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[refriedfood]

This only works if you A) have those parameters in your options file, and B) if the file you're trying to batch is MKV already. If you want to batch an entire directory from say, .ts to .mkv. This simply doesn't do that.

This would actually work better:
for %%A IN (*.ts) do ( D:\path\to\MKVToolNix\mkvmerge.exe -o ".\out\%%~nA.mkv" "%%~A") pause
Inside a batch (.bat) file and put into the directory you're converting the files to. *.ts can be any video format mkvmerge accepts, i.e. *.mp4 - then baddaboom-badda-bing, all your new mkv's are in the out directory.

[Barbait]

Could you implement that?

[Serede]

For the time being, replacing the extension in the script doesn't seem that much of a hassle to me.

The first generalizing solution that comes to mind is passing the list of files as arguments to the script, so that you can use glob patterns from batch or powershell.

I might give it a look whenever I have the time. Meanwhile, pull requests are appreciated 😉