TopBottom dual input

@echo off
echo video convert xh264
echo **************************
echo video codec : libxh264
echo **************************
echo.
set /p input1= Input Left File :
set /p input2= Input Right File :
set /p output= Output TopBottom File :


ffmpeg  -i "%input1%" -vf "[in] pad=iw:2*ih [left]; movie="%input2%" [right];[left][right] overlay=0:main_h/2 [out]" "%output%"
pause