convert mkv's

echo off
for %%f in (*x264*.mkv) do (call :convertit "%%f"
)
goto :EOF

:convertit
setlocal ENABLEDELAYEDEXPANSION
set input=%~1
set end=ReEncode_BTV.mkv
set output=%input:x264=HEVC%
set endbit=%output:*HEVC-=%
call set output=%%output:!endbit!=!end!%%
set qual=18
ffmpeg -i "%input%" -metadata title="%output%" -c:v hevc_nvenc -rc constqp -cq %qual% -rc-lookahead 32 -g 600 -c:a copy -c:s copy "%output%"