So often we saw .VOB, .VRO, .IFO, .BUP, and .AOB files, yet we don’t have a clue what they are. Let me explain them to you one by one.

The .IFO files contain menus and other information about the video and audio. The .BUP files are backup copies of the .IFO files. The .VOB files (for DVD-Video) and .AOB files (for DVD-Audio) are MPEG-2 program streams with additional packets containing navigation and search information. How audio and video data are stored in specialized files is defined by the specifications of DVD-Video and DVD-Audio. Read More »