Definitions

grant9954 · Post by **grant9954** » Sat Sep 10, 2005 2:16 am

Hi all

Could somebody please define or explain VOB, IFO, and BUP file formats for me? I understand MPEG, WMV, DIVX etc. but not those.

Thanks

Post by **Ron P.** » Sat Sep 10, 2005 3:13 am

VOB files are DVD Video OBject files.
All DVD movies are stored in so-called VOB files. Vob files usually contain multiplexed Dolby Digital Audio and MPEG2 video. Vob Files are called as follows: vts_XX_y.vob where XX represents the title and Y the part of the title. There can be 99 titles and 10 parts, although VTS_XX_0.VOB does never contain any video, usually just menu or navigational information. There's 2 ways to find out which files contain the main movie: First: Play the movie in any DVD player and watch the LED on a standalone or the status window on a software player. Second: The main movie is the largest number of consecutively numbered VOB files. For instance it's vts_05_1.vob, vts_05_2.vob.... vts_05_8.vob (I haven't seen movies with 9 partial files but that doesn't mean that they don't exist).

IFO/BUP discription

IFO files contain the formatting information of the VOB files, which tells the DVD player exactly how the DVD should be played (eg. aspect ratio, subtitles, languages, menus etc...). BUP files are backups for IFO files, which are needed if the IFO files gets corrupted. If you rip the DVD without IFO files, then the VOB files may not play correctly, or may not even play at all. Similarly for conversion, IFO files are essential since video converters like FlasKMPEG (which supports IFO parsing) will need them if you want to encode videos, or fix multi-angle ripping problems.

Descriptions obtained from Audio Video Affair

Regards

grant9954 · Post by **grant9954** » Sat Sep 10, 2005 4:42 am

Thanks for the speedy reply Vidoman.
So basically these files are in the VIDEO_TS file and are of no use to me independantly outside of that file? ie: The file needs them but are really no use on there own?

AnimeChick · Post by **AnimeChick** » Sat Sep 10, 2005 6:59 am

You can import the .vob into Videostudio using the import DVD function. Point it to the Video_TS folder. This will bring the files in as mpeg 2.

Also, good description of the breakdown of the .vob is on Videohelp.com

grant9954 · Post by **grant9954** » Sat Sep 10, 2005 4:47 pm

Got it! Thank you both.