如何减少OpenCV python中的帧数？

import cv2

cap = cv2.VideoCapture('video.mp4')
cap.set(cv2.CAP_PROP_FPS, 10)  # 设置帧率为10fps

while cap.isOpened():
    ret, frame = cap.read()
    if not ret:
        break
    # 处理帧数据
    cv2.imshow('Frame', frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()

import cv2

cap = cv2.VideoCapture('video.mp4')
frame_count = 0
skip_frames = 5  # 每隔5帧处理一次

while cap.isOpened():
    ret, frame = cap.read()
    if not ret:
        break
    frame_count += 1
    if frame_count % skip_frames == 0:
        # 处理帧数据
        cv2.imshow('Frame', frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()

import cv2

cap = cv2.VideoCapture('video.mp4')
width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
new_width = int(width / 2)  # 将宽度减半
new_height = int(height / 2)  # 将高度减半

while cap.isOpened():
    ret, frame = cap.read()
    if not ret:
        break
    # 调整图像大小
    frame = cv2.resize(frame, (new_width, new_height))
    # 处理帧数据
    cv2.imshow('Frame', frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()