) ▁ ▁Video ▁Title ▁Set ▁Menu ▁( V TS M ) ▁– ▁uses ▁" V TS _ zz _ 0 . V OB " ▁files ▁ ▁Container ▁▁ ▁Video , ▁audio , ▁sub title ▁and ▁navigation ▁streams ▁are ▁multiple x ed ▁and ▁stored ▁on ▁a ▁DVD - Video ▁disc ▁in ▁the ▁V OB ▁container ▁format ▁( Video ▁Object ). ▁V OB ▁is ▁based ▁on ▁the ▁M PE G ▁program ▁stream ▁format , ▁but ▁with ▁additional ▁limitations ▁and ▁specific ations ▁in ▁the ▁private ▁streams . ▁The ▁M PE G ▁program ▁stream ▁has ▁prov isions ▁for ▁non - standard ▁data ▁( as ▁AC - 3 , ▁D TS , ▁L PC M ▁or ▁subt it les ▁used ▁in ▁V OB ▁files ) ▁in ▁the ▁form ▁of ▁so - called ▁private ▁streams . ▁V OB ▁files ▁are ▁a ▁very ▁strict ▁subset ▁of ▁the ▁M PE G ▁program ▁stream ▁standard . ▁While ▁all ▁V OB ▁files ▁are ▁M PE G ▁program ▁streams , ▁not ▁all ▁M PE G ▁program ▁streams ▁comp ly ▁with ▁the ▁definition ▁for ▁a ▁V OB ▁file . ▁ ▁DVD ▁record ers ▁can ▁use ▁DVD - V R ▁or ▁DVD + V R ▁format ▁instead ▁of ▁DVD - Video . ▁DVD - V R ▁format ▁store ▁multiple x ed ▁audi ovis ual ▁content ▁in ▁V RO ▁containers . ▁V RO ▁file ▁is ▁an ▁equivalent ▁to ▁a ▁collection ▁of ▁DVD - Video ▁V OB ▁files . ▁Fragment ed ▁V RO ▁files ▁are ▁not ▁widely ▁supported ▁by ▁hardware ▁or ▁software ▁players ▁and ▁video ▁editing ▁software .