ffmpeg automate output=input filename in .bat (not cmd drag/drop)

[skh]

is there a way to automate the output filename in a regular ".bat" ?

I sometimes do things like adding audio tracks from another video, keep the audio of the original and change the container such as:

"%FFMPEG%" -i "C:\Test\Video1.mp4"  -i "C:\Test\Video2.mp4"  -map 0:v:0 -map 1:a:1 -map 0:a:1 -c:v copy -c:a copy -f matroska "C:\Test\Video-NEW.mkv"

which adds an audio track from a different video to the first video as the first audio track, keeps the original audio as a second track and changes the container to mkv.

I would love to automate the output command so that I only have to use one command for the output which just uses the input filename as an output filename (for example Video1.mp4.mkv) instead of specifying the output path and filename every time.

Of course drag and drop cmd isn't an option for this because you can't drag 2 or even more files into a "cmd" at the same time and expect it to know which -i comes when.

Is there a clever command for this? I read through all kinds of threads such as

https://forum.videohelp.com/threads/398507-Top10-Commands-for-Lossless-Video-manipulat...e)#post2592949
https://github.com/butterw/bShaders/blob/master/test_LimitedRange/ffm4b.bat
https://manpages.ubuntu.com/manpages/xenial/en/man1/ffmpeg.1.html
https://forum.videohelp.com/threads/399797-FFMpeg-Auto-output-Name-on-bat-Script-file

but they are all only refering to the drag and drop / cmd way "%FFMPEG%" -i %INPUTFILE%

which suggests


%1%.mp4
"%~dpnx1.mp4"
"%%~nf_New.mp4"

I tried those in my bat but they usually just let it create a ".mkv" file with no output name at all.

[JoeS99]

I have a template for ffmpeg batch files.
You can manipulate the output filename (in quotes). Play around with it.

REM -
mkdir Recode

for %%a in ("*.mkv") do call :my_function "%%a"
pause
exit

:my_function

ffmpeg -i "%~1" -map 0 -vcodec copy -scodec copy -acodec ac3 -b:a 384k "Recode\%~n1.mp4"

goto :eof

[jack_666]

set f_name=bla_bla_bla
"%FFMPEG%" -i "C:\Test\%f_name%.mp4"  -i "C:\Test\Video2.mp4"  -map 0:v:0 -map 1:a:1 -map 0:a:1 -c:v copy -c:a copy -f matroska "C:\Test\%f_name%.mkv"

[skh]

thanks I think I got it now -)