diff --git a/upbot_SORT/README.md b/upbot_SORT/README.md index ff9ae00..e8d436d 100644 --- a/upbot_SORT/README.md +++ b/upbot_SORT/README.md @@ -45,10 +45,37 @@ imgshow大约花费3.5ms(单帧图像imgshow的操作) 使用python opencv读取一段视频,仅进行读取,消耗时间在25ms左右。 +``` +while True: + frame_time = time.time() + ret, frame = cap.read() + + if not ret: + print("End of video or failed to read frame.") + break + # 显示当前帧 + cv2.imshow("Video Playback", frame) + frame_time = time.time() - frame_time + print(f"frame cost: {1000*frame_time:.2f} ms") +``` + ![1](./image/1.jpg) 使用c++ opencv读取一段时间,仅进行读取,消耗时间在30ms左右,但也有40ms+和50ms+以及10ms的情况,不太稳定。 +``` + while (true) { + int64 t = getTickCount(); + // 读取视频帧 + cap >> frame; + // // 显示当前帧 + // cv::imshow("Video Playback", frame); + int64 t1 = getTickCount()-t; + std::cout << frame_num << " frame cost:"<< t1*1000/cv::getTickFrequency()<< "ms" << std::endl; + frame_num++; + } +``` + ![2](./image/2.jpg) c++不添加指定帧率(cap.set(cv::CAP_PROP_FPS, 30)),读取帧率速度花费时间会很长,不添加指定帧率的情况下读取一帧需要200ms。