isOpened property

bool get isOpened

Returns true if video capturing has been initialized already.

If the previous call to VideoCapture constructor or VideoCapture::open() succeeded, the method returns true. https://docs.opencv.org/4.x/d8/dfe/classcv_1_1VideoCapture.html#aa6480e6972ef4c00d74814ec841a2939

Implementation

bool get isOpened => cvideoio.cv_VideoCapture_isOpened(ref);