Open IFO File

IFO file extension is used by InFOrmation files DVD video disks. These files contain information about the number of layout of the movie chapters, number of different audio streams and subtitle languages. IFO files consist of entries. Most common entry type is PGC (ProGram chain) which describes sequences for different versions of the movie, commentary and bonus material located on the disk.

While it is not possible to open IFO files directly they are used by different DVD playback programs like WinDVD, Cyberlink PowerDVD etc. These files are also read by DVD backup software when it copies video data to other DVD or hard-drive. If optical media that contains the IFO file becomes damaged player would attempt to read the same data from backup files that have file extension BUP. Once BUP files become damaged as well the disk becomes completely unreadable.