python读取视频长度

import cv2
import os


def video_duration(dir_name):
    sum_duration = 0
    for root, dirs, files in os.walk(dir_name, topdown=False):
        for filename in files:
            cap = cv2.VideoCapture(dir_name + "\\" + filename)
            if cap.isOpened():
                rate = cap.get(5)
                frame_num = cap.get(7)
                duration = frame_num / rate
                sum_duration += duration
    return sum_duration

if __name__ == '__main__':
    file = r"D:\Movie1\神话"
    total_video_time = video_duration(file)
    print("{file} 目录下全部视频总时长为：秒"+total_video_time)

# coding=utf8
__author__ = 'Administrator'

import cv2
import os
import time


def video_duration(dir_name):
    sum_duration = 0
    for root, dirs, files in os.walk(dir_name, topdown=False):
        for filename in files:
            cap = cv2.VideoCapture(dir_name + "\\" + filename)
            if cap.isOpened():
                rate = cap.get(5)
                frame_num = cap.get(7)
                duration = frame_num / rate
                sum_duration += duration
    return sum_duration

def test(path):
    mydict={}
    items=[]
    for dirpath, dirnames, filenames in os.walk(path):
        for filename in filenames:
            full_path=os.path.join(dirpath, filename)
            cap = cv2.VideoCapture(full_path)
            if cap.isOpened():
                rate = cap.get(5)
                frame_num = cap.get(7)

                duration = frame_num / rate
                item = int(duration)
                if item not in items:
                    items.append(item)
                mydict[full_path]=item
    return mydict,items

if __name__ == '__main__':
    start =time.time()

    file = r"D:\Movie1\神话"
    # total_video_time = video_duration(file)
    # print("{file} 目录下全部视频总时长为：秒"+str(total_video_time))
    end = time.time()
    cost =end-start
    print("cost:",cost)

    mydict, items= test(file)
    print(items)
    totaldict={}
    for key,v in mydict.items():
        print("key: "+str(key)+"\tv: "+str(v))
        for j in items:
            if v==j:
                if j not in totaldict:
                    totaldict[j]=[key]
                else:
                    totaldict[j]=totaldict[j]+[key]

    for key,v in totaldict.items():
        print("key: "+str(key)+"\tv: "+str(v)) 
 #最后把相同长度的电影分成了一组

结果如下所示，一个长度对应几个电影的路径 

 key: 2765    v: ['D:\\Movie1\\神话\\神话-01.mp4']
key: 2492    v: ['D:\\Movie1\\神话\\神话-02.mp4', 'D:\\Movie1\\神话\\神话-04.mp4', 'D:\\Movie1\\神话\\神话-08.mp4', 'D:\\Movie1\\神话\\神话-11.mp4']
key: 2491    v: ['D:\\Movie1\\神话\\神话-03.mp4', 'D:\\Movie1\\神话\\神话-05.mp4', 'D:\\Movie1\\神话\\神话-10.mp4', 'D:\\Movie1\\神话\\神话-12.mp4']
key: 2493    v: ['D:\\Movie1\\神话\\神话-06.mp4']
key: 2490    v: ['D:\\Movie1\\神话\\神话-07.mp4', 'D:\\Movie1\\神话\\神话-09.mp4', 'D:\\Movie1\\神话\\神话-14.mp4', 'D:\\Movie1\\神话\\神话-17.mp4', 'D:\\Movie1\\神话\\神话-18.mp4', 'D:\\Movie1\\神话\\神话-20.mp4', 'D:\\Movie1\\神话\\神话-32.mp4', 'D:\\Movie1\\神话\\神话-33.mp4', 'D:\\Movie1\\神话\\神话-40.mp4']
key: 2488    v: ['D:\\Movie1\\神话\\神话-13.mp4', 'D:\\Movie1\\神话\\神话-25.mp4', 'D:\\Movie1\\神话\\神话-44.mp4']
key: 2489    v: ['D:\\Movie1\\神话\\神话-15.mp4', 'D:\\Movie1\\神话\\神话-16.mp4', 'D:\\Movie1\\神话\\神话-22.mp4', 'D:\\Movie1\\神话\\神话-24.mp4', 'D:\\Movie1\\神话\\神话-26.mp4', 'D:\\Movie1\\神话\\神话-28.mp4', 'D:\\Movie1\\神话\\神话-29.mp4', 'D:\\Movie1\\神话\\神话-30.mp4', 'D:\\Movie1\\神话\\神话-31.mp4']
key: 2487    v: ['D:\\Movie1\\神话\\神话-19.mp4', 'D:\\Movie1\\神话\\神话-23.mp4', 'D:\\Movie1\\神话\\神话-36.mp4', 'D:\\Movie1\\神话\\神话-48.mp4', 'D:\\Movie1\\神话\\神话-49.mp4']
key: 1232    v: ['D:\\Movie1\\神话\\神话-21.mp4']
key: 2486    v: ['D:\\Movie1\\神话\\神话-27.mp4', 'D:\\Movie1\\神话\\神话-37.mp4', 'D:\\Movie1\\神话\\神话-38.mp4', 'D:\\Movie1\\神话\\神话-42.mp4', 'D:\\Movie1\\神话\\神话-43.mp4', 'D:\\Movie1\\神话\\神话-45.mp4', 'D:\\Movie1\\神话\\神话-46.mp4']
key: 2485    v: ['D:\\Movie1\\神话\\神话-34.mp4', 'D:\\Movie1\\神话\\神话-35.mp4', 'D:\\Movie1\\神话\\神话-41.mp4']
key: 2484    v: ['D:\\Movie1\\神话\\神话-39.mp4', 'D:\\Movie1\\神话\\神话-47.mp4']
key: 2673    v: ['D:\\Movie1\\神话\\神话-50end.mp4']