[vlc-devel] commit: Do not ignore teletext initial page (close #1997). (Laurent Aimar )

Derk-Jan Hartman hartman at videolan.org
Sun Sep 7 22:52:36 CEST 2008

On 7 sep 2008, at 22:44, Marian Ďurkovič wrote:
> On Sat, Sep 06, 2008 at 02:47:45PM +0200, Laurent Aimar wrote:
>> On Sat, Sep 06, 2008, Derk-Jan Hartman wrote:
>>> I'll take another look at this.
>>> We are dealing with this slightly incorrect actually. It's one  
>>> stream
>>> that signals different start pages for different "usages". These
>>> usages should cause us to create "extra" tracks that have different
>>> "initial" pages for browsing the Teletext stream.
>> I am not sure to understand you.
>> What is currently done:
>> Create a ES per page we find interesting that is:
>> - the initial teletext page (the menu)
>> - subtitle tracks
>> Before, the initial teletext page was ignored. If there was no  
>> subtitle
>> VLC did not create any teletext ES, so you could not enable  
>> teletext decoder.
> I'm afraid there is (was before you latest commits?) some other  
> problem
> - e.g. VLC 0.8.6 happily detected teletext subtitles on various TV  
> channels,
> while 0.9.2 believes there are no subtitles at all.

I believe this is what was fixed by either Laurent's commit, or by mine.

> Moreover, the Win32 version seems to lack the support even for  
> subtitles,
> the log says:
> main error: no suitable decoder module for fourcc `telx'.
> VLC probably does not support this sound or video format.

I have not tested the simple teletext subtitle decoder for a while  
now. I'll take a look.
I'm not sure if the zvbi decoder is enabled in windows, i believe jb  
said it was quite difficult to compile on Windows.


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