On 12/5/05, Gnu-Raiz <[EMAIL PROTECTED]> wrote: > On 11:23, Mon 05 Dec 05, Matt Price wrote: > > Hi there, > > > > I have made a copy of a dvd which is encrypted with libdvdcss. I'm > > pretty sure the copy (which is for research purposes) is legal under > > Canadian law, so please let's not get into that. I made the copy in > > the following way: > > > > dd if=/dev/hdd of=dvd_file.iso > > then > > dvdrecord dev=ATA:1,1,0 -dao dvd_file.iso > > > > I did md5sum checks on the original disk, the copy on my hd, and the > > copied disk. All come out the same. The .iso file on my computer > > plays fine under vlc, though I have some trouble with totem and > > mplayer. However, the copied dvd doesn't play back properly under > > any player. [...] > > You also might want to read up on the dvd backup process, > most of the time it involves ripping out the vob's off the > disk. Once you have the vobs, you should be able to do > whatever you need to them. Even if you make a bit copy of a > dvd, depending on the dvd, and the drm it might not work. > After all it copied all the drm over, and is bitwise correct > of the original which might or might not want you to watch > the dvd on your computer.
THanks for the suggestions. Just for the archive, I hunted faround as per your advice & found the source of my problem: I recorded onto a dvd-r disc, which has a copy-protected ring att he beginning of the volume; since, apparently, dvdcss looks for css keys in these opening bits, it doesn't matter that the keys are contained in the backup image I burned; therefore, in order to make a backup, decryption is necessary. So dd won't work, and dvdbackup is necessary isntead. Thus I used this method, found here: http://www.johnvansickle.com/dvdbackup $ dvdbackup -v 2 -M -i/dev/hdd -o/outputdir $ growisofs -dvd-compat -Z /dev/hdd -dvd-video /outputdir worked great on the first try -- since this was a dvd-5, there was no need to transcode or recompress the files, and the burn took less than half an hour on my cheap plextor 16x burner.
