Error using command line to extract SUB/IDX files from a dvdsub track in MacOS

[nick]

I tried to run the attached CLI code to get the sub and idx files from a mkv movie file in MacOS 26, and it gave me the error message “Error: Unrecognized command line option ‘0:2’.”

Does anyone know how to fix this so I can extract the sub and idx files?

Thanks, Nick

[mbunkus]

Welcome!

As mkvextract can extract multiple types of content (attachments, chapters, tracks…), you need to tell it what type to extract before the what (the IDs). Correct would be:

mkvextract "source file name.mkv" tracks 2 destination.idx

[nick]

Thanks for the help. Am I doing it correctly, I get this error message now:

[mbunkus]

See the documentation, please. In short: no file ID necessary, only track IDs, as mkvextract cannot handle multiple source files at once (this is what differs from mkvmerge & why mkvmerge needs file IDs before track IDs).