简单处理Opencv3的视频操作读写avi,mp4,flv

最新推荐文章于 2025-11-04 14:38:12 发布

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最新推荐文章于 2025-11-04 14:38:12 发布 · 1.6k 阅读

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CC 4.0 BY-SA版权

本文详细介绍如何使用Python的OpenCV库读取和写入不同格式的视频文件，包括avi、mp4和flv，涵盖视频帧的读取、保存为图片、从图片重新构建视频等过程。

1. 读视频文件

import cv2
 
# This is a demo of running face recognition on a video file and saving the results to a new video file.
#
# PLEASE NOTE: This example requires OpenCV (the `cv2` library) to be installed only to read from your webcam.
# OpenCV is *not* required to use the face_recognition library. It's only required if you want to run this
# specific demo. If you have trouble installing it, try any of the other demos that don't require it instead.
 
# Open the input movie file
input_movie = cv2.VideoCapture("D:/work_test/object_predict.avi")
length = int(input_movie.get(cv2.CAP_PROP_FRAME_COUNT))
 
pre_file = '12_28_62_'
f_index = 0
 
while True:
    # Grab a single frame of video
    ret, frame = input_movie.read()
 
    # Quit when the input video file ends
    if not ret:
        break
    
    frame_resize = cv2.resize(frame,