How to play video in python

The methods are: 1. Use the OpenCV library to play the video; 2. Use the pygame library to play the video; 3. Use the moviepy library to play the video, etc.

# As a high-level programming language, Python has many libraries and tools that can be used to play videos. In this article, I will introduce some commonly used libraries and tools, along with their basic usage and sample code.

Playing videos using the OpenCV library

OpenCV is an open source library for computer vision that provides many image and video processing functions. In Python, we can use OpenCV to play videos.

First, you need to install the OpenCV library. You can use the pip command to install it:

pip install opencv-python

After the installation is complete, you can use the following code to play the video:

import cv2
# 打开视频文件
cap = cv2.VideoCapture('video.mp4')
# 检查视频是否成功打开
if not cap.isOpened():
    print("Error opening video file")
# 播放视频
while cap.isOpened():
    ret, frame = cap.read()
    if ret:
        cv2.imshow('Video', frame)
        if cv2.waitKey(25) & 0xFF == ord('q'):
            break
    else:
        break
# 释放视频流
cap.release()
cv2.destroyAllWindows()

In this code, we first use the cv2.VideoCapture function Open the video file, then use the cap.read function to read each frame of the video, and use the cv2.imshow function to display each frame. Finally, we use the cv2.waitKey function to control the playback speed of the video and exit the video playback when the 'q' key is pressed.

Use the pygame library to play videos

pygame is a library used for game development. It also provides functions for multimedia processing. In Python we can use pygame to play videos.

First, you need to install the pygame library. You can use the pip command to install it:

pip install pygame

After the installation is complete, you can use the following code to play the video:

import pygame
import time
# 初始化pygame
pygame.init()
# 打开视频文件
video = pygame.movie.Movie('video.mp4')
# 播放视频
video_screen = pygame.display.set_mode(video.get_size())
video.play()
while video.get_busy():
    time.sleep(0.01)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            video.stop()
            pygame.quit()
# 退出pygame
pygame.quit()

In this code, we first use pygame.movie. The Movie function opens a video file and then uses the video.play function to play the video. During video playback, we use the time.sleep function to control the playback speed of the video, and use the pygame.event.get function to listen for the exit event to stop the video playback when exiting.

Use moviepy library to play videos

moviepy is a library for video editing, which provides many video processing functions. In Python, we can use moviepy to play videos.

First, you need to install the moviepy library. You can use the pip command to install it:

pip install moviepy

After the installation is complete, you can use the following code to play the video:

from moviepy.editor import VideoFileClip
# 打开视频文件
video = VideoFileClip('video.mp4')
# 播放视频
video.preview()

In this code, we first use the VideoFileClip function to open the video file, and then use the video.preview function to play the video. This function will open a new window to display the video, and also provides some functions to control video playback.

In this article, I introduce three commonly used libraries and tools to play videos: OpenCV, pygame and moviepy. Each method has its own unique usage and characteristics, and you can choose the appropriate method according to your needs. I hope this information is helpful and good luck with your project when it comes to playing videos in Python!

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