DVD navigation

[Rob Cavicchio]

Samuel Hocevar wrote:


>    Yes. vlc will probably use the Ogle project's libdvdread, 
> which does
> full DVD navigation.

Good to know, thanks!


>    It's not that simple. For example, the .ifo files store position of
> the titles using their byte offset in the DVD device; vlc just seek()s
> at this position to go to the beginning of the file. If you store .ifo
> and .vob files in a directory, there is no reason why the file should
> still be contiguous, and this offset information becomes useless.
> 
>    There are other ways to do it, though, and though it would require
> some amounts of additional code, it's not impossible to implement a
> different method into vlc or libdvdcss so that it supports 
> reading from
> a directory.

OK, thanks for the explanation.  How about the possibility of playing from
an ISO image of the disc, if such a thing is valid for DVD video.  That
would require extraction during playback, but then the block information
could be used.


*************************
Rob Cavicchio
Previo, Inc.
rob.cavicchio at previo.com