ffmpeg and yet more ffmpeg...

The thing never ends...
Still trying to rip a DVD with burnt in subs that plays Ok on the Roku 3...

This one works, creates an mkv file (of about 800 MB) with subs on it, but, the video doesn't play on the Roku 3 (it obviously plays on VLC, even the embedded subs):
/usr/local/bin/ffmpeg/ffmpeg -fflags +genpts\
 -i media/hictio/THEMOVIE_S1_D1/VIDEO_TS/VTS_06_1.VOB\
 -c:v copy -c:a copy -c:s copy /media/hictio/Lexar/THEMOVIE_S1_D1-TS_06_1.mkv

This one creates an mkv file (of nearly 3 GB [get a hold of that, dude!!!!]) but without subs on it; it plays ok on Roku3, even the different language audio tracks:
/usr/local/bin/ffmpeg/ffmpeg -i \
/media/hictio/THEMOVIE_S1_D1/VIDEO_TS/VTS_06_1.VOB\
 -map 0:v -map 0:a -c:v libx264 -crf 18 -vf yadif -c:a flac\
 /media/hictio/Lexar/THEMOVIE_S1_D1-TS_06_1.mkv