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The DVD hierarchy is like this: * VIDEO_TS.IFO VIDEO_TS.VOB VIDEO_TS.BUP: This is the information for the main menu, and the VMG (video manager) information file * The main menu is in the vob file * The bup file is a backup (copy) of the ifo file * The IFO is very important for determining how to play the movie. * it contains pointers to all the data locations in the VOB or set of VOBs * the data in the VOB is resilient to scratches and stuff, so it's not so bad if that gets scratched up * but if you lose an IFO... you're toast. * On the dvd is a collection of titles * Each title has a menu, and the vob title set. * Each title set has a main menu for the set and the ifo for the set * VTS_01_0.IFO VTS_01_0.VOB VTS_01_0.BUP that's the menu and the info for the set * Then, you get the data: VTS_01_[1-9].VOB * each of those files is only a gig, but that's a filesystem limit * in actuality, all the data is contiguous on the disc * and you load it from the first sector of the first vob in the set and keep reading * even further, everything from the first ifo in the set is contiguous on the disc. * (you need to know that, since alot of info is given in sectors) * in the vob set, it's split up in different ways * but probably the best way to think of it is as a collection of VOBUs * and then you can organize VOBUs into cells, cells into programs, ... * each VOBU is a collection of packs * a pack is 2048 bytes, the size of a sector on a DVD ---- |||||||| OMS || || CSS || IFO || MPEG2 Video || AC3 audio || || || |||| MPEG2 Systems || || |||||| UDF Filesystem || |||||||| CD-ROM/DVD-ROM device driver || |||||||| DVD-ROM drive ||
config = 0.000 total = 0.140 imports = 0.130
