[gst-devel] gst-plugins-gl status and direction

[Julien Isorce]

Hi,

If you look at the doc in the doc directory, OpenGL 1.4 is the minimum
required because the plugin cannot work withtout FBO (frame buffer object),
and FBO are avaible only with OpenGL >= 1.4.
And you have OpenGL 1.3.

Try to update MESA if possible.

I think it would be possible to have the glimagesink able to run withtout
checiking FBO, later. But if FBO is not available, this element will be the
only one available.

You have to forget about running glupload, gldownload and glfilters withtout
having FBO available.


About the crash, I have not implemented the plugin yet to correctly shutdown
when some of the requirements are not avaiblable (no FBO) or imcompatible
(ex: FBO yes, no GLSL, no IMAGING, MESA yes, input video format I420)
-> I am adding this in my TODO list

"gst-launch-0.10 videotestsrc ! glimagesink" should correctly shutdown in
your case (no FBO) withtout crashing.

J.

2008/7/18 Jaap A. Haitsma <jaap at haitsma.org>:

> On Thu, Jul 17, 2008 at 12:26 AM, David Schleef <ds at schleef.org> wrote:
> > On Wed, Jul 16, 2008 at 03:16:04PM -0700, Steve Fink wrote:
> >> On Tue, Jul 15, 2008 at 7:39 PM, David Schleef <ds at schleef.org> wrote:
> >> > Code at:
> >> >
> >> >  git://diracvideo.org/git/gst-plugins-gl.git
> >>
> >> For people doing a git clone and trying to build it (like me) -- it'll
> >> try to check something out of CVS, which won't work. Patch over it for
> >> now by making a symlink named 'common' to the 'common' subdir of your
> >> main gstreamer source area. Example:
> >>
> >>   ln -s ../gstreamer/common common
> >>
> >> (too bad I immediately ran into a versioning problem, so I still
> >> haven't managed to build anything...)
> >
> > I just fixed this.  It specifies the full path to anon cvs now.
> >
> Hi,
>
> I checked out the code but if I run the following pipeline
>
> gst-launch-0.10 videotestsrc ! glupload ! gldownload ! ximagesink
>
> It crashes with the following output
>
> Context 1 created
> GL_VERSION: 1.3 Mesa 7.0.3-rc2
> GLEW_VERSION: 1.5.0
> GL_VENDOR: Tungsten Graphics, Inc
> GL_RENDERER: Mesa DRI Intel(R) 915GM 20061017 x86/MMX/SSE2
> gl mainLoop started
> Context 1, EXT_framebuffer_object supported: no
> Context 1, ARB_fragment_shader supported: no
> Context 1, GLEW_ARB_imaging supported: no
> Context 1, GLEW_MESA_ycbcr_texture supported: yes
> Caught SIGSEGV accessing address (nil)
> Killed
>
> Do the gl plugins still not work for Intel cards?
>
> Thanks
>
> Jaap
>
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