[mythtv] mtd: libdvdread vs libdvdnav

[Bradley Kite]

Hi all,

I'm currently looking into converting Myth Transcoding Daemon to use
libdvdnav (as libmythdvdnav) instead of libdvdread because this is what is
used when actually watching DVDs in the first place (removes a dependency),
and doesn't have problems with RipGuard or other copy protection mechanisms.

In my initial testing I have developed a C app (with libdvdnav) which just
dumps the mpeg stream to disk (just to prove to myself that I can do it
because I've never worked with either libdvdread or libdvdnav before) and it
seems to work OK.

The problem I have so far is that it just seems to run really slowly. Like
just about playback speed.

Now this is most probably a libdvdnav question and this might be the wrong
list, however I was wondering if I could have the advise of a libdvdnav
expert on here: As libdvdnav actually implements a DVD virtual machine, my
guess is that its this that is controlling "play-back" speed (in
dvdnav_get_next_cache_block() ??).

Does any body know if its possible to get around this?

If its not possible to get around this problem, I would welcome comments
regarding possibly having two rippers: One that uses libdvdread (for
non-ripguard DVD's) and another using libdvdnav for the disks that don't
work with libdvdread?

Any other general guidence will be welcomed also!

Regards
--
Brad.
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