Learning OpenCV 4 Computer Vision with Python 3 - Third Edition

Reading/writing a video file

OpenCV provides the VideoCapture and VideoWriter classes, which support various video file formats. The supported formats vary depending on the operating system and the build configuration of OpenCV, but normally it is safe to assume that the AVI format is supported. Via its read method, a VideoCapture object may be polled for new frames until it reaches the end of its video file. Each frame is an image in a BGR format.

Conversely, an image may be passed to the write method of the VideoWriter class, which appends the image to a file in VideoWriter. Let's look at an example that reads frames from one AVI file and writes them to another with a YUV encoding:

import cv2videoCapture = cv2.VideoCapture('MyInputVid.avi') ...