Headless mode for GL plugin

[Alexander Yanin]

Thank you, Matt. I will try, hope this should work with 1.14​

2018-03-23 15:25 GMT+03:00 Matthew Waters <ystreet00 at gmail.com>:

> It should work out of the box if you don't already have an X11/Wayland
> display server running.  It's chosen after X11/Wayland connections fail.
>
> You can also force it by setting the environment variable GST_GL_WINDOW=gbm
>
> e.g. GST_DEBUG=gl*:4 GST_GL_WINDOW=gbm gst-launch-1.0 videotestsrc !
> glupload ! gleffects_squeeze ! glcolorconvert ! gldownload ! pngenc !
> filesink location=test.png
>
> Cheers
> -Matt
>
>
> On 23/03/18 22:57, Alexander Yanin wrote:
>
> ​Thanks! Fine, what I need to do to make it work on Intel Kabylake with
> Mesa and without neither xorg nor wayland? Would it work right out of the
> box or should I perform some additional actions to make it run?
>
> 2018-03-23 14:50 GMT+03:00 Matthew Waters <ystreet00 at gmail.com>:
>
>> Accessing the GPU without a windowing system is something that is very
>> specific to every driver/hardware combination.  We support (with 1.14) one
>> method using kms and a libgbm compatible driver which are used by all of
>> the Mesa drivers.  Some other embedded systems (rpi, imx6) have other ways.
>> That nvidia blog post you've linked contains references to
>> EGL_EXT_device_query
>> <https://www.khronos.org/registry/EGL/extensions/EXT/EGL_EXT_device_query.txt>
>> which I guess is nvidia's way of performing a similar thing and such a
>> method could be added to the GStreamer GL library and plugins.
>>
>> Cheers
>> -Matt
>>
>>
>> On 23/03/18 21:10, Alexander Yanin wrote:
>>
>> Hi!
>>
>> Is it possible to use GL elements (like glvideomixer, glupload,
>> gleffects, etc) without anything like Wayland, Xorg, etc? In particular, I
>> want to use glvideomixer instead of compositor on a server without any
>> display attached. I heard about a possible workaround using frame buffer,
>> but I didn't manage to find a way to use glvideomixer without xorg or
>> wayland. It crushes on context initialization.
>>
>> Here is the output:
>>
>> glmixer gstglbasemixer.c:217:_get_gl_context:<mixer> error: Failed to
>> initialize egl: EGL_NOT_INITIALIZED
>> glwindow gstglwindow.c:285:gst_gl_window_new: Could not create window.
>> user specified (null), creating dummy window
>> glcontext gstglcontext.c:1235:gst_gl_context_create_thread:<glcontextegl48>
>> Failed to create context
>>
>> So, is there a way to bypass this issue without using xorg or wayland? I
>> heard that it is possible to initialize EGL without xorg [1]. Is it
>> possible to use this approach within gl elements?
>>
>> [1] - https://devblogs.nvidia.com/egl-eye-opengl-visualization-w
>> ithout-x-server/
>>
>>
>> _______________________________________________
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>>
>>
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