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Topic:
Can You Help?
This thread has 18 replies. Displaying posts 16 through 19.
Post 16 made on Monday August 7, 2006 at 11:38
barlow
Active Member
Joined:
Posts:
September 2004
535
"bad sectors is one the schemes that is removed with most programs"

So how does my lowly cheapy ENTVIDIO Playback only DVD player not get hung up be a bad sector?

-DonB
Post 17 made on Monday August 7, 2006 at 12:04
OTAHD
Super Member
Joined:
Posts:
October 2005
4,679
I think it's got something to do with the fact that players use the menu info files to be directed to the movie, skipping over the bad sectors, but when ripping it the entire path is looked for.
LET'S GO BUFFALO!!!
Post 18 made on Monday August 7, 2006 at 12:27
barlow
Active Member
Joined:
Posts:
September 2004
535
" think it's got something to do with the fact that players use the menu info files to be directed to the movie, skipping over the bad sectors, but when ripping it the entire path is looked for."

OTAHD, Thanks that helps explain it. Sorry I have to ask such wierd questions!

-DonB2
Post 19 made on Wednesday August 9, 2006 at 14:46
erock1
Long Time Member
Joined:
Posts:
August 2005
218
On August 7, 2006 at 12:27, barlow said...
|
Thanks that helps explain it. Sorry I have
to ask such wierd questions!

-DonB2

DonB2
no need to be sorry and your questions aren't wierd at all. They are very valid. The structure of commercial DVDs are very interesting (at least IMHO they are).

If you look at the DVD structure you will see 2 directories. There is a Video_TS where all the video files are and an Audio_TS directory with the DVD audio. Inside the Video_TS directory you will find .IFO .BUP and .VOB files The .ifo files are the information files that OTAHD indicated above. The .ifo files provide direction or navigation instruction to the player so it knows where the actual movie and audio files are and when to play them including linking to the DVD menus and chapters. Kind of like bookmarks. Like OTAH said, your player reads the .ifo and gathers the components needed to play. The Sony problem is called "ARccOS" which places instructions ( bad sectors) to video objects that do not really exist. Your DVD STB no matter how old will just skip over them where most ripping programs like Shrink, etc, will try to find them and then error out.

Then you have .BUP files. .BUPs are just backup files of the .ifo information. BTW, both .ifo & .bup files are not encrypted. Talk about wierd, if you delete or don't include any of the .bup files the movie won't play. I'm still not sure why. Anyone that knows, please feel free to chime in.

Next and most important are the .VOB files or video objects. These are the actual movie files that can or do contain many different streams multiplexed together (video, audio, sub-titles, etc.). You can copy a .VOB and just rename it with an .MPEG or .MPG extension and it will play on your PC.

If you're really interested there are some wonderful explanations and papers at doom9.net. definately worth checking out.

Last edited by erock1 on August 10, 2006 13:16.
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