Inside of a VOB file there is an MPEG-2 stream. It is a part of the DVD file structure and stored in the VIDEO_TS directory. Q: 'Hello, when I try to force-open a VOB file with QuickTime Player (Mac OS X 10.4.1, QT 7 Pro) I get the message 'QuickTime cannot open the file: VTS_02_2.VOB', it is not a file that QuickTime understands? Perhaps the MPEG-2 (or some other non-standard) component is required as well?'Īs we all know, the VOB stands for 'Video Object' as defined in DVD specifications. How to Play VOB Files in QuickTime Player?