decodes and returns the grabbed video frame . the methods/functions decode and return the just grabbed frame . if no frames has been grabbed camera has been disconnected , or there are no more frames in video file , the methods return false and the functions return null pointer . note : opencv 1.x functions cvretrieveframe and cv.retrieveframe return image stored inside the video capturing structure . it is not allowed to modify or release the image ! you can copy the frame using `` cvcloneimage '' and then do whatever you want with the copy . concode_field_sep long nativeObj concode_field_sep boolean n_isOpened concode_elem_sep boolean n_read concode_elem_sep boolean isOpened concode_elem_sep boolean read concode_elem_sep boolean set concode_elem_sep void release concode_elem_sep boolean n_set concode_elem_sep void n_delete concode_elem_sep void n_release concode_elem_sep List<Size> getSupportedPreviewSizes concode_elem_sep String n_getSupportedPreviewSizes concode_elem_sep boolean n_retrieve concode_elem_sep boolean n_retrieve concode_elem_sep double get concode_elem_sep boolean n_open concode_elem_sep boolean n_open concode_elem_sep void finalize concode_elem_sep boolean grab concode_elem_sep long n_VideoCapture concode_elem_sep long n_VideoCapture concode_elem_sep long n_VideoCapture concode_elem_sep boolean n_grab concode_elem_sep boolean open concode_elem_sep double n_get
boolean function ( Mat arg0 , int arg1 ) { boolean loc0 = n_retrieve ( nativeObj , arg0 . nativeObj , arg1 ) ; return loc0 ; }