On 12Sep2018 19:03, JD <jd1008@xxxxxxxxx> wrote:
On 09/12/2018 06:05 PM, Ed Greshko wrote:
On 9/13/18 7:57 AM, JD wrote:
So, how in tarnation can I back up this DVD.
What tool can I use that will use dvdcss AND
back up the DVD???
Well, k3b has, under tools, "Rip Video DVD".
I recall using it in the past, but can't find a DVD in my home to test.
Using k3b - and dmesg shows 51 messages like this one
[212014.458325] blk_update_request: I/O error, dev sr0, sector 2443668
So, the dvd is bad?
I think both Ed and I think your libdvdcss install may be an issue.
Have you tried using vobcopy? It also uses libdvdread and libdvdcss but at
least it is command line and quite simple.
But it plays flawlessly!!!
Well that's the thing. Unless you've done some CSS chattering at the drive it
will refuse to decrypt those sectors (usually the VOBs - the other files and
filesystem metadata are generally in the clear) and you get I/O errors. because
the drive knows those sectors are forbidden - I imagine a marker bit is used,
one per encrypted sector.
Your DVD _player_ can speak to its drive and say "hello, I am a trusted device
and I have one of the secret keys" and access the content. The libdvdcss
library brute forces the weak encryption to gain access. The drives themselves
are complicit in the DRM.
Cheers,
Cameron Simpson <cs@xxxxxxxxxx>
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