ok, that is some good information, but still not detailed enough,
as there are info that it might be a 32 / 64 bit problem
-a- windows 10 64Bit?
-b- processing 3.5.3 download/setup also the 64bit version?
now obviously you play OpenCV,
but as you report the line in error is
video = new Capture(this, 640, 480);
and that has nothing to do with OpenCV
like on a fresh install after download
GitHub - atduskgreg/opencv-processing: OpenCV for Processing. A creative coding computer vision library based on the official OpenCV Java API ,
Releases · atduskgreg/opencv-processing · GitHub
rev 0.5.4
opencv_processing.zip
to your sketchbook/libraries/
folder and you open that example
LiveCamTest
you get the info that you need the video library
Video 1.0.1
The Processing Foundation
GStreamer-based video library for Processing.
and there pls check for:
...\libraries\video\library\windows64\libgio-2.0-0.dll
if that is missing uninstall/install again
and check if “win 10 windows defender” deletes something…