Is there a way to remove audio and subtitle tracks via the command line?

[MickM]

I'm using the command line version of avidemux (avidemux_cli) and a bash script to convert my huge library of DVD VOB structure movies into mkv format. I would like the conversion to also simply remove all the subtitles and only keep the English audio track (or whatever track I specify). Is there a way to do this using the command line?