Remember last weeks message that some ppl created 7 lines of Perl script that could be used for decoding DVD's CSS scrambling system. Well mr Charles H Hannum beats it! He created an even smaller program in C that can decode DVD's at 21.5 MBps! Quite impressive! Also because he tells us that his program does a better job than the Perl-program does. No stuttering or whatever: just a smooth picture.
Hannum's C program, called efdtt, is no slouch, either. The programmer claims it can "descramble in excess of 21.5MBps" - faster than the DVD spec. allows for. The speed comes "without even particularly trying to optimise the I/O. This makes it pretty insignificant compared to the rest of the decoding process" = in other words, it's quick enough not to impede the MPEG 2 decode operation which turns the data into a moving image. Both scripts do what the controversial DVD-on-Linux utility DeCSS does - and demonstrate how simple CSS, the DVD standard's copyright protection mechanism, is to decode. The Motion Picture Association of America has been pretty successful in repressing the distribution of DeCSS, viewing it as a threat to movie industry copyright - and movie industry profits. |
Just one thing: I'm wondering about the reaction from the movie industries…..
Source: The register
