For the last few builds (maybe last 5 or 6), including the most recent 5.2.0, DVDfab has been making lots of mistakes:
Subtitles rip ok, but when i try to remux my mp4 and subtitle files into an mkv, I get errors from mkvmux saying “subtitle stream doesnt contain any tracks”. This has always worked well until recently.
Aspect ratio is hit and miss. Often the video looks squeezed, even though it looked fine when i preivewed it in DVDfab’s resolution settings.
I cant be sure until i test on another computer, but it looks like some of the files audio and video arent in synch.