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Posted by MS on 10/05/29 11:45
xyuxyu@gmail.com emailed this:
> Hi there - I wonder if someone can help me with this. Our band have
> made a DVD but we've lost one of the original MPG files for one of the
> songs, so I want to grab the file back off the DVD and put it back on
> the computer in MPG format. How do I do this? I've had a look on the
> DVD and the video is there in these .VOB files. I have Ulead
> Videostudio 8 and VLC Media player 0.8.2, which I've tried. ULead can't
> open .VOB files. I also have a video camera and tried doing video
> capture by plugging my DVD player into the camera then the camera into
> the PC. It captures from the camera just fine, but doesn't pick up a
> video signal from the DVD player.
>
> I tried one of the FAQs for this, but couldn't find an answer. There
> must be a simple way using software, I'm sure - anybody know how to
> grab video from a DVD and put it into a file in Windows? Nb. I have a
> DVD writer in my PC.
>
> Thanks in advance,
>
> John (Glasgow, Scotland)
Hi John,
The info. about renaming the files as mpg is not a good way to do this.
Here is what you should do.
1. Copy all the files from the DVD onto your hard disk (make a new folder
for them). NOTE If your DVD has been copyright protected use DVD Decrypter
to copy the files to your hard disk, info. on DVD Decrypter can be found
here: http://www.videohelp.com/tools?tool=DVD_Decrypter
2. While they're copying (it will take a while) download VobEdit 0.6 from
here:
http://www.videohelp.com/download/Vobedit06.zip
Homepage: http://www.ifoedit.com/
It is free software and requires no installation, just extract vobedit.exe
from the zip and run it.
READ 3. CAREFULLY.
3. When a DVD is compiled all the video and audio and subtitles are
combined together (called multiplexing) into sequences of VOB files, a VOB
file has a max size of 1GB which is why you get a sequence. Each VOB file
will usually contain a MPEG2 video stream, one or more audio streams, and,
if appropriate, one or more subtitle streams. VobEdit will allow you to
extract these streams into separate files (video, audio, etc).
A DVD can have multiple 'tracks' on it (nothing to do with an audio track,
just a term used for a specific sequence of VOB files on a DVD). So your
DVD may have VOB files named something like this:
VTS_01_1.VOB -- track 1, first in sequence
VTS_01_2.VOB -- track 1, second in sequence
VTS_01_3.VOB -- track 1, third in sequence
VTS_02_1.VOB -- track 2, first in sequence
VTS_02_2.VOB -- track 2, second in sequence
VTS_03_1.VOB -- track 3, first in sequence
VTS_03_2.VOB -- track 3, second in sequence
The first number of a VOB file sequence is the DVD track number, the
second number specifies the ordering.
Since yours is a music DVD (IE. not as long as a movie) each DVD track may
have only one VOB file, so you may have VTS_01_1.VOB, VTS_02_1.VOB,
VTS_03_1.VOB or everything on the DVD may be contained in just one DVD
track; VTS_01_1.VOB, VTS_01_2.VOB, VTS_01_3.VOB, VTS_01_4.VOB,
VTS_01_5.VOB. It depends on how the person who made the DVD structured it.
4. You are only after the data of one of the songs but which DVD track is
it on? To find out load the first VOB file of each VOB sequence into VLC
and see if it's the correct video. EG. Try VTS_01_1.VOB then VTS_02_1.VOB
etc. If the correct video is in VTS_02_1.VOB then you know you're after
the second DVD track. If your DVD only has one track you'll just have to
extract it all and later on find where the song's video starts and stops
in the one long video file of all the video on the DVD.
5. Extracting the separate files (video, audio, etc) from the VOB files is
called demultiplexing. Run vobedit.exe and click 'open' in the bottom left
corner, then navigate to the folder that has your DVD's VOB files. If you
established which track has your video in it open the first VOB file of
that sequence of VOB files. EG. VTS_02_1.VOB if you only have one DVD
track on the DVD just open VTS_01_1.VOB. NOTE you will NOT need to open
further VOB files in the sequence, just the first, VobEdit will
automatically move through the sequence of VOBs. So if you open
VTS_02_1.VOB it will know to do VTS_02_2.VOB and VTS_02_3.VOB as well if
they exist.
6. When you open the VOB file a whole load of info. will be displayed in
VobEdit. Now click on 'demux' also near the bottom left corner and a
dialog will pop up. All the boxes will be unticked, now JUST tick 'demux
all video streams', 'demux all audio streams' and 'demux all subp
[subtitle] streams' (DO NOT TICK ANYTHING ELSE) and click 'OK'. A 'save
as' dialog will pop up, so just choose a new folder to save the
demultiplxed files into and the demultiplxing will start (it will take a
while to finish).
7. The folder you just chose will now have a .m2v file which is MPEG2
video, a .ac3 dolby stereo file (or a different extension depending what
audio format is on the DVD) and .sup files if there are subtitles on the
DVD. [There may be more than one audio file if there are more than one in
the VOBs --not likely on a music DVD].
8. The .m2v file can be opened by any video playing software, so have a
look at it and see if you've got the right video. Note that VLC often does
not display the correct time info. for a video file. BS Player has a free
version which is pretty good, see here: http://www.bsplayer.org/
That's it -- good luck !!
Hope this helps,
MS (or as my Scottish cousin calls me 'The Sassenach')
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