estimateOptimalTrimRatio  167 modules/videostab/include/opencv2/videostab/motion_stabilizing.hpp CV_EXPORTS float estimateOptimalTrimRatio(const Mat &M, Size size);
estimateOptimalTrimRatio  447 modules/videostab/src/stabilizer.cpp                 trimRatio_ = std::max(trimRatio_, estimateOptimalTrimRatio(S, frameSize_));