4.5 Why can't I play movies copied to my hard drive?
Description
This article is from the DVD Formats FAQ, by jtfrog@usa.net (Jim Taylor) with numerous contributions by others.
4.5 Why can't I play movies copied to my hard drive?
Almost all movies are encrypted with CSS copy protection (see 1.11).
Decryption keys are stored in the normally inaccessible lead-in area of the
disc. If you copy the contents of an encrypted DVD to a hard drive, the
keys will not be copied. If you try to play the VOB files, the decoder will
request the keys from the DVD-ROM drive and will fail. You may get the
message "Cannot play copy-protected files".
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