GStreamer extreme lag when screen capture OpenGL/Vulkan or DX11/DX12 contents

[Davide Perini]

PS:
I noticed that this happen when using dxgiscreencapsrc but not when 
using dx9screencapsrc.
This is really bad since dxgiscreencapsrc is so better.

Thanks


Il 07/08/2020 20.33, Davide Perini ha scritto:
> Hi guys,
> I have noticed a very strange behaviour when screen capturing using 
> gstreamer.
>
> I am using this command line for my try in Windows 10.
>
> ./gst-launch-1.0 dxgiscreencapsrc ! videoscale method=0 ! videoconvert 
> ! autovideosink sync=false
>
> This command launch a gstreamer window where I can see my screen 
> beeing captured.
> The command capture at a locked 30 FPS no matter what other software 
> or windows I open.
>
> If I open an OpenGL/Vulkan or DX11/DX12 window, screen capture remains 
> at a locked 30FPS
> but as soon as I click on the 3D window the screen capture framerate 
> drops significantly to 10FPS or even worse.
>
> It's strange because if I change the focus on a non 3D window, without 
> closing the 3D window,
> the framerate returns to 30FPS.
> Note that framerate drops occurs in the screen capture window, not in 
> the 3D window.
>
> How this is possible?
> Is there a way to fix this problem?
>
> Thank you all guys, I really appreciate your work here and the help 
> you give people on this community :)
>
> Bye
> Davide
>
>
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> gstreamer-devel at lists.freedesktop.org
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