Hello I try use 2 webcams in opencv 3.10 simultaneously
It seems that framerate drops down from 25 fps to ~ 20 fps on one webcam and from 30 to ~20 fps on the other. If I comment all code relevant to one of the webcams fps comes back to 25 fps or 30 fps depending on webcam.
I tried different methods
VideoCapture >> UMat; //or
VideoCapture.grab(); VideoCapture.retrive();
Also I tried to grab fames in different threads using std::async.
The result is always the same.
The code is simple loop with waitKey(30) and imshow
Platform: Windows 10 x64 Visual Studio 2015 community,
Build type is win32