[vlc-devel] Dynamic overlays

Kaarlo Räihä agent_007 at luukku.com
Fri Oct 31 07:18:33 CET 2008

ogg.k.ogg.k at googlemail.com kirjoitti 30.10.2008 kello 18:53:
> Hi,
> what is the preferred way to display dynamic subtitles in VLC ?
> A search did yield 3 variables (spu-duration, spu-elapsed,
>  text-rerender)
> but this seems to be confined to just one lump of text, and doesn't seem
> to be used much at all.
> I'd like to be able to essentially draw anything onto the video. It
>  could
> be that going for a video_filter would be the right option, but those
> overlays will be coming from a subtitles stream in the video (the kate
> subtitles module) so I'm not sure how that'd work.
> Is there a better way ? If not, is there anything I should know about
> communication from a codec to a video filter ?
> Thanks

You want to use some existing API for drawing? (SVG, OpenGL, etc.) If you want to draw generic stuff, the subtitle filters aren't the best option. If you want to create your own module/plugin and you know basics of computer graphics, you can just edit for example wave.c or other filter in modules/video_filter

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