[MPlayer-users] wrong audio chanell and subtitles on DVD

[Steve Stavropoulos]

On Thu, 18 Oct 2001, Arpi wrote:

> Hi,
>
> it won't work.
> at least vob and mpeg is the same file format. i've seen mpeg2 files (aka
> vob) having mpeg audio sterams (counted from 0) and ac3 sterams (counted
> from 128). so, how to select between them?
>
> mplayer prints (at elast with -v) the ID of streams found, user shoudl try
> those.
>

 So, mplayer KNOWS the ids of the audio streams a mpeg (vob) file has. You
could calculate the aid as I described and IF there are two or more
streams that match then peak a default and print a message to the user
with the extra parameter that he needs to give in case he wants a
different stream.
 That is:
switch( typeof(file) ) {
    case MPG:
            aid += -1;
            if( !exists_audio_stream(aid) && !exists_audio_stream(aid+128) )
                    print_a_message_and_exit();
            if( exists_audio_stream(aid+128) ) {
                    if( exists_audio_stream(aid) )
                            printf("Selected AC3 stream, give option -koko for mpeg stream");
                    aid += 128;
            }
            break;
...
}


> maybe, for real dvd, i'll add support for specify aud by language id, like
> -alang hu, as .ifo file contains the mapping from language to aid.

 That would be nice :-)


> btw a few dvd has multiple audio sterams for the same language, one with
> film makers' comments etc. how to select those?
>

 if the IFO file has the info about which stream is the original sound then
you could select this by default and give an extra parameter for the others.


> > > you should once really RTFM before say docs is sux!
> > >
> >
> >  The problem with the docs is their SIZE. They cover all the things anyone
> > would ask but it's hard to find the info you are looking for in them. I
> > have stoped reading them and just grepping when I need info. Ok, I'm not
> > allways succesfull at finding the info but don't kill me for that.
> i don't kill you (just keep on blacklist hehe:), but if you know it's your
> fault, why do you say it's our???
>

 Just saying that I was misguided by the man page. That resulted in the
todays (or yesterdays) manpage changes, which is a _good thing_.
 Although this thread started from me reading only the man page (and
missing the -aid (but guessing it)), I think I caused some progress in the
manpage documentation and if -aid is fixed at my tastes I will be very
happy.