在Python中,可以使用多种库来保存视频,以下是使用OpenCV和moviepy库保存视频的详细步骤:
使用OpenCV保存视频
1、安装OpenCV库:
“`
pip install opencvpython
“`
2、导入所需模块:
“`python
import cv2
import numpy as np
“`
3、读取视频文件:
“`python
video = cv2.VideoCapture(‘input_video.mp4’)
“`
4、获取视频的帧率、分辨率等信息:
“`python
frame_rate = video.get(cv2.CAP_PROP_FPS)
width = int(video.get(cv2.CAP_PROP_FRAME_WIDTH))
height = int(video.get(cv2.CAP_PROP_FRAME_HEIGHT))
“`
5、创建VideoWriter对象,指定输出视频的文件名、编码器、帧率和分辨率:
“`python
output_video = cv2.VideoWriter(‘output_video.avi’, cv2.VideoWriter_fourcc(*’XVID’), frame_rate, (width, height))
“`
6、逐帧读取视频并写入输出文件:
“`python
while True:
ret, frame = video.read()
if not ret:
break
output_video.write(frame)
“`
7、释放资源:
“`python
video.release()
output_video.release()
“`
使用moviepy库保存视频
1、安装moviepy库:
“`
pip install moviepy
“`
2、导入所需模块:
“`python
from moviepy.editor import *
“`
3、加载视频文件:
“`python
clip = VideoFileClip(‘input_video.mp4’)
“`
4、设置输出视频的文件名和格式:
“`python
output_video = clip.write_videofile(‘output_video.avi’)
“`
5、关闭moviepy编辑器:
“`python
quit()
“`
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