www.makemkv.com

They're part of the video stream, so unless makeMKV were updated to specifically discard them (thereby modifying the video stream), it's not possible. Oh OK. I had thought that as the closed captions didn't appear when playing dvd through VLC player they were separate to the actual video like subti...

Slightly off topic
How do I stop Closed Captions from being encoded into my output mkv file?
Cheers