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比如说我有多个视频流地址,类似与这样: videoList = [ "rtmp://192.168.99.125:11935/hls/32010000001320000730_32010000001320000730", "rtmp://192.168.99.125:11935/hls/32010000001320000727_32010000001320000727" ] 应该怎么抽帧? 比如说每隔2秒抽帧一次怎么弄?

你好朋友,我在树莓派3B+上编译了opencv-4.1.0版,用如下代码获取数据帧时只能得到不超过每秒10帧的数据,用imshow显示就是卡顿,摄像头是720P的,而且在windows10中用系统自带的照相机程序录制可以达到每秒接近30帧,这明显不是摄像头问题,是我代码写的有问题,还是树莓派硬件性能不行,望赐教。代码如下: ``` import cv2 import time cap=cv2.VideoCapture(0) cap.set(6,cv2.VideoWriter_fourcc(*'MJPG')) cap.set(3,1280) cap.set(4,720) cap.set(5,30) print cap.get(3) print cap.get(4) print cap.get(5) count=0 t=int(time.time()) while True: ret,frame=cap.read() if ret: if int(time.time())-t==0: count+=1 else: print("%s: %s"...

[Python](https://github.com/Yonv1943/Python/tree/master)/[scow](https://github.com/Yonv1943/Python/tree/master/scow) /China_A_shares.pandas.dataframe 里面的文件好似无法下载