[MPlayer-users] No CSS keys if VOB file name specified ????

[Reimar Döffinger]

On Thu, Jun 05, 2014 at 02:04:25PM +0200, Alexander Roalter wrote:
> Am 01.06.2014 18:37, schrieb Sean Darcy:
> >On 05/31/2014 09:17 AM, Reimar Döffinger wrote:
> >>On Fri, May 30, 2014 at 02:54:27PM -0400, Sean Darcy wrote:
> >>>I'm trying to convert vob's to mpg's.
> >>>
> >>>When I use dvd://1 libdvdread gets the CSS keys:
> >>>
> >>[...]
> >>>But I don't want all of track 1, but if specify a VOB, it doesn't get the
> >>>key:
> >>
> >>The VOB is just a MPEG-PS file, MEncoder can't know it is encrypted.
> >>Even if it know that, dvdcss does not support decrypting plain files (it
> >>isn't really intended to work that way from the DVD specification side
> >>anyway).
> >>If you want to copy only parts, consider using -chapters, -endpos etc.
> >>options.
> >>If you want to decrypt just the vob, use tools designed for the purpose
> >>like e.g. vobcopy.
> >>Remuxing with mencoder just to remove the CSS protection isn't a good
> >>idea, it needlessly risks breaking things (e.g. since you don't use -noskip
> >>your commands will often result in broken video).
> >>
> >Thanks for the response. I've got vobcopy. I work with that.
> >
> >sean
> I usually use
> 
> mplayer dvd://1 -dumpstream -dumpfile file.vob
> 
> Which does the decrypting and gives me the decrypted VOB (which, as Reimar
> already mentioned), a MPEG-PS file.

That is definitely better than using mencoder, and I think -chapter
works for it nowadays, but he wanted only parts of the first title,
more specifically exactly what that vob file contains.
While I admit this is kind of strange/unusual, vobcopy should be
easier for that specific use-case.