openIndexAsync method
Opens a camera for video capturing with API Preference and parameters.
https://docs.opencv.org/4.x/d8/dfe/classcv_1_1VideoCapture.html#a10867868137c2d142aac30a0648d00fe
Implementation
Future<bool> openIndexAsync(int index, {int apiPreference = CAP_ANY}) async => cvRunAsync(
(callback) => cffi.VideoCapture_OpenDeviceWithAPI_Async(ref, index, apiPreference, callback),
boolCompleter,
);