Re: [E-devel] Subtitles in Emotion ?

[Vincent T. <vt...@un...>]

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.

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) <ra...@ra...> wrote :
>
>> On Sat, 28 Oct 2006 22:44:07 +0200 Charles de Noyelle
>> <man...@sp...> 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