Identify a numpy frame fed into the pipeline

There is no update from you for a period, assuming this is not an issue anymore. Hence we are closing this topic. If need further support, please open a new one. Thanks

Yes. About the binding of copy_func and release_func, we have released it in the latest version. About the user_data, it’s a gpointer in C/C++ code. You can refer to the FAQ 31.2 and bind that with that patch.