基于OPenCV的视频播放变慢

分别使用tkinter，pygame，OpenCV播放视频，发现均有视频播放变慢的现象，源码如下：
使用tkinter，OpenCV播放视频：

from tkinter import *
import cv2
from PIL import Image, ImageTk

def video_play():
while video.isOpened():
ret, frame = video.read() # 读取照片
# print(‘读取成功’)
if ret == True:
img = cv2.cvtColor(frame, cv2.COLOR_BGR2RGBA) # 转换颜色使播放时保持原有色彩
current_image = Image.fromarray(img).resize((1920,1080)) # 将图像转换成Image对象
imgtk = ImageTk.PhotoImage(image=current_image)
movieLabel.imgtk = imgtk
movieLabel.config(image=imgtk)
movieLabel.update() # 每执行以此只显示一张图片，需要更新窗口实现视频播放
else:
break

root = Tk()
root.overrideredirect(True)
root.state(“zoomed”)
movieLabel = Label(root,width=1920,height=1080) # 创建一个用于播放视频的label容器
movieLabel.pack()
while True:
video = cv2.VideoCapture(r"E:\放松\xjj\掠影\原神\1612179174bfee75ebffaca79a.mp4_last.mp4") # 使用opencv打开本地视频文件
video_play() # 调用video_play实现视频播放

mainloop()
使用pygame，OpenCV播放视频：

import pygame
import sys
import cv2
import numpy as np
import os
import moviepy.editor as mpy

if name == ‘main’:
# 截取背景音乐
# audio_background = mpy.AudioFileClip(‘cs1.mp4’)
#
# audio_background.write_audiofile(‘cs1.mp3’)
pygame.init() # 初始化pygame
FPS = 100
#设置窗口位置
os.environ[‘SDL_VIDEO_WINDOW_POS’]=“%d,%d” % (5,30)
FPSClock = pygame.time.Clock()
size = width, height = 960, 540 # 设置窗口大小
screen = pygame.display.set_mode(size) # 显示窗口
color = (255, 255, 255) # 设置颜色
ogg=pygame.mixer.Sound(“cs1.mp3”)
#pygame.mixer.music.load(“”)

videoCapture = cv2.VideoCapture("cs2.mp4")
ogg.play()

while True:
    a=pygame.time.get_ticks()

    if videoCapture.isOpened():
        #从opncv读一段视频进来
        ret, frame = videoCapture.read()
        if ret :
            frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
            # frame = np.asarray(frame.resize((1920, 1080)))
            frame = cv2.resize(frame,(960,540),interpolation=cv2.INTER_CUBIC)
            frame = np.rot90(frame, k=-1)
            frame = pygame.surfarray.make_surface(frame)

            frame=pygame.transform.flip(frame,False,True)

            screen.blit(frame, (0,0))

    for event in pygame.event.get():  # 遍历所有事件
        if event.type == pygame.QUIT:  # 如果单击关闭窗口，则退出
            sys.exit()
    pygame.display.flip()  # 更新全部显示
    FPSClock.tick(FPS)
    pygame.time.get_ticks()

使用OpenCV播放视频：

import cv2
import numpy as np

import moviepy.editor as mpy

import pygame
pygame.init()

ogg=pygame.mixer.Sound(“cs1.mp3”)

背景音乐

cap = cv2.VideoCapture(“cs1.mp4”)
fps = cap.get(cv2.CAP_PROP_FPS)

ogg.play()

while (True):
# 读帧
ret, frame = cap.read()
# 显示图像
cv2.imshow(“video”, cv2.resize(frame,(960,540),interpolation=cv2.INTER_CUBIC))
# 图像的按比例压缩，
if cv2.waitKey(int(1000/fps)) & 0xFF == ord(‘q’):
break
cap.release()
cv2.destroyAllWindows()
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