[DVDnav-discuss] question regarding data coming from libdvdnav

[Nico Sabbi]

On Friday 21 November 2008 00:49:02 Sergey 'Jin' Bostandzhyan wrote:
> Hi,
>
> On Fri, Nov 21, 2008 at 12:26:25AM +0100, Nico Sabbi wrote:
> > > can you post a title to reproduce this problem and the
> > > instructions to generate the network stream?
> >
> > the .mpg file you provided me is as plain as I can imagine: no
> > NAV packets, no menus, only 1 timer reset.
> > There's really nothing that can prevent any decent mpeg player to
> > handle it.
>
> Thanks for looking at it!
>
> Doh.. that makes things more complicated.. I was hoping there would
> be something obvious.
>
> > At what timestamp do you see the first problem?
>
> I can only say the time that the player is printing on the TV, as I
> mentioned in one of the previous posts I tried playing the stream
> twice. The first time it crashed after about 34 seconds (0:0:34),
> the second time it crashed after about 57 seconds (0:0:57).

uhm, non-deterministic

>
> The last theory that I have is, that maybe it is simply "too much"
> for the player in terms of the overall datarate? 

I doubt it, but I still have to check this possibility.
If you run mencoder -of mpeg with a low muxrate you can
see what's the actual needed datarate

> After all this 
> file has 3 audio streams, 1 video stream and a number of subtittle
> streams. I'll try to strip away the rest, leaving only one audio
> stream and one video stream and I will see if the problem persists.
>
> Btw, this leads me to another question, libdvdnav has a function
> called dvdnav_audio_language_select(), what exactly is it good for?
> This does not alter the incoming data anyway, right?
>

it only alters the language selection in the DVD VM (its internal
state-keeping code) not in the application (infact this leads to a lot
of mess in -at least- mplayer)