If you have installed prebuilt nnstreamer-openvino binary from nnstreamer PPA and installed openvino from somewhere else, our openvino subplugin (libnnstreamer_filter_openvino.so) may have openvino symbols that are not compatible with the openvino binary you have installed.

Suggestion: Approach 1: rebuilt nnstreamer-openvino with the openvino you have installed (you will need to add "devel" package) Approach 2: uninstall your openvino binary and install openvino from our PPA.