How to find the accurate time of capturing a frame captured by an IP camera?

Question

We use an IP camera and by OpenCV, capturing frame is done. Because of running heavy weight image processing program, sometimes capturing a frame last 50 millisecond. How we can find the accurate time of capturing that frame? The accepted error is about 5 millisecond.

Answer 1

根据 opencv doc，VideoCapture 类的 get 公共方法（带有选项 CAP_PROP_POS_MSEC）以毫秒为单位提供视频文件的当前位置。因此它不适用于您从 rtsp 流中抓取的帧。