[mythtv-users] How long should a mythdvd perfect rip take?

[Marco Nelissen]

>On 6/28/06, Michael T. Dean <mtdean at thirdcontact.com> wrote:
>> On 06/26/2006 04:50 PM, Steve Hodge wrote:
>> > On 6/27/06, Marco Nelissen <marcone at xs4all.nl> wrote:
>> >
>> >> Some DVD drives also are much slower reading movie-DVDs than they are data-DVDs.
>> >>
>> > I guess some drives must be slow at decoding CSS? Because otherwise a
>> > movie DVD is just a data DVD with a particular directory structure.
>>
>> The drive doesn't decode it.  It's the CPU that decodes.  If the drive
>> decoded it, it would be legal to play back DVD's on Linux in the US.
>
>That makes sense. So why would a drive be slower at reading a movie
>DVD than a data DVD?

There is slightly more to a movie DVD than being a data DVD with a particular
directory structure. For one thing there's the encryption/authentication keys
that are present on the disc, so the drive "knows" whether it's a movie DVD
or a data DVD. It could just be that some DVD drive firmware is written such
that it doesn't go into the highest speed for movie-DVDs (for whatever reason).
Or maybe it's got something to do with the media itself. My Samsung DVD drive,
for example, reads DVD+R at 12x, but DVD+RW is read at 8x, while DVD-ROM is
read at 16x.