python怎样播放视频？

import numpy as np

import cv2 as cv

cap = cv.VideoCapture('vtest.avi')

while cap.isOpened():

ret, frame = cap.read()

# if frame is read correctly ret is True

if not ret:

print("Can't receive frame (stream end?). Exiting ...")

break

gray = cv.cvtColor(frame, cv.COLOR_BGR2GRAY)

cv.imshow('frame', gray)

if cv.waitKey(1) == ord('q'):

break

cap.release()

cv.destroyAllWindows()

import pylab

import imageio

#视频的绝对路径

filename = '/path/to/your/video.mp4'

#可以选择解码工具

vid = imageio.get_reader(filename,  'ffmpeg')

for 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

    #image = skimage.img_as_float(im).astype(np.float32)

    fig = pylab.figure()

    fig.suptitle('image #{}'.format(num), fontsize=20)

    pylab.imshow(image)

pylab.show()