python读取视频流提取视频帧的两种方法

# coding:utf-8 
import pylab 
import imageio 
#注释的代码执行一次就好，以后都会默认下载完成 
#imageio.plugins.ffmpeg.download() 
import skimage 
import numpy as np 
 
#视频的绝对路径 
filename = 'video/01_01.wmv' 
#可以选择解码工具 
vid = imageio.get_reader(filename, 'ffmpeg') 
for num,im in enumerate(vid): 
 #image的类型是mageio.core.util.Image可用下面这一注释行转换为arrary 
 print im.mean() 
 image = skimage.img_as_float(im).astype(np.float64) 
 fig = pylab.figure() 
 fig.suptitle('image #{}'.format(num), fontsize=20) 
 pylab.imshow(im) 
pylab.show() 

import cv2 
video_full_path="video/01_01.wmv" 
cap = cv2.VideoCapture(video_full_path) 
print cap.isOpened() 
frame_count = 1 
success = True 
while(success): 
 success, frame = cap.read() 
 print 'Read a new frame: ', success 
 
 params = [] 
 #params.append(cv.CV_IMWRITE_PXM_BINARY) 
 params.append(1) 
 cv2.imwrite("video" + "_%d.jpg" % frame_count, frame, params) 
 
 frame_count = frame_count + 1 
 
cap.release()