CV_LOG_WARNING(NULL, cv::format("VIDEOIO(%s): trying ...\n", #backend_func)); \
iwriter = backend_func; \
if (param_VIDEOIO_DEBUG || param_VIDEOWRITER_DEBUG) \
- CV_LOG_WARNING(NULL, cv::format("VIDEOIO(%s): result=%p isOpened=%d...\n", #backend_func, iwriter.empty() ? NULL : iwriter.get(), iwriter.empty() ? iwriter->isOpened() : -1)); \
+ CV_LOG_WARNING(NULL, cv::format("VIDEOIO(%s): result=%p isOpened=%d...\n", #backend_func, iwriter.empty() ? NULL : iwriter.get(), iwriter.empty() ? -1 : iwriter->isOpened())); \
} catch(const cv::Exception& e) { \
CV_LOG_ERROR(NULL, cv::format("VIDEOIO(%s): raised OpenCV exception:\n\n%s\n", #backend_func, e.what())); \
} catch (const std::exception& e) { \