[MPlayer-dev-eng] Custom subtitle output

[Gast]

Reimar Döffinger schrieb:
> On Mon, Sep 28, 2009 at 10:09:37AM +0200, Gast wrote:
>> Gast schrieb:
>>> Reimar Döffinger schrieb:

>>>> On Mon, Sep 28, 2009 at 06:36:03AM +0200, Gast wrote:

>>>>> I would like to ask if it is possible to show the subtitles
>>>>> on stdout instead drawing them on the OSD. I'd like to
>>>>> use an external liquid crystal display (LCD) to display
>>>>> my subtitles (of course using a file descriptor or direct
>>>>> access to serial port), but the current vo_* seems not
>>>>> to be the right place to do subtitle processing for me.

>>>> For text subtitles: look at mplayer.c:set_osd_subtitle.
>>>> For bitmap subtitles and pre-rendered text: any video filter
>>>> can intercept them, like vf_expand does (or vf_ass for the
>>>> ass subs).

>>> Thank you very much. I'll just get the latest snapshot of
>>> mplayer and try it out. Seems like there is no set_osd_subtitle()
>>> in the mplayer shipped with Ubuntu 8.04.

>> Got the latest snapshot of mplayer. It seems like set_osd_subtitle()
>> is not called for rendering the text if using vo_x11, vo_xv or vo_sdl.

> Ups. Yes, I forgot something. It will only work for embedded subs
> currently.

Hm, I've tryed it with embedded Subtitles. I've embedded the Subtitles
using:
mencoder -slang eng -of lavf -lavfopts format=mp4 -oac lavc -ovc lavc -lavcopts
aglobal=1:vglobal=1:acodec=libfaac:vcodec=mpeg4:abitrate=128:vbitrate=1200:keyint=250:mbd=1:vqmax=10:lmax=10 

-vf harddup -sub /tmp/test.sub test.mpg -o test_with_subs.mp4

Subtitles are showing up correctly, but there is no indication that
set_osd_subtitle() is used. I'd check out the source code if mplayer wouldn't
be such a big project. It's pretty hard to find out what's actually going on
without having any idea what's going on internally in mplayer and how the
structure is.