Re: [xine-devel] Parsing NAV PES packets in the stream.

[H}kan H. <d95...@dt...>]

Sat Jul 14 2001, Guenter Bartsch wrote:
> Hi James,
>=20
> On Wed, 11 Jul 2001, James Courtier-Dutton wrote:
>=20
> > With DVDs the NAV(Menu) packets are already in the stream. Just like
> > SPU,MPEG2 and AC3.
>=20
> spu could be a problem already since they're not part of any mpeg
> standard.
>=20
> Now, the NAV packets AFAIK are embedded as "private stream 2" so I'd
> really like to see that handled in the input plugins as it's a very
> DVD-specific extension.=20
>
I'd bet that subpictures are just as DVD-specific as NAV packets..
What make the NAV packets beeing embedded as PRIVATE STREAM 2,
special?  SPU packets are embedded as a sub-stream of PRIVATE STREAM
1, just like AC3 and DTS (can't remeber if that is where SDDS and PCM
is too).

On the other hand if you intend for all the DVD navigation be be
handled in the input plug in, then it does indeed need to get the NAV
packets somehow. That migth be done by having it either demux them for
it self or sending all "private stream 2" pakcets back to the input
plugin (i.e. it's the "private stream 2"/nav decoder).

The navigation doesn't really change the subtitles, but rathere the
spu decoder must know what region to highligh, if the subtitle is
turned on or off and what (pts) time it is.

--=20
H=E5kan Hjort, trying to catchup on mail
d95...@dt...