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Originally Posted by tebasuna51

Try this:

for %%a in (*.mkv) do (
    "C:\Program Files\eac3to\eac3to.exe" "%%a" 2: "%%a.ac3"
    "C:\Program Files\MKVtoolnix\mkvmerge.exe" -o "%%a.AC3.mkv" -d 1 --compression 1:none -A "%%a" -a 0 --compression 0:none "%%a.ac3"
    del %%a.ac3
)
pause

Thanks. The code works, but I need help modifing it. I am new to mkvmerge cli, I ususally use the gui.

Your script removes the dts track. I need the following:
Keep the dts track, mark for english, set as default and make sure no compression is set.
Add the ac3 track, mark for english, no default and make sure no compression is set.
(anything else I am missing)

I think that is it. Thanks for your help.