On 9/4/07, Ian C. Blenke <icblenke@nks.net> wrote:
> Mario Lombardo wrote:
>
> >>On Tuesday 04 September 2007 14:55, Mario Lombardo wrote:
> >>How can I preserve the full DVD content, menu intact, while having the
> >>portability of excellent compression as with some codecs
> >>
>
> Er, sorry, back to your original question:
>
> The .vob files themselves have the menus encoded into them. Those files
> aren't "only video", they also include other formatted metadata that
> enable that extended content.
>
> While you can rip an entire DVD with decss (or something that uses
> libcss), this only removes the silly encryption of the DVD media.
>
> This would allow you to burn your own unencrypted DVDs, or play the .vob
> formatted files directly off your harddrive, including all menus and
> extended content that were on the DVD originals.
>
> mplayer --dvd-device /path/to/copy/of/vob/files dvd://1
>
> Doing this does require all of the space, however.
>
> Think of a .vob files as an encapsulated filesystem with metadata and
> other bits that are part of the representation of your video, menus, and
> extended content.
>
> Quite simply, there is no way to re-encode video with a different codec
> and still have a DVD compliant player able to play said content.
>
> Not only would you need to regenerate the vob files with the modified
> codec video inside, you would need to change the specifications of that
> vob format as well as every DVD player to be aware of the codec used for
> your video.
>
> DVD players know MPEG2, I'm fairly certain the DVD format specs don't
> permit you to do what you are thinking of doing.
>
> Then again, mastering DVDs isn't my day job ;)
>
> I have heard mention now and again of theora formatted video metadata
> for menuing and whatnot, though when I've seen such things it has
> usually been for one specific software player or another.
>
> Converting from a DVD menu to some other software player menuing system
> is quite nebulous.
>
> You'll probably be better off just buying more disk space to store your
> unencrypted DVDs in .vob form.
>
> - Ian C. Blenke <ian@blenke.com> http://ian.blenke.com/
>
>
> -----------------------------------------------------------------------
Through some channels of Wikipedia, I found the following. It looks
comprehensive.
http://www.doom9.org/index.html?/dvd-structure.htm
I'm reading something about menus. I'm still not sure how to preserve
this. I'll try to shoot something back if I feel I've learned
something enough to give.
/mario
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