[gstreamer-bugs] [Bug 476149] Fix and add needed features to dvdnavsrc

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-ugly | Ver: HEAD CVS




------- Comment #9 from Adam Lofts  2008-01-20 15:47 UTC -------
I've spent some time looking at dvd playback in gstreamer (read: I've rewritten
the dvdnav element a couple of times!) . Unfortunately I won't be able to carry
on until late March. Here are some conclusions I have drawn which someone might
find useful if they want to work on it before March.

* You should understand how dvd's are stored on disc before attempting an
implementation (I made this mistake). 

* One must use libdvdnav (or rewrite the dvd vm) for proper dvd support. dvdnav
is actually a pretty thin wrapper of the data coming off the disc. (E.g. nav
packets remain in the stream).

* Timing details can get pretty tricky with still frames and such. Also seeking
is tricky since we are limited to seeking by title / segment. It is best to
merge the dvdsrc and demuxer into a magic element: dvdmagic.

* Multiple audio formats, subpictures and stillframes all require inter element
communication. Best to keep the implementation hidden inside a dvdbin. 

I began to implement it at http://www.alofts.co.uk/git/?p=dvd.git but there
really isn't much there. Only use it as a guideline.


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