[vlc-devel] RFC: vlc_player: SPU tracks: subtitles, DVD/Bluray menus and teletext

[Thomas Guillem]

On Mon, Oct 15, 2018, at 15:20, Steve Lhomme wrote:
> On 15/10/2018 14:48, Thomas Guillem wrote:
> > Hello,
> >
> > I have some questions about how we expose the SPU track listing with the future vlc_player.
> >
> >   - 1/ Do we want to expose all SPUS from the track listing ? Is it coherent to expose the DVD menu track (the one that highlight) ? IMHO, it should be hidden (but we need to patch dvdnav and maybe add  a new variable in subs_format_t to detect it).
> 
> Why not make it available ? Users may want to disable menu highlights. 
> On a standard DVD player I guess it's not even allowed. But in VLC we 
> may allow this. Can't we list the SPUs and the kind of track they are ? 
> Then it's a UI choice to display/select some type and not others.

Yes maybe we can do that, but then we need a new public name for SPU, no ?

> 
> >
> >   - 2/ What about teletext ? I think we want to expose the teletext page that are closed captions, (generally magazine=8, page >= 0x88), and hide the teletext menu (magazine = 1, page = 0) from the track listing. Users will be able to select teletext subtitles via the subtitle track menu, and activate the teletext menu via a specfic vlc player call. Questions: are we sure that the menu is always 100 ?
> >
> >   - 3/ Do we want to keep the name "SPU" ? It's a VLC internal term. If we hide SPU tracks that are not subtitles (DVD/Bluray menus and teletext menu), we could name it "Subtitle".
> >
> >  From the UI perspective: QT and maybe all others UI  have a Subtitle menu that allow to select any SPU (even menus). I don't think we want to keep that.
> >
> > Opinions are welcome,
> >
> > Regards,
> > Thomas.
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