OpenCV视频解码图片

1 视频解码图片

import cv2

#根据需要修改路径
cap = cv2.VideoCapture("D:/test/test.mp4")

i = 0
while cap.isOpened():
    ret, frame = cap.read()
    if not ret:
        break
    # frame 保存下来
    filename = "{}.png".format(i)
    # 保存的路径根据需要进行修改
    cv2.imwrite("imgs/"+filename, frame)
    i += 1

cap.release()

2 视频转视频

import cv2

cap = cv2.VideoCapture("D:/test/test.mp4")
width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
fps = cap.get(cv2.CAP_PROP_FPS)
fourcc = cv2.VideoWriter_fourcc(*'mp4v')
out = cv2.VideoWriter("test_out.mp4", fourcc, fps, (width, height), True)
i = 0
while cap.isOpened():
    ret, frame = cap.read()
    if not ret:
        break
    # 根据需要截取视频帧
    if i < 100:
        out.write(frame)
        
    i += 1

cap.release()
out.release()