Caps to set for streaming openGL framebuffer from appsrc

[Martin Vachovski]

Hi Arvin,

As per the first problem:
>>> ** (gst-launch-1.0:4745): CRITICAL **: gst_gl_window_get_context: assertion
>>> 'GST_IS_GL_WINDOW (window)' failed
>>> Caught SIGSEGV
>>> exec gdb failed: No such file or directory

I think that you might have problems with your gstreamer installation, opengl drivers, or the x-server.
The pipeline I suggested before works for me both under
Windows 10, gst 12.2
Ubuntu 16.04, gst  1.8.2

Try replacing the
autovideosink
with fakesink, or with ximagesink (Linux)
and see if the pipeline plays.

>>>> I get this error. Also, my real problem is streaming openGL framebuffer on
>>>> tcp. I get a number of issues like,
>>>>  ERROR from element Our-Source: Internal data stream error.

I might be wrong, but as far as I understand, the
video/x-raw(memory:GLMemory)
really represents memory which is placed on your video card's memory,
so just sending it over tcp won't be easy.

You should try to download these buffers with the gldownload element first.

Hope that helps
Martin

________________________________________
From: gstreamer-devel <gstreamer-devel-bounces at lists.freedesktop.org> on behalf of Arvin6 <arvindn995 at gmail.com>
Sent: Tuesday, October 3, 2017 11:12 AM
To: gstreamer-devel at lists.freedesktop.org
Subject: Re: Caps to set for streaming openGL framebuffer from appsrc

$ gst-launch-1.0 videotestsrc ! glupload ! video/x-raw\(memory:GLMemory\) !
gldownload ! videoconvert ! autovideosink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...

** (gst-launch-1.0:4745): CRITICAL **: gst_gl_window_get_context: assertion
'GST_IS_GL_WINDOW (window)' failed
Caught SIGSEGV
exec gdb failed: No such file or directory
Spinning.  Please run 'gdb gst-launch-1.0 4745' to continue debugging,
Ctrl-C to quit, or Ctrl-\ to dump core.

I get this error. Also, my real problem is streaming openGL framebuffer on
tcp. I get a number of issues like,

ERROR from element Our-Source: Internal data stream error.
Debugging info: gstbasesrc.c(2939): void gst_base_src_loop(GstPad *) ():
/GstPipeline:ppipe/GstAppSrc:Our-Source:
streaming stopped, reason not-linked (-1)

do you have any idea on that part?
Martin Vachovski wrote
> Try
>
> video/x-raw(memory:GLMemory)
>
> On the console, the brackets need to be escaped:
>
> gst-launch-1.0.exe videotestsrc ! glupload !
> video/x-raw\(memory:GLMemory\) ! gldownload ! videoconvert ! autovideosink
>
> Cheers
> Martin
>
> ________________________________________
> From: gstreamer-devel <

> gstreamer-devel-bounces at .freedesktop

> > on behalf of Arvin6 <

> arvindn995@

> >
> Sent: Tuesday, October 3, 2017 9:58 AM
> To:

> gstreamer-devel at .freedesktop

> Subject: Caps to set for streaming openGL framebuffer from appsrc
>
> What caps are to be set for streaming openGL framebuffer? I used
> "video/x-raw","width", G_TYPE_INT, 640, "height", G_TYPE_INT, 480 but I
> get
> a negotiation error. Please help.
>
>
>
> --
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