Vaapidecode Format and OpenGL

[Zelnes]

Arjen Veenhuizen wrote
> Your code was probably scrubbed from the mailinglist. 

Yes, it's also what I think. Could I post it here ?


Arjen Veenhuizen wrote
> You can run 

> to get an idea of the caps in use. In code, you could use the notify::caps
> signal on a GstPad to figure out which caps are in use.

Thanks, I now have an idea about the format used whith autovideosink. Do you
know how I can set the caps ? Whenever I try to create a caps :
GstCaps * caps = gst_caps_new_simple("video/x-raw", "format, G_TYPE_STRING,
"RGBA", "width", G_TYPE_INT, 1920, "height", G_TYPE_INT, 1080, NULL);
I get a Segfault. I wanted to set this either by linking vaapidecode to
appsink using this filter, or by setting the caps on the vaapidecode src
pad.


Arjen Veenhuizen wrote
> W.r.t. 
> GstSample
> <https://developer.gnome.org/gstreamer/stable/gstreamer-GstSample.html>  
>  vs 
> GstBuffer
> <https://developer.gnome.org/gstreamer/stable/gstreamer-GstBuffer.html>  
> , you should find everything you need in the linked docs.

I'm still confused. Let me explain.
I understand that when appsink has a new frame, it sends "new-sample"
signal. In the callback used for this signal, I'm able to retrieve this
sample, but then I don't know what to do with it. As i said, some uses the
sample as the data to paint, but I'm not sure this is the right to do. I
know that I can get the buffer from this sample, but I can't find where I
can then get the pointer to the data, as GstBuffer is a container for
GStreamer.



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