Opengl framebuffer source

arizonausa penbosidodev at gmail.com
Fri Jul 15 16:48:52 UTC 2016


Hi Matt,

Thanks for your answer. Sorry for the unclear question. what we actually do
is using OpenGL to do alpha blending of two 2D textures, one is in RGBA
format, and another is YUV, we also use fragment shader to do colorspace
transformation for YUV texture first and alpha blending of two textures
before rendering to screen. Right now, in addition to render to screen, I
also want to grab the pixel data after fragment shader to a Frame buffer
object, which should be in RGBA format, and sample this blended pixel data
into YUV420 data, then reroute those YUV420 data back to CPU for the next
processing.

So The question is there have any Gstreamer plugins can save the pixel data
after my fragment shader, and then do the shader based sampling and other
thing then, Thank you.

Kevin



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