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I rip the DVDs that I own to my hard disk using a straight-up 1:1 copy, ie to an ISO image. This works great usually, but for this specific DVD that I'm presently trying to rip, I'm being told that the DVD is literally 64GB in size. It's definitely not a BluRay disc, and I don't even have a BluRay drive, so that possibility is ruled out.

I'm not having any problems playing back the DVD file in VLC. I'm running Ubuntu 10.04 64bit. How on earth could it be a 64GB DVD?!? Isn't the max capacity of a DVD around 8 gigabytes? I don't even think that BluRay discs hold 64GB of data!

EDIT

When I ripped the DVD with dvdbackup, I kept receiving the following errors:

Error reading VTS_15_0.VOB at block 3391
padding 193 blocks
Error reading VTS_16_0.VOB at block 1999
padding 49 blocks
Error reading VTS_16_0.VOB at block 3391
padding 193 blocks
Error reading VTS_17_0.VOB at block 1999
padding 49 blocks
Error reading VTS_17_0.VOB at block 3391
padding 193 blocks
Error reading VTS_18_0.VOB at block 1999
padding 49 blocks
Error reading VTS_18_0.VOB at block 3391
padding 193 blocks
Error reading VTS_19_0.VOB at block 1999
padding 49 blocks

It seems like it's looping over the same blocks over and over again or having problems in each VOB file at the same point? That looks like a red flag to me, any ideas?

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4 Answers

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A DVD will never be that large. What could happen is that the disk advertises itself as being larger than it actually is (weird copy protection scheme), or that your OS has a bug reading that DVD, which happens more frequently that it may seem (I once got a 1 TB CD-R...).

Try to rip it anyway. The worst that could happen is that you fill your disk, which should be pretty easy to recover from.

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Dig through the DVD to check which files/directories are taking up the disk space

Use du -shc *

Also, did you try checking the DVD on a non-*nix system ?

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Here's a dump of DVD file sizes: pastebin.com/WNVqrNgm – TK Kocheran Jan 18 '11 at 16:45
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And no, I don't have access to a non-*nix system. – TK Kocheran Jan 18 '11 at 16:45
@TKKocheran that's crazy. Maybe it's a similar issue as on Windows: There's a "file size" and a "file size on the filesystem". You can blow the normal file size out of proportions and it will still not be that big on the file system. Maybe some kind of copy protection like others suggested – sinni800 Oct 21 '11 at 5:46
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If you are extracting the video in uncompressed format, that can blow up enormously the size of the video.

Uncompressed format does not in this case gain you much improvement in quality, since the source was already compressed on the DVD.

Blu-ray disc with dual layer can go up to 50 GB, although 100 GB have also been demonstrated.

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He said he was making ISO's, so no compression change. – Xr. Jan 18 '11 at 7:02
Yes, goal here is 1:1 copying. – TK Kocheran Jan 18 '11 at 7:03
@Xr: I would like first to know what his extraction software was, and whether the resulting 64GB iso was playable. – harrymc Jan 18 '11 at 7:06
Haven't actually finished a rip yet. Using dvdbackup then converting into an iso with genisoimage. – TK Kocheran Jan 18 '11 at 7:08
Just finished a rip and it definitely looks like it's putting out 64 gb of data. Please see the edited question above with some of the errors it put out. – TK Kocheran Jan 18 '11 at 16:08
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I think you need to add this entry (if its for real) into Wikipedia - http://en.wikipedia.org/wiki/DVD saying "Really Really Rare" just below the following below the picture

17.08 GB (double-sided, double-layer – rare)

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lol, could it possibly be some DVD obsfucation technique to deter people like me who like to make backups? It's a single-sided dvd, I have serious doubts that it's really that big. However, on playing most of the VOB files, it seems legit. Implausible, but legit. And who has 64gb of data to put on a simple movie DVD like this anyway!?! – TK Kocheran Jan 18 '11 at 6:58
Yes it is some kind of protection I guess. Try looking around what software can give you a workaround with this. (There are a lot of 'clickety-click' ones out there.) – Shiki Jan 18 '11 at 7:01
Any recommendations? I'm on linux, so I'm using dvdbackup. I can try using dd, but I assume that if it's crazy enough to fake its size, it's probably crazy enough to have CSS to prevent a dd. – TK Kocheran Jan 18 '11 at 7:07
try ogmrip, never failed me yet. – Sirex Jan 18 '11 at 8:05
Will do. See new edits above describing some errors I saw in the rip with dvdbackup last night, interesting stuff. – TK Kocheran Jan 18 '11 at 16:11
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