On 11 Aug 2009, at 20:31, Grant Edwards wrote:
On 2009-08-11, Stroller <strol...@stellar.eclipse.co.uk> wrote:
I'm just really curious why `dd` works perfectly fine the last time,
but not the first.
Hasn't this been answered several times already?
No, it hasn't.
Presumably it works the second time but not the first time
because between the two attempts you've run a program that has
written the decryption keys to the optical drive.
I'm just looking for a better answer than ones prefaced with
"presumably" and which treat DeCSS encryption like it's black magic.
I don't say that to offend anyone, because I'm sure none of the other
posters doing so are claiming to be experts on the subject, either.
Presumably anyone replying saying "oh, it must be something like this"
is interested in discussing their conjecture.
If you disagree with that answer, please esplain why rather
than just re-asking the question again and again.
Well, in the case of the message you quoted, the poster seemed not to
have read the cloning.txt console log I posted. He seemed to be
telling me that what I have done is "impossible" and I was correcting
his misunderstanding.
You will see that I already explained in my message of 11 August 2009
19:58:11 BST some aspects of this still confuse me.
If you'd like me to clarify that post further then I guess the best
way I can explain it is: if I've "run a program that has written the
decryption keys to the optical drive" (your words), how come mplayer
still has to retrieve the CSS keys (see cloning.txt) when it's run on
the disc.iso file? (using "-dvd-device" argument) The answer to that
is surely "because the movie is still encrypted", so (to me) that begs
the question "why's the movie file still encrypted if I've written the
decryption keys to the optical drive?"
This seems to me to be a logical loop, and I'd really be genuinely
glad for someone to explain where I'm looking at it wrong (but please
ignore this message if the subject is bothering you).
I suspect someone who really understands what's going on here doesn't
need the additional clarification of my previous 2 paragraphs. There's
probably a really simple explanation for what's going on here.
Stroller.
