#include <opencv2/opencv.hpp> #include <chrono> #include <iostream> int main() { const std::string video_path = "/media/builderx/data1/xw_tooth/tooth/2025_02_12T09_32_17__stream0.mp4"; constexpr int SAVE_INTERVAL_SEC = 20; // 常量表达式更规范 cv::VideoCapture cap(video_path); if (!cap.isOpened()) { std::cerr << "Error opening video: " << video_path << std::endl; return -1; } cv::namedWindow("Stream Preview", cv::WINDOW_NORMAL); cv::Mat frame; auto last_save_time = std::chrono::steady_clock::now(); while (true) { if (!cap.read(frame) || frame.empty()) break; // 合并判断条件 // 实时预览处理 cv::resizeWindow("Stream Preview", frame.size()/2); cv::imshow("Stream Preview", frame); // 帧保存逻辑 const auto now = std::chrono::steady_clock::now(); const auto elapsed_sec = std::chrono::duration_cast<std::chrono::seconds>( now - last_save_time).count(); if (elapsed_sec >= SAVE_INTERVAL_SEC) { const auto timestamp = std::chrono::duration_cast<std::chrono::milliseconds>( now.time_since_epoch()).count(); // 添加毫秒保证唯一性 const std::string filename = "frame_" + std::to_string(timestamp) + ".png"; if (cv::imwrite(filename, frame)) { std::cout << "Saved frame: " << filename << std::endl; last_save_time = now; // 使用精确的当前时间更新 } } // 退出控制 if (cv::waitKey(30) >= 0) break; } cap.release(); cv::destroyAllWindows(); return 0; }帮我看看我的代码里，视频处理完的图片保存到了哪里，清晰明了直接告诉我