Can't detect a disk's second layer except in a real player

[BlackChakram]

So I've been ripping my Stargate SG-1 DVDs and have discovered that I'm getting a problem on only a handful of random disks that's leaving me stymied.

All the disks are dual layer. However, even though MakeMKV can report that there are two layers (PTP), it gives the disk capacity at only 3.42 Gb. Each episode rips at about 1.7 GB so I knew something was wrong as that only accounts for 2 episodes out of the 4 on each disk. Sure enough, even if I try to open the disks manually, I get errors on the 3rd and 4th episode of each disk. "Title {x} was skipped due to navigation error".

I then tried ImgBurn. Verifying the disk, I see right away that Layer 0 reports 100% sectors while Layer 1 says 0%.

I then tried DVD Decrypter. It definitely sees the disk capacity at over 7 GB and can see all the video_ts files, but fails when ripping.

Regardless of which program I use, I get errors akin to the PC trying to read sectors it thinks are out of bounds.

I began to suspect damage to the disk, so as a last resort, I dug out my old LG Blu-Ray player, connected it to the TV and played the disk. WORKS PERFECTLY. All 4 episodes.

So has anyone seen anything like this? It seems to be copy protection that fools every program into not understanding how to even access the second layer....

I've added a dump from MakeMKV

Code: Select all

Using LibreDrive mode (v06.3 id=7FA2657C7667)
Using direct disc access mode
Error 'Internal error - Input parameter is incorrect (489)' occurred while reading '/VIDEO_TS/VTS_02_1.VOB' at offset '0'
Error 'Internal error - Input parameter is incorrect (489)' occurred while reading '/VIDEO_TS/VTS_02_1.VOB' at offset '0'
Error 'Internal error - Input parameter is incorrect (489)' occurred while reading '/VIDEO_TS/VTS_03_1.VOB' at offset '0'
Error 'Internal error - Input parameter is incorrect (489)' occurred while reading '/VIDEO_TS/VTS_03_1.VOB' at offset '0'
Cells 1-1 were removed from title start
Title #1 was added (5 cell(s), 0:43:56)
Cells 1-1 were removed from title start
Title #2 was added (5 cell(s), 0:43:53)
Cells 1-2 were removed from title start
Title #3 declared length is 0:34:52 while its real length is 0:00:00 - assuming fake title
Fake cells occupy 32% of the title - assuming fake title
Title #5 in broken titleset was skipped
Title #6 in broken titleset was skipped
Title #7 in broken titleset was skipped
Title #8 in broken titleset was skipped
Title #9 in broken titleset was skipped
Operation successfully completed

[dcoke22]

Properly formatted DVD-Video uses Opposite Track Path (OTP). Only DVD-ROMS use Parallel Track Path (PTP).

If you really have dual layer PTP DVDs that are supposedly Stargate SG-1, I suspect they're counterfeit. I would expect most ripping software to expect a dual layer DVD to be OTP. Consequently, when things switch to the second layer, the ripper would be very confused since the second layer is backwards from what it would expect.

[Malapert]

I'm trying to rip season 7, disc 2. All seasons up to this point have had no problems. This disc set, I just opened from shrink wrap. It accepts two of the four titles on this disc but then gives this for the remaining two:

Title #2 declared length is 0:35:01 while its real length is 0:00:00 - assuming fake title
Cells 1-2 were removed from title start
Title #3 declared length is 0:34:57 while its real length is 0:00:00 - assuming fake title
Cells 1-1 were removed from title start

I'm going to try to rip it with an older dvd burner that I have but assuming I'll have the same issue. Any thoughts?
*note: Mine is not a Blu-ray disc. I tried another ripper and it couldn't read the disc at all.

[gkar_of_narn]

I don't know what O/S you are using but if you can download Nero Infotool, it's freeware and it gives you all the info about a disk. Copy protection (CSS), layers, OTP...etc...I use an ancient version (6) but it works fine on my old Windows XP system

[blind-s33r]

If they are legit, it could be disc rot. I ripped my SG1 collection a few years back but apparently a lot of dvds produced between 2006 - 2009 from Warner have issues.
SG1 is included in the list here.