Set filename as variable in BATCH - batch-file

Question

Am new to this so hope someone can assist a novice. Cannot locate the answer so far. Essentially I am trying to create a watch folder which picks up new .MXF files, runs a specific command line application and renames the new file with the original filename plus _new.
#echo off
:loop
if exist "C:\Input\*.mxf" (
for %%a in ("C:\Input\*.mxf") do (
C:\BMX\bmxtranswrap -o C:\Output\NEW.mxf -t as11op1a -y 09:59:50:00 --afd 10 --pass-anc all -anc-max 2048 "%%a"
ping -n 5 localhost >nul
del "%%a"
)
)
ping -n 5 localhost >nul
goto :loop
I originally tried using %~n1 command to pass through the name which works in a CMD script I have.
C:\BMX\bmxtranswrap -o C:\Output\%~n1_NEW.mxf -t as11op1a -y 09:59:50:00 --afd 10 --pass-anc all -anc-max 2048 "%%a"
This doesn't work however. If there is a command I am missing to pass through the source filename then please let me know.
Many thanks.

Answer 1

You need to extract the filename without the extension in order to use it as a variable in the new name.
To get the filename you can use:
%%~ni
This should work:
#echo off
if exist "C:\Input\*.mxf" (
FOR %%i IN ("c:\Input\*.mxf") DO (
REM ECHO %%~ni - This is the filename without the extensoion for the new file
C:\BMX\bmxtranswrap -o C:\Output\%%~ni_new.mxf -t as11op1a -y 09:59:50:00 --afd 10 --pass-anc all -anc-max 2048 %%i
ping -n 5 localhost >nul
del %%i
)
)
NOTE:
I've tested the above code without the bmxtranswrap line and the new filenames were displayed as expected: test_new.mxf and test2_new.mxf