[vlc-devel] Re: Using VLC in my application
hartman at videolan.org
Fri Oct 17 01:18:55 CEST 2003
On woensdag, okt 15, 2003, at 21:54 Europe/Amsterdam, Andreas Korth
> I hope this is the right place to post my request. My apologies if
> this is
> inappropriate by any means.
Asking questions is always appropriate and encouraged. Demanding
answers as some users seem to make a habbit of, of course isn't, but
any request asked as politly as yours can always expect an answer.
> I'd like to use VLC with my current project to playback video files
> (MPEG-4/DivX/Xvid) in an OpenGL context, that is, using the RGB video
> output as a texture to be mapped onto 3D geometry. Actually, several
> streams (up to a total of four) are to be rendered simultaneously.
cool. however, at the moment vlc can only decode one stream at a time.
for this to work would require 4 instances of vlc running and working
together. This limititation of VLC will not be fixed soon or quickly
> I'm a senior Java developer with some experience in C++ on the Windows
> platform. This particular piece of software however is targeted
> to the Unix platform (GNU Linux, actually) and it is build upon the SDL
We already have some SDL code for the audio output and video output.
in the source look for:
> If my understanding of the VLC architecture is correct, I'll need to
> a generic interface plugin and an output plugin which creates/modifies
> GL texture.
if you want to control vlc, you indeed need either a control interface,
or a gui interface.
for displaying video, you only need a video output module
> I'd really appreciate any pratical hints on how to get started. If
> has already accomplished anything similar to my approach (e.g. you
> wrote a
> generic interface plugin), I'd be interested in source code examples,
well just look at how other plugins are build.
modules/video_output/sdl.c and modules/video_output/aa.c are probably
two very simple video_output modules. directx and x11 are more
complicated but after a while you'll be able to read them.
Untill lately we didn't really have much API/code documentation, we are
however trying to change that, and there is some incomplete information
The video API is fortunately one of the areas which is now partially
> I'd also like to know, for example, which source files (from the VLC
> project) I can build upon (i.e. modify and customize them to fit my
> or which ones are worth examining in order to get a better
> of VLC's (plugin) architecture.
plugins are all located in the /modules directory sorted by function.
the API and application code is in the /src directory
If you have any questions you can always drop into our chat channel
Videolan - VLC media player
Derk-Jan Hartman (thedj at users.sourceforge.net)
Co-Developer of the MacOS X port of vlc
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