Date: Fri, 4 May 2007 11:03:12 +0200 From: "Ulrich Spoerlein" <uspoerlein@gmail.com> To: "Scott Long" <scottl@samsco.org> Cc: stable@freebsd.org, "Sean C. Farley" <sean-freebsd@farley.org> Subject: Re: FreeBSD vs Region Code DVDs Message-ID: <7ad7ddd90705040203n40620advb8292c1afea7646b@mail.gmail.com> In-Reply-To: <463A62C9.2010707@samsco.org> References: <20070503181646.GA1527@roadrunner.q.local> <20070503150931.G35420@thor.farley.org> <20070503220704.GA1483@roadrunner.q.local> <463A62C9.2010707@samsco.org>
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On 5/4/07, Scott Long <scottl@samsco.org> wrote: > > Why can I read and mount the DVD, but mplayer/xine > > are still unable to play the DVD? (It works fine on the internal, ATA > > attached, crappy NEC drive.) > > No idea, sorry. Do you have umass, atapicam, and ata-usb all involved > here? If so, you've made the room a little crowded, and they are all > arguing with each other. I know that ata-usb was inspired by the ata > author having problems with umass and not wanting to fix them there, > but I don't know exactly what was broken or what was fixed. I only tested one subsystem at a time, and it is not that one subsystem is broken per se, it is only in combination with this single external Plextor drive. I had another external DVD drive (can't remember the brand) a few months ago and this also was working just fine. I'll try to sum it all up: Internal NEC drive, attached via ata(4): Can read all kinds of CD/DVD Internal NEC drive, attached via atapicam(4): dito Unknown Brand external DVD, attached via umass(4): dito External Plextor, attached via umass(4): Can read CDs, DVD-Rs, unable to do _anything_ with retail DVD(-Video) External Plextor, attached via firewire/sbp(4): dito External Plextor, attached via atausb(4): Can read CDs, DVD-Rs, can mount/read retail DVD(-Video), produces some errors, tough. The CSS decoder seems to fail, as I can't watch the video on the drive. I can at least _access_ the bytes though, something not possible with umass/sbp. I don't know the code, but it looks like this Plextor and cd(4) don't get along when DVD copy protection is involved. I also read in the OpenBSD 4.1 release notes, that they made changes to their cd(4) to work better with region protected DVDs. I didn't know that the OS was involved in this, I thought this was a thing left to the drive firmware or the DVD player software. Anyway, how can I tell cd(4) to give me more error output? How can I access the DVD at the bottom-most layer? Something line sending a Test Unit Ready command? Or checking if the drive recognizes an inserted medium? Uli
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