All excellent questions I have wondered about myself, only a few of which I feel qualified to answer, but here goes...
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Originally Posted by DocuPerson Hello all.
I don't mean to be critical of the DVDFab software, but can somebody explain something to me?
Why is it that when DVD publishers publish a new DVD with a slightly different copy protection scheme, existing DVD players don't need to be updated to decode and play them, but backup software such as the DVDFab series does need to be updated to decode and copy them? |
Like everything else, DVD copy protection schemes have changed over time. The original CSS type of protection was the same for every disc; a binary code could be extracted that made all the content copyable. The code was different for each disc, but the method for extracting and applying it identical. Hence no updates required. Newer schemes, generally referred to as "structure protection", work differently and are different from title to title, each with different decoding requirements for a proper read. Hence updates required for many (particularly Sony) titles.
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Is the way DVDFab reads and decodes DVDs fundamentally different from the way DVD players do it? And if so, then why is it different?
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Yes it is. I have no idea why, nor why player type smarts could not be written into copying software. The idea that it can't is counterintuitive, but I'm sure there's a good reason.
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For example, an older version of DVDFab Decrypter could copy "Pictures of Hope", an infomercial DVD about an antidepressent drug called Effexor XR and create a playable DVD, but it was full of duplication glitches. But a newer version, DVDFab Platinum v 3.0.7.2 produces a glitch-free copy.
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This sounds more like a read error or bad spot on the original disc. Error handling has improved as the product has evolved. Is the original a DVDR (bluish) or DVD-ROM (silver)?
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DVDFab Platinum v 3.0.7.2 can't make a glitchless copy of Spike Lee's :"When the Levees Broke: A Requiem in Four Acts": Disc 1. The result has multiple duplication glitches at the 38 minute and 59 minute points. But I imagine that a newer version will.
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Again sounds like a read error. I would upgrade to 3.0.8.0 and see how you have error handling set up in Common Settings-->Read. Select the "Ask/Retry/.." button and allow a larger number of retries in the "Retries" pulldown menu. Brief hiccups in the output are not typical copy protection symptoms.