set start=1
set end=5
set path=K:\Encoding\Bleach
set program="K:\tools\MeGUI 0.3.5.0\tools\x264\vfw4x264.exe"

:loop
set /a loopend=%end%+1

%program% --preset whatever --output "%path%\%start%\%start%.mp4" "%path%\%start%\%start%.avs"

set /a start=%start%+1
if not %start%==%loopend% goto loop