mkv2mp4.cmd

@echo off
setlocal DisableDelayedExpansion

if "%~1" EQU "/DontCheckDrapDrop" (
    shift
) else (
    call :IsDragDrop && (
        call "%~f0" /DontCheckDrapDrop %%@*%%
        exit
    )    
)

:: Process batch file arguments as you normally do 
setlocal EnableDelayedExpansion
echo cmdcmdline=!cmdcmdline!
endlocal

echo %%*=%*
if defined @* echo @*=%@*%

for %%A in (%@*%) do (
	ffmpeg.exe -i "%%~A" -map 0:0 -map 0:1 -map 0:2 -map 0:3 -map 0:4 -map 0:5 -map 0:6 -c:v copy -c:a:0 copy -c:a:1 copy -c:a:2 copy -c:a:3 copy -c:a:4 copy -c:a:5 copy -c:a:6 copy "%%~nA.mp4"
)

pause
exit /b

:: IsDragDrop routine
:: Checks if the batch file is directly lanched through Windows Explorer
:: then Processes batch file arguments which are passed by Drag'n'Drop,
:: rebuilds a safe variant of the arguments list suitable to be passed and processed
:: in a batch script and returns the processed args in the environment variable
:: that is specified by the caller or uses @* as default variable if non is specified.
:: ErrorLevel: 0 - If launched through explorer. 1 - Otherwise (Will not parse arguments)
:IsDragDrop [retVar=@*]
setlocal
set "Esc="
set "ParentDelayIsOff=!"

setlocal DisableDelayedExpansion
if "%~1"=="" (set "ret=@*") else set "ret=%~1"
set "Args="
set "qsub=?"

:: Used for emphasis purposes
set "SPACE= "

setlocal EnableDelayedExpansion
set "cmdline=!cmdcmdline!"
set ^"ExplorerCheck=!cmdline:%SystemRoot%\system32\cmd.exe /c ^""%~f0"=!^"
if "!cmdline!"=="!ExplorerCheck!" (
    set ^"ExplorerCheck=!cmdline:"%SystemRoot%\system32\cmd.exe" /c ^""%~f0"=!^"
    if "!cmdline!"=="!ExplorerCheck!" exit /b 1
)
set "ExplorerCheck="
set ^"cmdline=!cmdline:*"%~f0"=!^"
set "cmdline=!cmdline:~0,-1!"
if defined cmdline (
    if not defined ParentDelayIsOff (
        if "!cmdline!" NEQ "!cmdline:*!=!" set "Esc=1"
    )
    set ^"cmdline=!cmdline:"=%qsub%!"
)
(
    endlocal & set "Esc=%Esc%"
    for /F "tokens=*" %%A in ("%SPACE% %cmdline%") do (
        set "cmdline=%%A"
    )
)
if not defined cmdline endlocal & endlocal & set "%ret%=" & exit /b 0

:IsDragDrop.ParseArgs
if "%cmdline:~0,1%"=="%qsub%" (set "dlm=%qsub%") else set "dlm= "
:: Using '%%?' as FOR /F variable to not mess with the file names that contain '%'
for /F "delims=%dlm%" %%? in ("%cmdline%") do (
    set ^"Args=%Args% "%%?"^"
    setlocal EnableDelayedExpansion
    set "cmdline=!cmdline:*%dlm: =%%%?%dlm: =%=!"
)
(
    endlocal
    for /F "tokens=*" %%A in ("%SPACE% %cmdline%") do (
        set "cmdline=%%A"
    )
)
if defined cmdline goto :IsDragDrop.ParseArgs

if defined Esc (
    set ^"Args=%Args:^=^^%^"
)
if defined Esc (
    set ^"Args=%Args:!=^!%^"
)
(
    endlocal & endlocal
    set ^"%ret%=%Args%^"
    exit /b 0
)