[gst-devel] glupload, glimagesink openGL question

[Miquel Àngel Farré]

Julien,

I am managing my openGL scene under linux, using SDL.

I have tryed xoverlay: glimagesink sending video to my openGL context
through his windowID.

I was able to see the video on my openGL context screen, the problem is
flickering, in my application I am doing something like:

while(true)
{

  glClear();
  for (all textures)
  {
    draw();
  }
  glSwapBuffers();
 }

 Another (secundary) problem is that sometimes I need the video in a little
quad instead of fullscreen..

What do you think is the best way to implement it?

Thanks,


Miquel


2009/8/26 Julien Isorce <julien.isorce at gmail.com>

>
>
> 2009/8/26 Miquel Àngel Farré <miquel.farre at gmail.com>
>
>> Bug is submitted!
>>
>> Putting the bug apart, if I do something like mpegtsdemux ! queue !
>> glupload ! appsink, what I have at the output are opengl textures right? So
>> I can draw it directly into a quad ?
>
>
> This is not exact.
>
> If you are making an OpenGL scene, and you want to put gstgl textures into
> this scene.
> (then it means that you are managing your opengl context and your are also
> familiar with OpenGL API)
> Then gst-plugins-gl/tests/examples/clutter/cluttershare.c is the example
> you need.
> (But it's not so easy. you have to share your OpenGL context with the one
> inside gl elements)
>
> If you are not familiar with opengl and you just want to display the video
> on a quad, then you should consider to look into
> gst-plugins-gl/tests/examples/generic/cube and
> gst-plugins-gl/tests/examples/qt/qglwidgetxoverlay
>
>
>>
>> The bigger reason of use glupload is avoid the raw-yuv to rgb conversion..
>
>
> So if your are not managing your own opengl scene, then just look into
> gst-plugins-gl/tests/examples/gtk/gtkxoverlay
> This example shows how to use the xoverlay interface.
>
>
> Just a question in case your are familiar with OpenGL and if you are
> already managing your own OpenGL scene,  which framework are you using ? on
> which OS ?
>
> Regards
> Julien
>
>
>>
>>
>> Thanks,
>>
>>
>> Miquel
>>
>> 2009/8/26 Julien Isorce <julien.isorce at gmail.com>
>>
>>>
>>>
>>> 2009/8/26 Florent <fthiery at gmail.com>
>>>
>>>> Hi
>>>>
>>>> >  * Question: what glupload ! glimagesink do?
>>>>
>>>> glimagesink uses glupload internally, so you don't need it for using
>>>> glimagesink. You need glupload only if you want to filter the frames
>>>> using opengl (ex: glupload ! gleffects effect=2 ! glimagesink)
>>>>
>>>> Florent
>>>>
>>>>
>>>
>>>>  Doesen't work:
>>>>
>>>>    gst-launch -v -m filesrc location=../dumps/itv.ts !  mpegtsdemux
>>>> program-number="8442" ! queue ! mpeg2dec ! glupload ! glimagesink
>>>>
>>>>    gst-launch -v -m filesrc location=../dumps/itv.ts !  mpegtsdemux
>>>> program-number="8442" ! queue ! mpeg2dec ! glupload ! gldownload !
>>>> glimagesink
>>>>
>>>>  * Question: what glupload ! glimagesink do?
>>>>
>>>>
>>>> Thanks,
>>>>
>>>>
>>>>  Miquel
>>>
>>>
>>> Hi,
>>>
>>> Both should work,
>>> Please file a bug and attach the console log of:
>>>
>>> GST_DEBUG=gldisplay:3 gst-launch -v -m filesrc location=../dumps/itv.ts
>>> !  mpegtsdemux program-number="8442" ! queue ! mpeg2dec ! glupload !
>>> glimagesink
>>>
>>> and:
>>>
>>> GST_DEBUG=gldisplay:3 videotestsrc ! "video/x-raw-yuv,
>>> format=(fourcc)I420" ! glupload ! glimagesink
>>>
>>> Julien
>>>
>>>
>>>
>>>
>>>
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