If not, you can try EaseFab Video Converter Ultimate, which is a dedicated VOB file transcoder for desktop. If you have a video encoding tool installed on your computer, you can use it to convert VOB to MP4 for Plex. However, we don't suggest users do so since the way always fails. Some users changed the file extension from. Get An Easy-to-use Tool to Convert VOB to Plex Compatible Formats If you have no idea about that, you can follow this simple tutorial to get the job done. vob files with Plex, you may have to convert VOB to any of Plex supported formats (MP4 format is recommended).
And Plex doesn't support transcoding VOB files directly. At present, Plex doesn't support the use of VOB or VIDEO_TS folders that have VOB files. It can wrap up digital video, audio, subtitles, DVD menus, and navigation contents all together into a stream form. VOB, the abbreviation of Video Object, is a media container format for DVD video. I should say it sees the folder that contains the VOB file but comes back as empty. Not sure what the issue is here and I cant see any obvious setting.
Everything went well and I can see my movie library barring any movies that are in the VOB format.
I have recently changed PC's so had to install Plex. To do this, you may have to convert VOB to a format compatible with Plex like MP4, AVI, MOV, etc. Plex can't directly play VOB media files.