VOB specs

mario_a · 9th April 2002, 14:28

Hi,

Is there any place, where I can download the specifications for the format of VOB files, in pdf, htm, text, or any other format?

Thanks,
Mario

P.S. Please don't ask me to order them ,coz I can't afford them.

LigH · 10th April 2002, 08:34

A few years ago, I found some pre-release documents about the MPEG standards as Mac-RTF files on an FTP server; I guess I still have them - give me a bit time and I'll try to upload them somewhere.

(You can try to look for yourself for documents with the ISO/IEC standard numbers 11172 or 13818 in their filename; looking briefly, I had no success today.)

mario_a · 10th April 2002, 12:55

LigH,

Thanx for the excellent tip. I found 13818-1 and 13818-2 in .pdf format at the following urls respectively:

http://www.cdaniel.de/download/is138181.pdf

http://www.cdaniel.de/download/is138182.pdf

You also mentioned ISO-SEC 11172 (I tried searching, but couldn't find it), which I think are the specs for MPEG-1. Are those relevant to VOB format, since DVD is MPEG-2?

Thanks for your time,
Mario

mario_a · 10th April 2002, 13:10

These documents seem to be a bit dated , though ( circa 1995).
Have the specifications changed a lot since then?

Mario

LigH · 10th April 2002, 13:43

Those specs won't have changed alot... the most important information you can find there is the general MPEG file format, e.g. how multiple streams are stored, which streams are defined by the MPEG standard a.s.o. - VOB files so far are MPEG system streams, but they are restricted on one hand (e.g. max. bitrate, max. stream count per stream type, block size at 2 KB) and enhanced on the other (e.g. using private streams for direct digital sound or for subtitles is not part of the MPEG specs).

I once released here in this forum sources of my MPEG file scanner called MPEGWALK, it's in Delphi, therefore quite human-readable; I hope it helps you a bit further as well:

http://forum.doom9.org/showthread.php?s=&threadid=11856

LigH · 9th July 2002, 17:45

I just stumbled over the old drafts I mentioned, and converted them to PDF format and packaged them together. They are available here:

http://www.ligh.de/software/13818.rar (RAR3)
http://www.ligh.de/software/13818.ace (ACE2)

Please note: They are only drafts (unagreed specs), so the current specs might be different. They are even older than the other ones linked earlier in this thread, they were written in 1994. Also, these documents have been converted from an old MacWord format to the PC platform. Therefore, it is very likely that several parts are non-readable, displayed wrong or misinterpretable. Please do not rely on what you read only there!

9th April 2002, 14:28	#1 \| Link
mario_a Registered User Join Date: Feb 2002 Posts: 27	VOB specs Hi, Is there any place, where I can download the specifications for the format of VOB files, in pdf, htm, text, or any other format? Thanks, Mario P.S. Please don't ask me to order them ,coz I can't afford them.

10th April 2002, 12:55	#3 \| Link
mario_a Registered User Join Date: Feb 2002 Posts: 27	Thanx LigH, Thanx for the excellent tip. I found 13818-1 and 13818-2 in .pdf format at the following urls respectively: http://www.cdaniel.de/download/is138181.pdf http://www.cdaniel.de/download/is138182.pdf You also mentioned ISO-SEC 11172 (I tried searching, but couldn't find it), which I think are the specs for MPEG-1. Are those relevant to VOB format, since DVD is MPEG-2? Thanks for your time, Mario

10th April 2002, 13:10	#4 \| Link
mario_a Registered User Join Date: Feb 2002 Posts: 27	Out of date? These documents seem to be a bit dated , though ( circa 1995). Have the specifications changed a lot since then? Mario

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10th April 2002, 08:34	#2 \| Link
LigH German doom9/Gleitz SuMo Join Date: Oct 2001 Location: Germany, Gardelegen Posts: 1,464	A few years ago, I found some pre-release documents about the MPEG standards as Mac-RTF files on an FTP server; I guess I still have them - give me a bit time and I'll try to upload them somewhere. (You can try to look for yourself for documents with the ISO/IEC standard numbers 11172 or 13818 in their filename; looking briefly, I had no success today.)

10th April 2002, 13:43	#5 \| Link
LigH German doom9/Gleitz SuMo Join Date: Oct 2001 Location: Germany, Gardelegen Posts: 1,464	Those specs won't have changed alot... the most important information you can find there is the general MPEG file format, e.g. how multiple streams are stored, which streams are defined by the MPEG standard a.s.o. - VOB files so far are MPEG system streams, but they are restricted on one hand (e.g. max. bitrate, max. stream count per stream type, block size at 2 KB) and enhanced on the other (e.g. using private streams for direct digital sound or for subtitles is not part of the MPEG specs). I once released here in this forum sources of my MPEG file scanner called MPEGWALK, it's in Delphi, therefore quite human-readable; I hope it helps you a bit further as well: http://forum.doom9.org/showthread.php?s=&threadid=11856

9th July 2002, 17:45	#6 \| Link
LigH German doom9/Gleitz SuMo Join Date: Oct 2001 Location: Germany, Gardelegen Posts: 1,464	I just stumbled over the old drafts I mentioned, and converted them to PDF format and packaged them together. They are available here: http://www.ligh.de/software/13818.rar (RAR3) http://www.ligh.de/software/13818.ace (ACE2) Please note: They are only drafts (unagreed specs), so the current specs might be different. They are even older than the other ones linked earlier in this thread, they were written in 1994. Also, these documents have been converted from an old MacWord format to the PC platform. Therefore, it is very likely that several parts are non-readable, displayed wrong or misinterpretable. Please do not rely on what you read only there!