[d3d11screencapturesrc] standard resolutions works well, 3440x1440 not.

[Davide Perini]

Hi all.
I'm using this pipeline to capture the screen using GStreamer Java:

./gst-launch-1.0 d3d11screencapturesrc ! d3d11convert ! 
"video/x-raw(memory:D3D11Memory),width=3840,height=2160,sync=false" ! 
autovideosink

this pipeline works well with "standard resolutions" like 3840x2160 but 
it doesn't work well with more stretched resolutions like 3440x1440.

There are resolutions like 480x270 that works well with NVIDIA GPUs but 
not with AMD ones.

What do I mean for "it doesn't work well"?

The resolutions "that doesn't work well" seems to capture the screen 
with some pixel shifting,
I attach an image captured using a resolutions "that works well" and an 
image that captures the same image on a resolution "that doesn't works 
well".
As you can see in the OK image there is a black background with a white 
square on it, in the KO image the white square is completely "cutted" 
like if there are pixel shifting.

If I use that pipeline using the gst-launch-1.0 command, I can't 
reproduce the problem,
if I use the GStreamer Java binding, the problem is there.

You could say me that there must be a problem in the Java bindings, but 
what kind of problem could be there?
What's the difference between this resolutions, for example 3840x2160 
and 3440x1440?
And why some resolutions affects AMD GPUs and not NVIDIA ones?

Is there a way to "detect/recognize" this problem in order to switch to 
another pipeline that works well with all resolutions and GPUs like this 
one?
./gst-launch-1.0 d3d11screencapturesrc ! d3d11convert ! d3d11download ! 
"video/x-raw(memory:SystemMemory),width=3440,height=1440,sync=false" ! 
autovideosink

Any ideas or toughts that points me a step further in understanding this 
problems will be really apprecaited :)

Thanks


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