All tests writing temporary files are updated to use cv::tempfile() function

modules/gpu/test/test_video.cpp

@@ -687,7 +687,7 @@ PARAM_TEST_CASE(VideoWriter, cv::gpu::DeviceInfo, std::string)
         cv::gpu::setDevice(devInfo.deviceID());
 
         inputFile = std::string(cvtest::TS::ptr()->get_data_path()) + "video/" + inputFile;
-        outputFile = inputFile.substr(0, inputFile.find('.')) + "_test.avi";
+        outputFile = cv::tempfile(".avi");
     }
 };