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Re: [E-devel] Subtitles in Emotion ?



On Sun, 29 Oct 2006 10:05:02 +0000 (GMT) Vincent Torri <vtorri@univ-evry.fr>
babbled:

> 
> something interesting for subtitles is the 'halo' of the text, like that:
> 
> http://avisynth3.unite-video.com/avs_text.png
> 
> it is sometimes necessary to have that halo because the text can be 
> unreadable if the color of background is closed to the one of the text.
> 
> I don't know if it is easily doable with evas or not.

yes it is - there are text styles to add glow, shadows, (glow and outlines are
the same just given well chosen colours) etc. :)

> Vincent
> 
> PS: that example has been done with feetype
> 
> On Sun, 29 Oct 2006, Simon TRENY wrote:
> 
> > On Sun, 29 Oct 2006 10:13:15 +0900,
> > Carsten Haitzler (The Rasterman) <raster@rasterman.com> wrote :
> >
> >> On Sat, 28 Oct 2006 22:44:07 +0200 Charles de Noyelle
> >> <mansuetus@spontex.org> babbled:
> >>
> >>> Hello,
> >>>
> >>> My post is about .srt subtitles in Emotion.
> >>>
> >>> I tried to look into the code, and I *think* that nothing is done
> >>> to read subtitles. What I expected and look for is kind of
> >>>
> >>> EAPI void emotion_object_{subtitles,spu}_file_set ( Evas_Object
> >>> *obj, const char *filename )
> >>>
> >>> I saw the "emotion_object_spu_channel_count(Evas_Object *obj)" But
> >>> I could not figure out what it was used for... DVD's subs ?
> >>
> >> yes - dvd subtitles are handled by libxine as video overlays - they
> >> do work if turned on. there is no way to use external files.
> >>
> >>> The thing is that needs some changes in Emotion EAPI, and maybe, a
> >>> such thing is not wanted (read subtitles in Emotion).
> >>>
> >>> What do you thing about it? Would that be easy to do? Is it
> >>> necessary?
> >>
> >> i suggest first looking at gstreamer and xine api's to see if you can
> >> put it there as the subtitles also need to be timed to the video.
> >>
> > I had implemented .srt support for eclair some times ago and it was
> > working quite well but it is now broken since it still uses the old
> > textblock API. I know that the API of xine allow to load external
> > subtitles, and gstreamer's probably does too, but those substitles
> > won't look as good as if we use an evas' text object to render them:
> > xine and gstreamer directly render the subtitles in the YUV data, so
> > when the video is stretched, the subtitles are stretched too. With
> > evas' text object, we could also make the subtitles transparent, glow,
> > cast a shadow, ... So I would probably be a good idea to make emotion
> > render its own subtitles.
> >
> > Now there are several problems that I met when I implemented that in
> > eclair. First the text encoding: Evas requires UTF-8 whereas .srt
> > files doesn't seem to follow a standard: some times they uses 8-bit
> > ascii, some times UTF-8, ..., and it's not specified in the files. So
> > we would need to be able to auto-detect the encoding of a text. Is
> > there a way to do that? And also, I noticed that when you render an
> > incorrectly UTF-8 encoded text with Evas, Evas only renders the text up
> > to the first incorrect character, the following characters are not
> > rendered. It may be good to just ignore the incorrect character, and to
> > continue to render the others (I don't know if it's easy to do though, I
> > just know that GTK and QT do that so it should be possible :))
> > Other problem: there are a lot of subtitle formats (srt, ssa, txt, ...)
> > so we would need a lot of loaders if we want to support them all. Srt
> > seems to be the most used by far (and it is really easy to load), so we
> > should probably start with it.
> >
> > I will try to add .srt support to emotion this week end.
> >
> > Simon
> 
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-- 
------------- Codito, ergo sum - "I code, therefore I am" --------------
The Rasterman (Carsten Haitzler)    raster@rasterman.com
裸好多
Tokyo, Japan (東京 日本)