mp4, video\*.avi, video\*.mp3, video\*.flv, video\*.mkv) do (

bin\ffmpeg -i "%%v" ffmpeg -loop 1 -i filtre.png -i a.mp4 -filter_complex "[1:v]scale=627:-1[fg];[0:v][fg]overlay=(W-w)/2H-h)/2hortest=1" -preset ultrafast "Render\%%~nv.mp4"

set /A nfile+=1
)

I haven't been able to run the code,
I'd appreciate if you can help, thanks, regards