OK I posted this question under anydvd but Chevron pointed out it belongs here. I want to emphasise in the first instance I'm not reporting a bug just trying to understand what's going on and showing my ignorance! So: on the disk Rome (the TV series), the episodes have optional background information subs concerning Roman history etc. These are text in a brown box with a little animation. From the actual bluray disk, if I play it from vlc and select the option from the disk menu they play fine. However when playing them, vlc does not show a sub track as active, and indeed it also does not appear on the list of sub tracks under codecs. Also, using procmon I can see that vlc has only the m2ts file open, there's no secret "other" file containing this track However, if I try to copy this title neither makemkv nor Clonebd shows me this "subtitle" track. So where does it live and how can I rip it??? Is it embedded in the video stream somehow? In that case, how can I play it back when it's in an mkv? Like I say, I just want in the first place to understand what's going on. Thanks to anyone who can educate me!